Water is an excellent solvent for biological systems because
A) it can maintain a relatively unstable temperature for chemical reactions to occur.
B) compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water.
C) it is semisolid at body temperature, preventing it from flowing freely through the human body.
D) it can rearrange its bonds, forming covalent bonds with other molecules once dissolved.
B
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The bitter receptor hTAS2R38 is activated by glucosinolates found in plants such as turnips and broccoli. The gene variant a person has determines how sensitive their neurons are to these compounds. What would you predict for people who have the high-sensitivity variant of hTAS2R38?
Unlike sweet, salty, sour, or umami, the "bitter" category of tastants includes wide structural variety of detected molecules. Multiple receptors are required to sense the different bitter tastants. What do they have in common? Bitter taste is thought to have evolved as a warning system for toxic compounds. A. They will not easily digest turnips and broccoli. B. They will have to eat more turnips and broccoli to get the same flavor. C. They will dislike turnips and broccoli. D. They will become allergic to turnips and broccoli. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about taste receptors? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following would you likely find for the amino acids that are part of a protein that is embedded within the lipid bilayer?
What will be an ideal response?
Within a genome, an enhancer may be located
A) upstream of the gene enhanced. B) downstream of the gene enhanced. C) within the introns of other genes. D) proximal to the gene enhanced. E) upstream or downstream of the gene enhanced, even within the introns of other genes.
Which endocrine gland is directly responsible for the secretion of the glucocorticoid cortisol?
A. adrenal cortex B. hypothalamus C. thyroid gland D. adrenal medulla E. anterior pituitary