Answer:
yum?
Explanation:
which arrow on the illustration represent the largest reservoir of nitrogen on earth
The side chain of ________ has a pka in the physiological ph range and is therefore often involved in proton transfer during enzymatic catalysis.
Final answer:
Histidine, with a pKa of around 7, is the amino acid whose side chain is most often involved in proton transfer during enzymatic catalysis due to its ability to exist in both protonated and deprotonated forms at physiological pH.
Explanation:
The side chain of histidine has a pKa in the physiological pH range and is therefore often involved in proton transfer during enzymatic catalysis. The pKa of the protonated histidine residue is approximately 7, which allows histidine to exist in both protonated and deprotonated forms within physiological conditions. This unique property makes it an ideal candidate to act as proton donor-acceptor groups in the active sites of enzymes. Histidine is commonly found in such roles in biochemical reactions because enzymes rely on the specific protonation states of amino acid residues to properly function.
Where is the start codon located? where is the start codon located? in the dna just upstream of where transcription starts at the upstream end of the 3' untranslated region (utr) at the downstream end of the 5' untranslated region (utr) at the very start (5' end) of the mrna?
What does your data indicate about the rate of cell division in cancerous tissue compared to the rate of cell division in normal tissue? what data did you use to answer this question?
unlike prokaryotic cells, ukaryotic cells have the capacity to
An established cereal manufacturer is being investigated by the ftc for claims that its oatmeal can repair damaged arteries and prevent heart disease. its executives are aware that if the claims are found to be false, the firm may receive the ftc's most severe penalty, which involves:
Hormones are secreted by exocrine glands directly into a body cavity or onto a body surface, rather than being transported by the blood. true or false?
Exocrine glands produce chemicals into ducts, which then deliver them to target tissues' surfaces. Therefore, the statement is true.
What are exocrine glands?A gland that secretes fluids, such as sweat, tears, saliva, milk, and digestive juices, through a duct or aperture that leads to the surface of the body. Sweat glands, lacrimal glands, salivary glands, mammary glands, and digestive glands in the stomach, pancreas, and intestines are all examples of exocrine glands. Exocrine glands are found throughout the body.
Both the liver and the pancreas are examples of exocrine and endocrine glands. Exocrine glands discharge compounds into the gastrointestinal system via ducts, such as bile and pancreatic juice. Endocrine glands, on the other hand, secrete substances directly into the bloodstream.
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According to the textbook, what role does the stomach play in feelings of hunger?
a. pressure receptors in the stomach walls signal fullness or emptiness.
b. fullness receptors and stomach contractions both play a role.
c. stomach contractions signal the brain that it is time to eat again.
d. pleasure receptors within the lower intestine, not the stomach walls, signal fullness or emptiness.
The stomach contributes to feelings of hunger through both fullness receptors and stomach contractions. When these receptors are not activated, due to an empty stomach, the feeling of hunger is experienced. However, pleasurable receptors in the lower intestine do not contribute to the signal of hunger, rather they signal satisfaction after eating.
Explanation:According to textbooks, the stomach plays a key role in the feelings of hunger via both fullness receptors and stomach contractions. When the stomach is empty, fullness receptors are not activated, which allows for the sensation of hunger. This is statement 'b' in your provided options. Additionally, physical stomach contractions also signal the brain that it's time to eat again, which can intensify feelings of hunger. The lower intestine does contain pleasurable receptors, but their role is mainly to signal satisfaction after eating, not hunger itself.
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Hunter-gatherer societies had the benefit of _____.
A. knowledge of the environment
B. sophisticated tools
C. good farming techniques
D. their understanding of germs
Answer: A
Hunter gatherer societies had the benefit of knowledge about the environment. This society includes the obtaining food from collecting wild plants and wild animals. They follow the wild animals for meat. They do not have knowledge of agricultural practices. They do not rely on agricultural societies. They do not have any understanding about germs.
Explain why it is necessary to incorporate buffers into media in whcih micororagnisms are grown
Final answer:
Buffers are necessary in media for growing microorganisms because they help maintain a stable pH. By incorporating buffers into the media, researchers can create an environment that supports the growth of microorganisms by providing optimal pH conditions for their survival and reproduction.
Explanation:
Buffers are necessary in media for growing microorganisms because they help maintain a stable pH. Microorganisms have specific pH requirements for growth, and fluctuations in pH can hinder their growth or even kill them. Buffers act as chemical stabilizers, minimizing changes in pH by absorbing excess hydrogen ions (H+) or hydroxide ions (OH-).
For example, in bacterial culture media, buffers like phosphate buffer or Tris buffer are added to maintain the pH within the optimal range for bacterial growth, typically around neutral pH.
By incorporating buffers into the media, researchers can create an environment that supports the growth of microorganisms by providing optimal pH conditions for their survival and reproduction.
Which layer of the eye completely surrounds the eye except for a dark, round opening called the pupil?
A)sclera
B)cornea
C)retina
D)choroid
Answer:
A)sclera
Explanation:
Toxins like α-amanitin are used for research in much the same way as null mutants−to disrupt a process and see what happens when it no longer works. researchers examined the ability of α-amanitin to inhibit different rna polymerases. they purified rna polymerases i, ii, and iii from rat liver, incubated the enzymes with different concentrations of α-amanitin, and then tested their activity. the results of this experiment are shown below. these findings suggest that α-amanitin-treated cells will have reduced levels
The right of workers to seek safety and health on the job without fear of punishment is spelled out in: A. Section 11 (c) of the OSH Act B. All state laws C. The General Duty Clause D. The Equal Employment and Opportunity Act
Answer:
Option A, Section 11 (c) of the OSH
Explanation:
In the Section Occupational Safety and Health Act of 1970 , also known as OSH Act employees are given protection against the termination of their job contract (job security on the mere issues of raising a health and safety issue with the employer or participating in inspection drill of OSHA, or complaining against the employer with OSHA team under the jurisdiction of OSHA Act.
Hence, option A is correct
When it came to explaining the origins of variation within species, darwin?
had no idea of the true causes.
in most cases the individuals who possess favorable traits are more likely to survive
Sienna decides to study movement in plants. Identify the correct sequence of the scientific steps, and place the steps in order. She developed a hypothesis that plants move toward light.Over six weeks, both plants grew toward their available light source. She put one plant near the window and another in a dark room with a small opening that let light come through.Every few days she checked the plants and recorded the direction of their growth.
Which biological molecule contains a large amount of the element nitrogen?
Answer:
the correct answer would be proteins !
Explanation:
In eukaryotes, the size of the primary transcript is generally ________ the gene in the template dna strand. see section 17.2 (page 353) .
How many different types of transport tissues do plants have?
In the deep waters of the ocean, coral reefs are found in abundance. Algae live on these coral reefs, providing nutrition and producing pigments that give color to the corals. The corals offer shelter to the algae. So, they share a association. Climate change has led to increased temperatures and has caused the corals to throw away the algae living inside them. This action causes the corals to be bleached because of a lack of pigment. This change will lead to . NextReset
In the deep waters of the ocean, coral reefs are found in abundance. Algae live on these coral reefs, providing nutrition and producing pigments that give color to the corals. The corals offer shelter to the algae. So, they share a mutualism association. Climate change has led to increased temperatures and has caused the corals to throw away the algae living inside them. This action causes the corals to be bleached because of a lack of pigment. This change will lead to a decrease .
Which of these things is the most contaminated with bacteria?
Toilet seat.
Kitchen sink.
The most bacteria is present in kitchen sink.
Explanation:In the place of kitchen sink there is an amount of around 100,000 times more bacteria as in comparison with the toilet seat. You should wash away the sink from hot water use for killing away the bacteria.
As humans have converted prairies to pastures and farms, prairie dogs have lost 98 percent of their habitat. Prairie dogs are the only food source for ferrets. What is likely to happen to ferrets if prairies continue to dwindle?
A. Ferrets are likely to become overpopulated.
B. Ferrets are likely to become extinct.
C. Ferrets are likely to become plant eaters.
D. Ferrets are likely to become farm animals.
The correct answer is option B, that is, ferrets are likely to become extinct.
Ferrets are dependent completely on the prairie dogs for food and the construction of their homes. Thus, with the spontaneous loss of prairie dogs, the population of ferrets will also get a reduction. The black-foot ferret refers to a nocturnal stalker whose destiny is somewhat associated with that of the prairie dog. The ferrets feed on insects, mice, birds, ground squirrels, and it lives in the burrows built by prairie dogs, which are also its main prey.
However because of the generation of pastures and farms, and massive hunting, and poisonous campaigns against the prairie dogs, which are the prime food source for ferrets are also making the ferret population to decline.
The most leaching of minerals occurs from the ____________________ horizon into the ____________________ horizon.
*For animal anatomy* The diaphragm is ______ to the stomach. a) dorsal b) rostral c) ventral d) cranial
The correct anatomical term for the position of the diaphragm in relation to the stomach is dorsal, meaning it is nearer to the back or spine side of the body.
Explanation:In terms of animal anatomy, the correct positional term for the relationship between the diaphragm and the stomach would be dorsal. The diaphragm is dorsal to the stomach. This means that the diaphragm is toward the back, or spine side of the body when compared to the position of the stomach. Other options like rostral, ventral and cranial don't correctly describe this anatomical relationship. Rostral refers to the towards the head end, ventral indicates towards the belly side and cranial refers to towards the skull or head.
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The water lost during transpiration is a side effect of the plant's exchange of gases. however, the plant derives some benefit from this water loss in the form of question 7 options:
a.mineral transport
b.evaporative cooling
c.evaporative cooling and mineral transport
d.increased turgor save
What would occur if you forgot to add dntps to your pcr sample?
brittle solid dull or shiny poor thermal conductor may conduct electricity ductile The properties listed here should be added to the section of the Venn diagram in the center, where you see the asterisk. What would be the title for this section? A) alloy B) metalloid C) faux metal D) rare Earth element
are sea slugs slowly becoming what they eat
Larry has an extremely stressful job and comes home every day with an upset stomach and a headache. he says he'll just have to deal with it for now, so he takes aspirin and stomach acid reducers on a daily basis. larry is in the ___________ stage of the general adaptation syndrome (gas).
Answer:
resistance stage
Explanation:
Structurally, vertebrae form __________ joints connected by intervertebral discs.
Earthquakes and volcanic eruptions are examples of rapid events that are caused by the movement of Earth's _______. Mountain building is a much more slow process, which is caused by the movement of Earth's _______.
Answer:
Crustal plates; crustal plates
Explanation:
Geology considers that the mountains are recent formations, so they did not suffer as much wear and tear through exogenous relief modification agents as the action of winds and rains. The mountains are commonly formed by the action of crustal plates (or tectonic plates), which collide and generate folds or uplifts on the surface.
Most volcanic eruptions and earthquakes are the result of tectonic plate movement. When they recede or collide, magma tends to rise in the case of volcanoes, or the earth tends to tremble in the case of earthquakes. Depending on the force of the pressure exerted, the volcano is "uncapped" and erupts.