In order to elucidate the Calvin cycle, Calvin and his colleagues used two-dimensional paper chromatography to
analyze the presence of different molecules under different conditions. What did they conclude from the accumulation of
RuBP when CO2 levels were low?
a. RuBP only reacts with CO2 in the sunlight.
b. RuBP only reacts with CO2 when concentrations of ATP are low.
c. RuBP is the first substrate to react with CO2.
d. RuBP is the last substrate to react in the Calvin cycle.
e. CO2 serves as a non-competitive inhibitor of rubisco.
ANSWER: c
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a. metaphase I b. telophase I c. prophase II d. metaphase II e. anaphase II
Differential reproductive success is equivalent to:
a. evolution. b. competition. c. mutation. d. natural selection. e. adaptation.
In order to mount a response, particular B or T cells must express the appropriate ________ that will bind to the ________.
A) antigen : antibody B) antigen : antigen receptor C) epitope : antigen D) antigenic determinant : antigen E) antigen receptor : antigen
Green algae are assumed to be ancestors of plants because
A) green algae are almost exclusively marine. B) green algae make chitin and laminarin. C) the fossil ancestors have been discovered. D) lignin is known to occur in some green algae. E) green algae make cellulose and starch.