Most of the significant changes in activities and functions that accompany passage through a cell cycle checkpoint are regulated by the:
A. activation of microtubules.
B. changes in membrane polarization.
C. activation of kinase enzymes.
D. activation of DNA polymerase.
E. inhibition of cyclin proteins.
C
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The Calvin cycle
A) is responsible for the fixation of CO2 into cell material. B) utilizes both NAD(P)H and ATP. C) requires both ribulose bisphosphate carboxylase and phosphoribulokinase. D) uses CO2, NAD(P)H, and ATP to make biomass with ribulose bisphosphate carboxylase and phosphoribulokinase.
A typical human body has ____ skeletal muscles
a. 78 b. 168 c. 206 d. 417 e. over 600
All animal cells contain the same type and quantity of organelles?
a. true b. false
ATP
a. can be produced by photosynthesis. b. is produced in the degradation of organic compounds such as glucose. c. is generated in anaerobic respiration. d. is formed in aerobic respiration. e. does all of these.