In the light-dependent reactions of photosynthesis, an excited electron from photosystem II is passed
along an electron transport chain to ___________.
a. NAD+
b. NADH
c. photosystem I
d. oxygen
e. water
C
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The primary pacemaker of the heart is the
(a) bicuspid valve. (b) tricuspid valve. (c) aorta. (d) sinoatrial node.
Which of the following variables is part of the Michaelis—Menten equation?
A) kcat B) Km C) Vmax D) [S] E) v
An important requirement for appropriate inoculum preparation in susceptibility testing includes the use of a(n):
a. pure culture. b. single isolated colony. c. variety of colony morphotypes. d. inoculum equivalent to the bacterial bur-den at the site of infection.
The intercellular spaces between plant cells
a. contain air. b. are responsible for cytoplasmic streaming. c. produce energy for the cell. d. contain chloroplasts.