BIO 121 Unit 3 Exam Questions and
Correct Answers
What process is most directly driven by light energy? ✅Removal of electrons from
chlorophyll molecules
True or False: plants require no more than energy and a carbon source to make their
food ✅False
Which color has the greatest energy? ✅Blue
A pigment absorbs a photon only if the energy of the photon is... ✅exactly enough to
boost an electron of the pigment to a higher energy level
During the first phase of the Calvin Cycle, carbon dioxide is incorporated into RuBP by
✅Rubisco
What occurs in the light-dependent reactions of photosynthesis? ✅Oxygen is released
ATP is produced
Water is broken down
NADP+ is reduced
Where does the oxygen released in photosynthesis come from? ✅Water
What are the products of the light-dependent reactions that are used in the light-
independent reactions? ✅NADPH
Protons
Electrons
ATP
The aerobic respiration process ends in what area of the eukaryotic cell?
✅Mitochondria
The breakdown of glucose produces the most ATP in which metabolic process?
✅Aerobic respiration
What happens when molecules are broken apart in respiration? ✅The energy released
in respiration is channeled into molecules of ATP
What does glycolysis depend on the continuous supply of? ✅glucose
NAD+
Correct Answers
What process is most directly driven by light energy? ✅Removal of electrons from
chlorophyll molecules
True or False: plants require no more than energy and a carbon source to make their
food ✅False
Which color has the greatest energy? ✅Blue
A pigment absorbs a photon only if the energy of the photon is... ✅exactly enough to
boost an electron of the pigment to a higher energy level
During the first phase of the Calvin Cycle, carbon dioxide is incorporated into RuBP by
✅Rubisco
What occurs in the light-dependent reactions of photosynthesis? ✅Oxygen is released
ATP is produced
Water is broken down
NADP+ is reduced
Where does the oxygen released in photosynthesis come from? ✅Water
What are the products of the light-dependent reactions that are used in the light-
independent reactions? ✅NADPH
Protons
Electrons
ATP
The aerobic respiration process ends in what area of the eukaryotic cell?
✅Mitochondria
The breakdown of glucose produces the most ATP in which metabolic process?
✅Aerobic respiration
What happens when molecules are broken apart in respiration? ✅The energy released
in respiration is channeled into molecules of ATP
What does glycolysis depend on the continuous supply of? ✅glucose
NAD+
