Which structure is normally on the 5' end of a DNA strand?

A. nitrogenous base
B. hydroxyl group
C. sulfur group
D. phosphate group


Ans: D. phosphate group

Biology & Microbiology

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Andrew is studying bone development and calcium absorption in elephants. Which vitamin is

likely an important component of his study?

a. vitamin D b. vitamin A c. vitamin K d. vitamin B

Biology & Microbiology

Which type of ion channel is shown in this illustration?


a. voltage sensitive ion channel
b. light sensitive ion channel
c. mechanosensitive ion channel
d. temperature sensitive ion channel

Biology & Microbiology

During which phase of aerobic respiration is FADH2 produced?

a. glycolysis b. ethanol production c. acetyl-CoA formation d. the Krebs cycle e. glycolysis and the Krebs cycle

Biology & Microbiology

If you are cast up on a desert island with no fresh

water to drink, the level of which of the following will rise in your bloodstream in an effort to conserve water? a. erythropoietin b. oxytocin c. insulin d. antidiuretic hormone e. glucose

Biology & Microbiology