Refer to Figure 40-1. Which of the following structures contributes to protecting the skin from the
effects of UV irradiation?
a. 3
b. 5
c. 7
d. 10
e. 11
B
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The amino acids of a growing polypeptide chain are held together by what kind of bond during the elongation stage of translation?
A. hydrogen B. peptide C. glycosidic D. noncovalent E. lactose
Describe the open-ocean planktonic food chain, and elaborate on why its supports few large animals
What will be an ideal response?
Which of the following cells conduct sugars and other organic solutes?
a. tracheids b. vessel elements c. companion cells d. sieve elements e. xylem
For glycolysis to begin, ____
a. glucose must enter the mitochondria b. there must be an input of energy from ATP c. oxygen must be available d. some hydrogen acceptors must be available e. there must be an input of energy from ADP