The C4 cycle ____

a. replaces the second stage of the Calvin cycle
b. supplements the activity of rubisco by providing a second source of 3PGA for the reduction stage of the
Calvin cycle
c. is more efficient than the Calvin cycle because less ATP is consumed in the process
d. ensures that CO2 is provided to rubisco and thus prevents photorespiration
e. is most commonly associated with plants living in humid climates


ANSWER: d

Biology & Microbiology

You might also like to view...

During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments he formulated a principle of 

A. niche overlap. B. exploitative competition. C. metapopulation fluctuation. D. competitive exclusion. E. interspecific competition.

Biology & Microbiology

The biological species concept declares an organism to be a separate species if it has undergone evolution long

enough for the emergence of statistically unique traits. _____________ Indicate whether the statement is true or false.

Biology & Microbiology

Pollutants such as ________ may affect the reproduction of organisms

A) carbon monoxide B) bisphenol A C) water D) nitrogen E) sulfur

Biology & Microbiology

The reaction phosphoenolpyruvate + ADP ? pyruvate + ATP (? G = -7.5 kcal/mole)

A. is an exergonic reaction. B. involves the transfer of energy from ATP to phosphoenolpyruvate. C. involves the transfer of a phosphate to phosphoenolpyruvate. D. is not spontaneous. E. is an endergonic reaction.

Biology & Microbiology