Answer:
By preventing the binding of substrate to active site
Explanation:
Competitive inhibitors exhibit a type of reversible inhibition. These are the substances that bind to the binding site of the substrate on the enzyme, that is the active site.
One the competitive inhibitor is bound to the active site on the enzyme, the substrate cannot bind to it and there is no enzyme-substrate complex formation. Hence, the competitive inhibitor inhibits/slow down the enzyme catalysis by occupying the active site of the enzyme and thereby not allowing the substrate to bind to the enzyme.
A competitive inhibitor slows enzyme catalysis by binding to the active site, preventing the substrate from binding.
Explanation:A competitive inhibitor slows enzyme catalysis by binding to the active site of the enzyme, preventing the substrate from binding. The inhibitor competes with the substrate for the active site, reducing the amount of enzyme-substrate complexes formed and slowing down the overall reaction rate. This can be illustrated using the example of succinate dehydrogenase, where the competitive inhibitor, malonate, competes with the substrate, succinate, and slows down the conversion of succinate to fumarate.
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Name four groups of organic compounds found in living things.
Answer:
•Protiens
•Nucleic Acids
•Lipids
•Carbohydrates
The four main groups of organic compounds in living things are carbohydrates, proteins, lipids, and nucleic acids, each playing a vital role in energy supply, structural support, metabolic reactions, and genetic information storage.
Explanation:The four major classes of organic compounds essential for life processes in living things are:
Carbohydrates serve as a primary source of energy and structural components. Monomers, such as glucose, are the building blocks for carbohydrate polymers like starch and glycogen.
Proteins, composed of amino acid monomers, perform a vast array of functions including catalysis of metabolic reactions, DNA replication, and transport of molecules.
Lipids are a diverse group of hydrophobic molecules. Fats, oils, waxes, and steroids are examples of lipids that serve as energy storage and constitute cellular membranes.
Nucleic Acids, such as DNA and RNA, are polymers made of nucleotide monomers and are essential for storing and transmitting genetic information.
why natural selection might favor traits that keep 2 individuals from populations that had been reproductively isolated for a long time from mating (pre-zygotic isolation), even if hybrid offspring technically would still be possible if mating were to take place?
Answer:
Pre-zygotic isolation prevents a zygote from being formed that cannot survive or provide more offspring in the future
Explanation:
If pre-zygotic isolation was not in place hybrid offspring would be possible, but then there might be hybrid inviability, sterility and breakdown (post-zygotic isolation). Inviability when the hybrid does not survive to reproduction. Sterility is when the hybrid is not able to produce offspring. Breakdown is when the hybrid is viable and fertile but its offspring is not. Pre-zygotic isolation is in place to prevent wasting energy on reproducing and creating offspring that would not be able to add to the species.
Natural selection might favor traits that prevent individuals from two long-time reproductively isolated populations from mating, notably when hybrids have reduced fitness. These traits strengthen pre-zygotic barriers, ensuring the species remain separate. This process, called reinforcement, drives divergence between the species.
Explanation:Natural selection might favor traits that prevent individuals from two long-time reproductively isolated populations from mating, creating pre-zygotic isolation due to various reasons. The process of reproductive isolation plays a crucial role in this context. Genetic and phenotypic divergence over time might affect characteristics influencing reproduction, making mating less likely or the offspring less viable.
Pre-zygotic mechanisms include traits that control mating behavior, such as mating time, sensitivity to pheromones, choice of mating sites, and courtship rituals. Physiological changes might also prevent successful fertilization. If two closely related species continue to produce hybrids, they would develop reproductive barriers to prevent hybrid production and ensure that they remain separate species.
Instances where hybrids have reduced fitness compared to the parent species, there is a process called reinforcement that further drives divergence between the two species. This is because the low success of the hybrids reinforces the original speciation, leading to the strengthening of pre-zygotic barriers.
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Which of the following does not describe a function of aggressive animal behavior?
A. Aggressive behavior is displayed to establish territorial boundaries.
B. Aggressive behavior leads to fights that allow strong animals kill off weaker members of the species.
C. Aggressive behavior is displayed to establish hierarchy without violence.
D. Aggressive behavior is displayed to determine who is allowed to mate.
Answer:
Option (C).
Explanation:
Aggressive behavior is a type of animal behavior that has the potential to harm the other animals. Aggressive behavior can be used for the establishment of territorial boundaries and protect the other members of the population.
Aggressive behavior is generally shown by the conflict or fight between the species. The strong animals kill the weaker animals in case of predatory type of aggressive behavior. The hierarchy in case of aggressive behavior cannot be performed without violence. Violence or fight must occur between the species in case of aggressive behavior.
Thus, the correct answer is option (C).
B. Aggressive behavior leads to fights that allow strong animals to kill off weaker members of the species.
Aggressive behavior does commonly lead to fights, but it usually ends when the weaker animal retreats, not to the death.
The medial edge of the popliteal fossa is created by which muscle?
A.
Gracilis
B.
Semitendinosus
C.
Biceps femoris
D.
All of the above
Answer:
B. Semitendinosus
Explanation:
The medial edge of the popliteal fossa is created by Semitendinosus muscles.
Which processes takes place in the cytoplasm of a cell?
Answer:
the processes like cell division, metabolism, cell digestion, etc.
Explanation:
The cytoplasm is the clear liquid part of the cell. It contains many ions, proteins, amino acids, and cellular organelles.
The cytoplasm always in motion in the cell known as Brownian motion. It contains many cell organelles such as mitochondria, endoplasmic reticulum, lysosomes, peroxisomes, etc. As it contains many organelles and ions, many cellular functions also occur in the cytoplasm
The major processes take place in the cytoplasm are cellular metabolism or cellular respiration, transport, cell division, protein synthesis.
The translation occurs in the cytoplasm. The mRNA from the nucleus enters into the cytoplasm and takes part in protein synthesis with the help of ribosomes, amino acids.
The transport of different ions occurs in the cytoplasm to the nucleus and other cells by diffusion.
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Which of the following does not generally occur?
A. A fertilized egg splitting into two embryos
B. A single sperm fertilizing a single egg
C. Two sperm fertilizing two different eggs at the same time
D. Two different sperm both fertilizing the same egg
Answer:
D
Explanation:
Six-year-old Lydia presents with her mother with a chief complaint of I dont feel well and I have a rash. Mom states it started yesterday on her face and is much worse today. Lydia has had a fever for two days and complains of a sore throat. What questions would you include in your history and what characteristics of the physical assessment would help in determining the origin?
________ is one of a group of sleep disorders in which unwanted, disruptive motor activity and/or experiences during sleep play a role. A. insomnia B. NREM phase C. parasomnia D. REM phase
Answer:
I believe the answer is parasomnia
Explanation:
Parsomnia are conditions that produce unwanted, disruptive motor activity such as sleep walking.
Answer:
C. parasomnia
Explanation:
Parasomnia is one of a group of sleep disorders in which unwanted, disruptive motor activity and/or experiences during sleep play a role.
What best explains the observation of an enzyme being selective in the reaction it catalyzes?
a. Reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.
b. Molecules and active sites vary in size; only properly sized molecules can fit.
c. There is a precise compatibility between an enzyme's active site and the substrate molecule.
d. Specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.
e. Active sites carry slight negative charges, while substrates tend to carry slight positive charges.
Answer:
its c.
Explanation:
i had this question on a study guide.
Morgan obtains a score on a screening device for depression, which indicates the presence of significant depression. Morgan's psychologist is most likely to do what at this point in the assessment process?
Answer: Recommend further assessment.
Explanation:
Psychologists can usually tell if you have depression by asking you specific questions and doing a physical exam. Psychologists may, however, ask for lab tests to rule out other diagnoses. They will likely do blood tests to check for medical conditions that may cause depressive symptoms.
In 1987 a group of molecular geneticists at the University of California at Berkeley offered support for the idea that modern humans (AMHs) arose fairly recently in Africa, then spread out and colonized the world. The geneticists analyzed genetic markers in placentas donated by 147 women whose ancestors came from Africa, Europe, the Middle East, Asia, New Guinea, and Australia. By estimating the number of mutations that had taken place in the mithochondrial DNA (mtDNA) of each of these samples, the researchers concluded that......
A. everyone alive today has mtDNA that descends from a woman (dubbed Eve) who lived in sub-Saharan Africa around 200,000 years ago and that her descendants left Africa no more than 135,000 years ago.
B. everyone alive today has mtDNA that descents from a woman (dubbed Eve) who lived in Asia aorund 50,000 years ago and that her descendants left Asia 100,000 years ago.
C. establishing a "genetic clock" to model human evolution is reliable only when focusing on 50,000 years into the past.
D. everyone alive counts Neandertals of western Europe as their ancestor.
E. Neanderthals coexisted with modern humans in the Middle East for the least 2,000 years.
Answer:
A
Explanation:
mtDNA is inherited from the mother of a child, this is because mitochondria are in the cytoplasm and the father's gamete (sperm cell) contributes very little or no cytoplasm to the zygote. We know that mitochondrial Eve came from Africa because the mutations in the mtDNA occurred before the out-of-Africa dispersal.
Following glycolysis and the citric acid cycle, but before the electron transport chain and oxidative phosphorylation, the carbon skeleton of glucose has been broken down to CO2 with some net gain of ATP. Most of the energy from the original glucose molecule at that point in the process, however, is stored in the form of which of the following molecules?
(A) NADH
(B) glucose
(C) pyruvate
(D) acetyl-CoA
Answer: Energy at this point is stored as NADH
Explanation: Glycolysis is a catabolic reaction that is made of many steps that breaks down food to give off energy in a form of ATP. Pyruvate the product of glycolysis, is converted to Acetyl-coA using enzyme pryruvate dehydrogenase. During this process between krebs cycle and oxidative phosphorylation NAD takens electron (reduction) and turns to NADH(oxidation) which travels to the mitochondria, our power house, where its converted to energy using redox reactions. To sum up, energy from glucose molecules are transported and exist in forms of NAD to NADH.
The energy from the original glucose molecule before the electron transport chain and oxidative phosphorylation is primarily stored in NADH (A), which carries high-energy electrons for ATP production.
Explanation:Before oxidative phosphorylation, most of the energy from the original glucose molecule has been transferred to high-energy electron carriers during glycolysis and the citric acid cycle. The correct answer is (A) NADH as it carries electrons that are later used in the electron transport chain to generate a significant amount of ATP. After glycolysis, pyruvate is decarboxylated forming acetyl-CoA, which then enters the citric acid cycle. Here, two high-energy electrons are removed and accepted by NAD+ to form NADH. This step is critical because each NADH will enter the electron transport chain to produce more ATP than that generated through substrate-level phosphorylation alone.
After the conversion of pyruvate into the acetyl group, a molecule of carbon dioxide and two high-energy electrons are removed. The carbon dioxide accounts for two of the six carbons of the original glucose molecule. The electrons are picked up by NAD+, and the NADH carries the electrons to a later pathway for ATP production.
At this point, most of the energy from the original glucose molecule is stored in the form of NADH.
How can zoning laws be beneficial to a city's residents? a. They prevent new business development. b. They can prevent new development that would harm established residents. c. They limit the maximum height of buildings. d. They restrict who can live in a city.
Answer:
They can prevent new development that would harm established residents.- b.
Answer:
The correct answer is option b. "They can prevent new development that would harm established residents".
Explanation:
Zoning laws, also known as zoning ordinance, is a series of regulations that define how properties at certain geographic locations can be used. These laws are beneficial to city's residents by preventing new developments that would harm established residents. For instance, a company that emits gas pollutants can not be established at residential zones because that action would harm's the city's residents health.
Which of the following does not describe a function of aggressive animal behavior?
A. Aggressive behavior is displayed to establish territorial boundaries.
B. Aggressive behavior leads to fights that allow strong animals kill off weaker members of the species.
C. Aggressive behavior is displayed to establish hierarchy without violence.
D. Aggressive behavior is displayed to determine who is allowed to mate
Answer:
C
Explanation:
Aggressive behaviour is a act of violence not without it
Answer:
The correct answer is option C.
Explanation:
Aggressive behaviour is a type of behaviour which is widespread in the animal kingdom. Animals display this behaviour by expressing it in the form of anger and violence.
Animals use this behaviour mostly to establish its dominant nature in front of the opponent in the competition. This allows animals to either kill an animal in a fight (violence) or establish territorial boundaries and some species compete to mate with the female individual.
Thus, option C is the correct answer.
Capsular hydrostatic pressure is the chief force pushing water and solutes out of the blood and across the filtration membrane. (True/False)
Answer:
False
Explanation:
Capsular hydrostatic pressure is not the main force that pushes water and solutes out of the blood and through the filtration membrane. On the contrary, this pressure acts against the filtration membrane, making it difficult for water and solutes to escape from the blood.
Increasing this pressure decreases the infiltration rate and causes obstruction of the urinary tract that tends to accumulate urine, causing a lot of pain to the patient with Renal Failure.
Tall height is dominant to short height in pea plants. You have a tall pea plant that you cross with a short pea plant. What is the genotype of the tall parent if some of the offspring are short? The tall parent was homozygous dominant and the offspring were all homozygous dominant The tall parent was homozygous dominant There is not enough information to answer this question. The tall parent was heterozygous The offspring were all homozygous dominan
Answer:
The tall parent was heterozygous
Explanation:
If tall height is dominant to short height the only genotype possible for short height is hh, while there are two possible genotypes for tall height, Hh and HH. When HH is crossed with hh all the offspring are Hh, but if Hh is crossed with hh, a quarter of the offspring is HH, a quarter is hh and half is Hh. If the tall pea plants were HH there would only be tall offspring, but because there are some short offspring we know that the tall pea plants must have a genotype of Hh.
What are the general steps of the Scientific Method, in order?
General steps of the Scientific Method, in order:
1. Observe
2. Ask questions
3. Make a hypothesis
Final answer:
The scientific method is a structured approach to inquiry that includes steps such as making observations, asking questions, conducting research, forming hypotheses, testing these hypotheses, analyzing data, drawing conclusions, and communicating results.
Explanation:
The scientific method is a systematic approach to research and problem-solving in science. It follows a specific series of steps to ensure that conclusions are based on systematically gathered and analyzed evidence. The general steps, in order, are as follows:
Make observations: This is the process of gathering information about phenomena or systems of interest to prompt further investigation.Formulate a question: Based on initial observations, a specific question that seeks to explain the phenomena is posed.Conduct research: Investigate existing sources to understand what is already known about the subject or problem.Form a hypothesis: Develop a testable prediction that provides a possible answer to the research question.Test the hypothesis: Conduct experiments or collect data to test the validity of the hypothesis.Analyze the data: Look at the results to determine if they support or refute the hypothesis.Draw conclusions: Based on the data analysis, decide whether the hypothesis was correct. If the hypothesis is incorrect, consider alternative explanations.Communicate results: Share findings with others through publication, presentations, or other forms of dissemination.The scientific method is an iterative process, meaning that these steps are often repeated to refine hypotheses and increase the understanding of the subject matter.
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Which chamber of the heart pumps blood to the rest of the body?
A. Right ventricle
B. Left atrium
C. Left ventricle
D. Right atrium
Answer: C
Explanation: Left ventricle. With the thickest muscle mass of all the chambers, the left ventricle is the hardest pumping part of the heart, as it pumps blood that flows to the heart and rest of the body other than the lungs.
Answer:
its "C"
Explanation:
From the left ventricle the blood goes through the aortic semilunar valve to get to the rest of the body through the systemic circuit.
Which functional area of the brain is responsible for keeping the cortex alert and conscious and enhancing its excitability?
Answer:
Reticular formation
Explanation:
The reticular formation is the netlike region and consists of interspersed gray and white matter. Reticular activating system (RAS) is a sensory part of the reticular formation and is responsible for consciousness. RAS of reticular formation obtains sensory information from eyes, ears, etc. Its projections into the cerebral cortex regulate sensory signals that reach the cerebrum.
RAS of reticular formation is responsible for keeping the cerebral cortex alert to maintain the attention of the individuals. The projections of the sensory part of reticular formation also regulate the excitability of cerebral cortex by releasing acetylcholine and noradrenaline (the excitatory neurotransmitters).
Radiation is a frequent method of sterilization. It is effective because it causes damage to DNA. However, prions, the agents that cause diseases such as mad cow disease, are unaffected by these treatments because they lack DNA. What is the definition of a prion?View Available Hint(s)Radiation is a frequent method of sterilization. It is effective because it causes damage to DNA. However, prions, the agents that cause diseases such as mad cow disease, are unaffected by these treatments because they lack DNA. What is the definition of a prion?Prions are proteins folded into the correct configuration.Prions are small RNA molecules that do not encode proteins.Prions are proteins that are folded incorrectly.Prions are small carbohydrate molecules that do not encode DNA.
Prions are proteins that are folded incorrectly.
Control of temperature, endocrine activity, and thirst are functions associated with the ________.
(A) medulla
(B) cerebellum
(C) hypothalamus
(D) thalamus
Answer:
C. Hypothalamus
Explanation:
Also known as the "thirst center", the hypothalamus controls the autonomic functions like hunger. It regulates temperature and it also holds the "master gland" or otherwise known as the pituitary gland. The pituitary gland controls the functions of the other endocrine glands.
The best answer would be the hypothalamus.
The hypothalamus in the brain controls temperature, endocrine activity, and thirst. It links the nervous system to the endocrine system and plays a significant role in maintaining homeostasis.
Explanation:Control of temperature, endocrine activity, and thirst are functions primarily associated with the hypothalamus. This part of the brain is like a command center, directly regulating many different body functions. The hypothalamus connects the nervous system to the endocrine system via the pituitary gland, playing a crucial role in maintaining the body's homeostasis.
For example, it helps regulate body temperature by triggering sweat when you're hot or shivering when you're cold. For thirst control, the hypothalamus monitors the concentration of blood and initiates drinking behavior when it's too concentrated.
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Which of the following is a positive effect that cities have on the environment? a. Garbage from New York is distributed to Kentucky to fill up abandoned mines. b. Concentrating people in cities contains water and air pollutants, which are removed by greenbelts. c. Cities give people places to live with smaller land use. d. Air pollution from the Midwest and "Rustbelt" states is exported to the northeastern United States and Canada.
Answer:
Cities give people places to live with smaller land use. -c.
C). Cities give people places to live with smaller land use
Explanation:The reason why answer choice "C). Cities give people places to live with smaller land use" is the correct answer is because cities allow a higher population without using so much land.
Cities are more populated than rural areas, that's because cities can hold more people in it than in rural places.
In cities, you would typically see more buildings that are getting taller, which allows the building to accommodate more people in it. Buildings that are getting higher could have more people in it than homes that take up more land for a small home.
Rural areas would typically have more homes that take up more land, due to the fact that the homeowners would own most of the land around it. The homes in rural areas are mostly occupied by a family, not allowing more people to live in it.
This is the reason why the population density is higher in cities than in rural areas.
I hope this helps you out.Good luck on your academics.Have a fantastic day!An example of a mineral composed of isolated tetrahedra is the gemstone peridot. peridot is a member of the _____________ group, the largest group of minerals with isolated tetrahedron structure.
Answer:
An example of a mineral composed of isolated tetrahedra is the gemstone peridot. peridot is a member of the Olivine group, the largest group of minerals with isolated tetrahedron structure.
Twenty- five people developed symptoms of nausea, vomiting, and diarrhea three to six hours after attending a church picnic where they ate a ham and green bean casserole with cream sauce. The most likely cause of this case of food intoxication is:
Answer: the most likely cause of this case of food intoxication is Erythrogenic toxin.
Explanation:
Erythrogenic toxins are streptococcal pyrogenic exotoxins and are secreted by strains of the bacterium Streptococcus Pyogenes.
The likely cause of food intoxication at a church picnic with symptoms showing in 3-6 hours is Staphylococcal food poisoning, caused by toxins from Staphylococcus aureus, generally treated with oral rehydration therapy.
The most likely cause of food intoxication after attending a church picnic where attendees developed symptoms of nausea, vomiting, and diarrhea within three to six hours is Staphylococcal food poisoning.
This condition is caused by the ingestion of enterotoxins produced by Staphylococcus aureus when it grows in food, particularly in protein-rich foods like ham and cream sauces that are present in casseroles.
These toxins can cause the symptoms mentioned above and are typically resolved within 24 to 48 hours.
Risk factors include leaving food at temperatures below 60 °C (140 °F), which allows the bacteria to grow, and poor food handling practices.
Oral rehydration therapy is important for treatment of dehydration caused by the resulting diarrhea.
Which statement about life on Earth is true? a)Dinosaurs appeared before insects. b)Dinosaurs and insects appeared at the same time. c)Humans have been on Earth for hundreds of millions of years.d) Humans have been on Earth for a very short amount of time.
Humans have been on Earth for a very short amount of time is true about life on earth.
Dinosaurs and Insects appeared in the Devonian period which translates to
around 160 million years ago while humans has existed on earth for about 3
million years.
When doing comparison of life of humans on earth with insects, dinosaurs
and when life on earth came into existence which is about 4500 million years we will observe that Humans have been on Earth for a very short amount of time.
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The different types of muscle tissue differ from each other by
The different types of muscles tissues that are differ from each other is anatomy, microscopic, location and type of control.
What are the functions of muscle tissues?Muscles are the largest soft tissues of the musculoskeletal system. Muscle is derived from the Latin word “musculus” meaning “little mouse”. The muscle cell, muscle fibre, contains protein filaments of actin and myosin that slide past one another, producing contractions that move body parts.
The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striped (striated), and are under involuntary control.
Smooth muscle tissue is non-striated and involuntary. Smooth muscle is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels.
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Which neurotransmitter would you expect to see in high quantities, if you could, in the brain of someone who has just been rewarded with a large raise in salary for all his or her hard work?
A. Acetylcholine
B. Serotonin
C. Epinephrine
D. Dopamine
Answer:
The correct answer would be option D. dopamine.
Explanation:
Dopamine is a catecholamine neurotransmitters produce from tyrosine. It plays a role in different pathways, is involved in many pathological conditions including the reward circuit, and addiction.
Dopamine is attached to reward center, so if you feel interested or excited for anything, then the levels of dopamine will increase in the prefrontal cortex. High level of dopamin motivates brain to remember facts or incidents presented to one.
Thus, the correct answer would be option D. dopamine.
The process of chromosome reduction occurs during:
fertilization
simple cell division - mitosis
meiosis
mutation
Answer: It occurs during meiosis
Explanation: because during that process there is a reduction of the number of chromosomes to the half, that is to say, from diploid cells (ex: 46 chromosomes in the human being) it will result haploid cells called gametes (23 chromosomes). That is: there is a reduction of genetic material during meiosis.
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I hope it is useful for you!. Maria
Answer:
It occurs during meiosis
For each molecule of glucose processed during glycolysis, the net yield is ________.
Answer:
For each molecule of glucose processed during glycolysis, the net yield is two molecules of NADH, two of ATP, and two of pyruvate.
Answer:
Two molecules of NADH, two of ATP, and two of pyruvate.
Explanation:
For each molecule of glucose processed during glycolysis, the net yield is two molecules of NADH, two of ATP, and two of pyruvate.
Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?1 breaking down ATP, so that ADP and P can be reused2. producing complex molecules from chemical building blocks3 the breakdown of glucose to carbon dioxide and water4 transforming the energy in glucose and related molecules in a chemical form that cells can use for work5 catabolism of sugars and related compounds
Answer:
4. transforming the energy in glucose and related molecules in a chemical form that cells can use for work
Explanation:
Glycolysis breaks down glucose into two molecules of pyruvate which is transformed into acetyl CoA to enter the Kreb's cycle. Kreb's cycle breakdown the acetyl CoA into CO2 and H2O. The energy stored in the glucose molecule is released during glycolysis and Kreb's cycle. The released energy is stored in the form of NADH and FADH2 as well as in few molecules of ATP.
The NADH and FADH2 enter the final step of cellular respiration, the oxidative phosphorylation. Here, NADH and FADH2 are oxidized with the help of electron transport chain (ETC). During the transfer of electrons through ETC, the proton motive force is generated which then helps in ATP synthesis.
Hence, the three steps of cellular respiration (glycolysis + Kreb's cycle + oxidative phosphorylation) retrieve the energy from nutrients such as glucose and store it in the form of ATP. ATP is used by cells as an energy source for various other functions.