In HIV, RNA is transcribed to DNA by:
A. matrix.
B. reverse transcriptase.
C. surface glycoprotein.
D. capsid.
E. integrase.
B
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Pepsin, a digestive enzyme that degrades proteins in the stomach, is synthesized as pepsinogen and converted to active
pepsin in the stomach by the removal of several amino acids. The activation of pepsin is an example of ____.
a. transcriptional regulation b. translational regulation c. posttranscriptional regulation d. posttranslational regulation e. RNAi
Write the letter of the region expected to have the highest population by 2025 next to 1, the letter of
the region expected to have the lowest population by 2025 next to 6.
A. Europe B. Asia C. Latin America D. North America E. Africa 1. 2. 3. 4. 5.
Blood vessels that return blood from capillaries back to the heart are
a. arteries. b. veins. c. portal veins. d. arterioles.
The semifluid matrix that surrounds organelles in a cell is called the:
A. cytoplasm. B. nucleoplasm. C. ribosome. D. stroma.