Which of the following makes a molecule of DNA from a DNA template?
a. DNA polymerase
b. RNA polymerase
c. helicase
d. RNA primer
Ans: a. DNA polymerase
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Unlike other gymnosperms, gnetophytes have which of the following?
a. vessel elements in their xylem b. separate male and female gametes c. seeds exposed on modified leaves d. small spores that germinate
Refer to Figure 4-2. The cellular structure indicated by the arrow is responsible for:a
lipid and fatty acid metabolism.
b. protein synthesis.
c. digestion of unused organelles.
d. replication.
e. cellular respiration
The plasma membrane Na+/K+-ATPase pump
A. is a symporter. B. is used to generate sodium and potassium gradients across the membrane. C. does not require ATP. D. is a pump for facilitated diffusion of K+ into the cell and Na+ out of the cell. E. is a pump for active transport of K+ out of the cell and Na+ into the cell.
The light reactions of photosynthesis generate high-energy electrons, which end up in __________. The light reactions also produce __________ and __________.
Fill in the blank(s) with the appropriate word(s).