Cancer-causing substances that mutate DNA are known as ____________________. Fill in the blank(s) with the appropriate word(s)
ANSWER: carcinogens
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The R-group, or side chain, of the amino acid serine is -CH2-OH. The R-group, or side chain, of the amino acid leucine is -CH2-CH-(CH3)2. Where would you expect to find these amino acids in a globular protein in aqueous solution?
A) Serine would be in the interior, and leucine would be on the exterior of the globular protein. B) Leucine would be in the interior, and serine would be on the exterior of the globular protein. C) Serine and leucine would both be in the interior of the globular protein. D) Serine and leucine would both be on the exterior of the globular protein.
The nitrogenous base that is only found in RNA and not DNA is:
A. adenine B. cytosine C. uracil D. guanine E. thymine
Answer the following statements true (T) or false (F)
1. Glucocorticoids (i.e., cortisol, prednisolone, dexamethasone) have a diverse number of functions. They include glucose mobilization during stress, development of lung tissue, and therapies to reduce inflammation. 2. Metamorphosis in flatfishes and in amphibians is controlled by growth hormone. 3. The nervous system integrates with the endocrine system to control hormone secretion. 4. The placenta develops from the endometrium while the fetus develops from embryonic tissue.
Which of the following organelles contains protein-digesting enzymes that break down proteins to amino acids?
A. chloroplasts B. lysosomes C. ribosomes D. mitochondria