What is the main role of the pigment molecules within the antenna or light-harvesting complex?
A. Absorb photons and transfer light energy to the reaction center chlorophyll.
B. Oxidize water and release oxygen to the reaction center chlorophyll.
C. Synthesize NADPH.
D. Increase H+ concentration in the stroma.
E. Pass electrons to the electron transport chain and then to NADPH.
Answer: A
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The major histocompatibility complex is important in a T-cell's ability to:
A. recognize specific parasites. B. recognize specific bacteria. C. recognize specific viruses. D. recognize self from nonself.
In a mammal's bloodstream, where would you expect to find oxygen? Select all correct
A. dissolved in blood plasma B. attached to the heme group of myoglobin in red blood cells C. attached to the heme groups of hemoglobin in red blood cells D. attached to the heme group of myosin in red blood cells E. dissolved in hemolymph
Which of the following is an advantage of the bird
and mammalian circulatory system? a. It is closed. b. It is fully divided into two circuits. c. There is no mixing of oxygen-poor and oxygenated blood. d. Blood is directly pumped out to body capillaries after oxygenation in the lungs. e. All of these are an advantage.
A species that consumes only animal tissue is called a(n) ________
Fill in the blank(s) with correct word