how are proteins built using the information provided by a molecule of RNA ?
During translation, the information to build the RNA comes from messenger RNA (mRNA)
Answer:
RNA determines the sequence of amino acids in proteins and polypeptides by a two-step process: transcription of DNA produces mRNA in the nucleus, then translation of the mRNA to tRNA takes place in the ribosome in the cytoplasm.
The head of a giraffe is 2.0 m above its heart and the density of the blood is 1.05 103 kg/m3. what is the difference in pressure between the giraffe's heart and head? (fortunately, a giraffe's neck has a special circulatory system to adapt to this neck length, producing an even flow of blood to the head.)
The difference in pressure between the giraffe's heart and head is :
20.58 kPa Position of Giraffe head in relation to its heartGiven that the head of the giraffe head is placed at a higher position the blood pressure in the head will be higher than the blood pressure in the heart. and
Pressure in the Giraffe is directly related to ; density , gravity and height of the giraffe
Therefore pressure = ρ*g*h
= 1.05 * 10³ * 9.8 * 2
= 20580 pa = 20.58 kPa
Hence we can conclude that the difference in pressure between the giraffe's heart and head is 20.58 kPa.
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What creates a magnetic field?
A magnetic field is created by moving electrical charges. Thus, the correct option for this question is B.
What do you mean by Magnetic fields?The magnetic field may be defined as a type of vector field that significantly describes the influence of a magnet on moving electric charges, electric currents, and magnetic materials. It involves the force of magnetism across it.
The magnetic field is generally produced by the action of magnet or electric charges in motion. The magnetic field has defined as a region around a magnetic material or moving electric charge through which the force of magnetism significantly acts over it. Magnetic fields are illustrated by utilizing magnetic field lines.
Therefore, a magnetic field is created by moving electrical charges. Thus, the correct option for this question is B.
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Vascular plants, like this one, take in water through the roots. How does the water get to the leaves, where photosynthesis happens?
All cells contain a phosphate buffer system within their internal fluid to help maintain a constant pH. This system can be summarized by the following chemical equation: H2PO4- (aq) H+ (aq) + HPO4-2 (aq) This system mostly contributes to which of the following cellular activities?
A.
maintaining homeostasis
B.
reproduction
C.
acquiring energy
D.
natural selection
The phosphate buffer system is essential for maintaining homeostasis by regulating the pH within cells, ensuring optimal functioning of the body.
The phosphate buffer system within cells plays a critical role in maintaining homeostasis by regulating the acid-base balance and ensuring a stable internal pH. The chemical equation H₂PO₄₋ (aq) H+ (aq) + HPO4₂₋ (aq) represents this buffer system, which is more active intracellularly and maintains a pH of 6.86. It is essential for proper physiological functioning, as it prevents a radical change in fluid pH by absorbing excess hydrogen or hydroxyl ions. This system is particularly vital since all body cells depend on a tightly regulated pH level to function correctly.
cells that perform a specific function in an organism
Answer:
Cells that perform a specific function:Cell serves as the basic building blocks for building the structure or the body of the living organisms. Now, certain type or specific number of cells come closer and arrange themselves in such a sequence that they need to perform a unique or specific task by making up a whole organ structure.
Explanation:
Example of cells that perform the specific function inside the living organisms body:There are certain cells inside the human body which makes up a single organ and then performs the whole function specifically by themselves, as we have the "myocardial myocytes". These are the specific type of cells which are required for the heart's cardiac muscles to develop or grow in a given pattern. As these cells are specialized for making up or building up of the cardiac muscles which in turns results in the heart structure. And performs the basic function of supply of blood and the required materials i.e nutrients to the different cells and organs.
The higher risk for breast cancer in obese women after menopause is thought to result mainly from chronic exposure of
Answer;
Estrogen
The higher risk for breast cancer in obese women after menopause is thought to result mainly from chronic exposure of Estrogen.
Explanation;
Being overweight is associated with increased risk of breast cancer, especially for women after menopause.
Fat tissue is the body's main source of estrogen after menopause, when the ovaries stop producing the hormone.
Describe the error in the conclusion. given: there is a linear correlation between the number of cigarettes smoked and the pulse rate. as the number of cigarettes increases the pulse rate increases. conclusion: cigarettes cause the pulse rate to increase.
Which other system in the body works closely with the kidneys to regulate arterial blood ph?
The correct answer is the respiratory system.
The pH of the extracellular fluids (blood) can be controlled by separately regulating the partial pressure of CO2, which determines the carbonic acid concentration via respiration and the bicarbonate ion concentration in the extracellular fluids via renal system. Control of the carbonic acid concentration in the blood is achieved by changes in the rate and depth of breathing. Breathing releases or retains CO2 (and thus carbonic acid) in the blood plasma and thus, changes its pH.
After replication, ____ identical molecules of _____ are produced. A gene is a sequence of _____ in a molecule.
True or False
The female determines the sex of mammals.
What three lifestyle factors decrease the risk of cardiovascular disease development?
In what way do the respiratory and circulatory systems depend on each other
The circulatory system consists of an entire network of blood cells that is being pumped in the entire body throughout and the respiratory system has the main function to exhale carbon dioxide and inhale oxygen for providing energy.
Both circulatory and respiratory systems work together for transportation of oxygen to all the organs and muscles of the body. The heart pumps the oxygen rich blood from lungs and excretes or disposes the waste in the blood to the lungs to breathe and exhale out of the body.
Answer:
Whatever the other guy said
Explanation:
Which of the following can be cofactors?
organic molecules
inorganic molecules
anions
cations
Answer:
The correct options are: organic molecules and cations
Explanation:
Cofactors are the non-protein ions or molecules that combine with the inactive enzyme, called the apoenzyme to form the holoenzyme.
Cofactors can be classified into two categories: 1. the inorganic ions or the metal ions and 2. the coenzymes.
Coenzymes are the complex organic molecules that are of two types: 1. the cosubstrate; 2. prosthetic group
Therefore, Cofactors can be either inorganic metal ions or organic molecules.
Coronary heart disease is caused by a buildup of plaque in the arteries that supply blood to the heart. when the flow of blood to the heart is restricted or blocked, the heart can be damaged due to a lack of oxygen. further, if a large piece of plaque buildup gets dislodged from an artery wall, it can get stuck in other arteries throughout the body, including arteries in the brain. for simplicity, let's assume that the artery is cylindrical with a radius of r. the flow rate of a viscous fluid is given by poiseuille's law q=(π/8)(δp/ηl)r4.
what chemical compound is crucial to marine life and how it is disappearing
The answer is nitrogen. It is usually regarded as a growth-limiting factor for primary producers such as phytoplankton. It is usually taken up in the ‘fixed’ form of ammonium. It is converted from dissolved nitrogen gas in ocean surface to a ‘fixed’ form by particular microbes. Due to increasing global temperatures, as a result of global warming, the ocean temperatures have increased hence oceans hold less dissolved oxygen than they used to. The low oxygen concentration in the oceans induces the loss of nitrogen from oceans through increased activity of micro-organisms that are significant in denitrification. This rate becomes higher than that of nitrification that fixes nitrogen in the oceans.
Why is research and development an integral part of the designing and producing process of an aerospace product?
Final answer:
Research and development (R&D) is essential in aerospace design and production due to the necessity for safety, efficiency, and continual innovation in complex systems such as airplanes, helicopters, and satellites. R&D efforts drive product and process improvements, leading to cost reductions and economic-wide benefits. Examples like HighFlyer Airlines illustrate the need for R&D in realizing specific design goals that can enhance profitability and passenger comfort.
Explanation:
Research and development (R&D) is an integral part of the designing and producing process of an aerospace product due to the industry's high stakes in safety, efficiency, innovation, and competition. The need for scientific research and continuous improvement is relentless, as it contributes to developing new products, technologies, or processes that can significantly enhance productivity and societal welfare. Aerospace products, such as airplanes, helicopters, rockets, satellites, and space shuttles, are complex systems that rely on cutting-edge technology and optimized design for their operation.
Aerospace engineers apply their knowledge of physics, math, and engineering to tackle challenges like designing safer, more comfortable, and efficient commercial aircraft. The role of R&D extends to both product development—creating new products and improving existing ones—and process development, which involves streamlining operations and manufacturing methods to reduce production costs. The dynamic and uncertain future of technology further emphasizes the criticality of R&D investments in positioning firms for success.
which of the following is true ? 1. All populations in an ecosystem form the community. 2. A habitat represents all the biotic factors in an ecosystem. 3. The amount of nutrients in soil is an example of a biotic factor. 4. Only one population can live in a habitat at a time
How does artificial selection differ from natural selection?
Natural selection is a nature-made selection, and artificial selection is a man-made selection. Natural selection is the work of nature itself and no human interaction is involve in this process. Plants and animals breed according to the flow of nature. While on the other hand artificial selection produces diversities of organisms such as improved crops and livestock.
16. In some species of balloon flies, males spin balloons of silk and carry them while flying. If a female approaches one of the males and accepts his balloon, the two will fly off to mate. This type of behavior is an example of (1 point) aggression. territorial defense. courtship. language.
The right option is Courtship
Courtship is a behavior in which different
species interact and select their partners for mating which leads to
reproduction. Most times, the female specie chooses the desired male to mate with before
copulation. Various behaviours such as display
of strength, dancing and vocal utterance are often used during courtship. For the question given above,the type of behavior displayed by the species of balloon flies is an example of courtship.
The right option is Courtship
Courtship is a behavior in which different
species interact and select their partners for mating which leads to
reproduction. Most times, the female specie chooses the desired male to mate with before
copulation. Various behaviours such as display
of strength, dancing and vocal utterance are often used during courtship. For the question given above,the type of behavior displayed by the species of balloon flies is an example of courtship. yw dawg
In this phase, chromosomes arrive at the poles and a nuclear envelope begins the develop around them:
Which type of heart failure would you suspect with m. k.? explain the pathogenesis of how this type of heart failure develops. include an overview of the disease and it's effects in the u.s. population?
________ disease involves the heart, peripheral vascular system and brain while_______ disease involves the eyes kidney, and large blood vessels.
Cardiovascular disease affects the heart, peripheral vascular system, and brain, while diabetic retinopathy often impacts the eyes and kidneys, alongside large blood vessels.
Cardiovascular disease is a class of diseases that involve the cardiovascular system, including diseases of the coronary arteries, carotid arteries, and peripheral arteries. It is known as the leading cause of death worldwide. Conditions like hypertension and atherosclerosis are common causes of cardiovascular diseases, which can lead to stroke and peripheral artery disease.
In ________, the interaction between two species harms both of them. coevolution competition mutualism parasitism symbiosis
In a _____________ wave, vibrations are perpendicular to the direction of the wave motion. In a _____________ wave, vibrations are parallel to the direction of the wave motion.
Answer:
1. Transverse wave
2. Longitudinal wave
Explanation:
In a transverse wave, vibrations are perpendicular to the direction of the wave motion. In a longitudinal wave, vibrations are parallel to the direction of the wave motion.
In the transverse wave, crest and trough are the parts of a wave. The crest is a part where the displacement is maximum. While the trough is the part where the displacement is minimum.
In the longitudinal wave, the compression and the rarefaction are the part of a wave. In compression, the particles are very close to each other. While, in rarefaction, the particles are far apart.
You traced a molecule of urea from the renal artery out of the body. how would the steps of this tracing differ if the urea were recycled
What was Gregor Mendel’s main contribution to science? A. He cultivated unusual flower species. B. He is considered the father of genetics. C. He researched the best-tasting peas. D. He proposed a theory of blended traits.
Gregor Mendel’s proposed the theory of blended traits which is considered as main contribution to science.
Answer: Option D
Explanation:
He experimented with the seven contrasting traits of the pea plant and came up with theories and laws pertaining to the segregation of characters. He noted that the F2 generation of the pea plant was having traits which were composed of dominant, recessive as well as new trait due to co-dominance.
What does the author mean when he refers to reverse engineering the brain?
a.studying brain activity by observing a person's actions
b.studying the electrical impulses of the brain and then comparing them to an average circuit board
c.studying the workings of the brain by disassembling its components and then reassembling them
d.studying the anatomic structure from the back of the brain to the front?
Which best describes a benefit of using DNA technology in medicine?
DNA technology contributes to personalized medicine by enabling treatments tailored to an individual's genetics, thereby revolutionizing drug dosing through pharmacogenomics. It facilitates early diagnosis and intervention for hereditary diseases and accelerates the drug discovery process by identifying disease-specific genetic targets.
One of the key benefits of using DNA technology in medicine is the potential for personalized medicine. With the sequence of DNA bases known, it becomes possible to tailor treatments to an individual's genetic makeup. This approach enhances the effectiveness of medications and reduces the risk of adverse drug reactions. For instance, pharmacogenomics, a field born from DNA technology, examines how genetic variations affect an individual's response to drugs, allowing for more precise and effective dosing. Additionally, DNA technology aids in the early diagnosis of hereditary diseases, potentially even before symptoms present, enabling prompt interventions. Another application of such technology is the discovery of novel drugs, which is made more efficient as researchers target specific genes and proteins involved in diseases.
Genomic knowledge is also very helpful for diagnosing various conditions, such as different types of cancer, cystic fibrosis, and Alzheimer's disease among others, by identifying linked mutations. Furthermore, the production of human insulin via recombinant DNA methods and the potential for gene therapy are examples of how DNA technology has already impacted medicine significantly. The Human Genome Project, in particular, has played a pivotal role in various medical advancements by providing comprehensive knowledge of the human genetic code.
Dinobryon is a species of protozoa that reproduces asexually. How can this asexual reproduction be harmful to the species?