The NADPH required for the Calvin cycle comes from
A) reactions initiated in photosystem I.
B) reactions initiated in photosystem II.
C) the citric acid cycle.
D) glycolysis.
E) oxidative phosphorylation.
Ans: A) reactions initiated in photosystem I.
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Leprosy is caused by a microbe of the genus ________.
A. Mycobacterium B. Streptococcus C. Chlamydia D. Staphylococcus
Based on the pollen to ovule ratios, which statement appears to be true?
a. Species A probably distributes its pollen via the wind. b. Species B probably distributes its pollen via the wind. c. The pollen from species B is probably distributed by animals. d. Both species probably distribute their pollen via the same method
The exchange of gases between an organism and its environment is known as:
a. exhalation. b. aeration. c. inhalation. d. respiration. e. ventilation
Identify the true statement about exotoxins.
A. They are structural proteins on the exterior surface of bacteria. B. They nonspecifically activate host complement and coagulation cascades. C. They bind to specific receptors on host cells. D. They promote bacterial adhesion