Why does the efficiency of sugar production decrease when stomata are closed in C3 plants?
a. Accumulated oxygen outcompetes carbon dioxide for rubisco's active site.
b. Depleted carbon dioxide outcompetes oxygen for rubisco's binding site.
c. Accumulated oxygen inhibits rubisco's function.
d. Depleted carbon dioxide inhibits rubisco's function.
e. Depleted carbon dioxide activates rubisco's function.
ANSWER: a
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What must be true when electrons are passed between protein complexes?
a. Electrons are directly passed from one complex to the next by physical contact. b. The oxidized electron carrier passes on the electron and becomes reduced. c. A proton is translocated to the inner mitochondrial space. d. The matrix decreases in pH. e. The reduced electron carrier passes on the electron and becomes oxidized.
Which of these are symbioses?
What will be an ideal response?
Evaporation
What will be an ideal response?
Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function B) a drug that disrupts cell wall structure and function C) a drug that destroys the central vacuole D) a drug that blocks gene expression in circular chromosomes