Which of the following enzyme and its function is mismatched?
A. Reverse Transcriptase-DNA synthesis
B. RNA polymerase-synthesizes tRNA
C. RNA polymerase-exonuclease activity
D. DNA polymerase--proof-reading d. DNA polymerase-exonuclease activity
Ans: C. RNA polymerase-exonuclease activity
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Which of the following statements about ocean acidification is false?
A. Ocean acidification increases the availability of carbonate ions in seawater. B. Increasing levels of CO2 in the ocean cause a decrease in the pH of seawater. C. The pH of surface oceans has dropped by 0.1 units in the past 40 years. D. Ocean acidification makes it more difficult for corals to secrete their skeletons. E. Ocean acidification is predicted to get worse as atmospheric CO2 levels rise.
The brain and nervous system of a developing embryo can only be damaged during the very early stages of
development. a. True b. False
Dietary treatment of galactosemia ____
a. need not begin until one or two months after birth b. consists of very low protein intake c. can usually be discontinued by the age of twelve d. completely eliminates symptoms of the disease e. should be started within a few days after birth
A newly synthesized polypeptide will ultimately be located within the phospholipid bilayer of the plasma membrane. When this polypeptide folds to form its tertiary structure, the ________ amino acid R-groups will most likely be facing outward.
A. hydrophobic B. hydrophilic