PCB 3023 exam 3 quizzes with verified
answers
Photosynthesis is a process that takes place in chloroplasts and uses light energy to generate high-
energy electrons, which are passed along an electron-transport chain. Where are the proteins of the
electron-transport chain located in chloroplasts? - correct answer thylakoid membrane
Stage 2 of photosynthesis, sometimes referred to as the dark reactions, involved the reduction of co2
to produce organic compounds such as sucrose. What cofactor is the electron donor for carbon
fixation? - correct answer NADPH
The photosystems in chloroplasts contain hundreds of chlorophyll molecules, most of which are a
part of - correct answer the antenna complex
In the electron-transport chain in chloroplasts, ___________-energy electrons are taken from
___________ - correct answer low; H2O
In stage 1 of photosynthesis, a proton gradient is generated and ATP is synthesized. Where do
protons become concentrated in the chloroplast? - correct answer thylakoid space
What is the role of the nuclear localization signal in a nuclear protein? - correct answer It is bound by
cytoplasmic proteins that direct the nuclear protein to the nuclear pore
Your friend works for a biotechnology company and has discovered a drug that blocks the ability of
Ran to exchange GDP for GTP. What is the most likely effect of this drug on nuclear transport? -
correct answer Nuclear transport receptors would be unable to release their cargo in the nucleus
Which of the following choices reflects the appropriate order of locations through which a newly
synthesized protein destined for the plasma membrane travels? - correct answer ER-> Golgi-> plasma
membrane
Which of the following statements about disulfide bond formation is FALSE? - correct answer
Disulfide bonds form spontaneously within the ER because the lumen of the ER is oxidizing
answers
Photosynthesis is a process that takes place in chloroplasts and uses light energy to generate high-
energy electrons, which are passed along an electron-transport chain. Where are the proteins of the
electron-transport chain located in chloroplasts? - correct answer thylakoid membrane
Stage 2 of photosynthesis, sometimes referred to as the dark reactions, involved the reduction of co2
to produce organic compounds such as sucrose. What cofactor is the electron donor for carbon
fixation? - correct answer NADPH
The photosystems in chloroplasts contain hundreds of chlorophyll molecules, most of which are a
part of - correct answer the antenna complex
In the electron-transport chain in chloroplasts, ___________-energy electrons are taken from
___________ - correct answer low; H2O
In stage 1 of photosynthesis, a proton gradient is generated and ATP is synthesized. Where do
protons become concentrated in the chloroplast? - correct answer thylakoid space
What is the role of the nuclear localization signal in a nuclear protein? - correct answer It is bound by
cytoplasmic proteins that direct the nuclear protein to the nuclear pore
Your friend works for a biotechnology company and has discovered a drug that blocks the ability of
Ran to exchange GDP for GTP. What is the most likely effect of this drug on nuclear transport? -
correct answer Nuclear transport receptors would be unable to release their cargo in the nucleus
Which of the following choices reflects the appropriate order of locations through which a newly
synthesized protein destined for the plasma membrane travels? - correct answer ER-> Golgi-> plasma
membrane
Which of the following statements about disulfide bond formation is FALSE? - correct answer
Disulfide bonds form spontaneously within the ER because the lumen of the ER is oxidizing
