BS 161 Exam 3 ACTUAL UPDATED Questions and CORRECT Answers

BS 161 Exam 3 ACTUAL UPDATED
Questions and CORRECT Answers
Photosynthesis is the pathway used to synthesize carbohydrates from:


sunlight, CO2, and H2O.
CO2
O2.
sunlight.

sunlight, CO2, and O2. - CORRECT ANSWER -a


In the overall reactions of photosynthesis, the electrons from _____ are used to reduce _____.


H2O; CO2
O2; NADPH
O2; carbohydrates

H2O; carbohydrates - CORRECT ANSWER -a


Which one of the statements best represents the relationship between cellular respiration and
photosynthesis?


Cellular respiration occurs only in animals, and photosynthesis occurs only in plants.
Photosynthesis occurs only during the day, and cellular respiration occurs only at night.
Cellular respiration stores energy in organic molecules, whereas photosynthesis releases it.
Photosynthesis reverses the biochemical pathways of cellular respiration.
Photosynthesis stores energy in organic molecules, whereas cellular respiration releases it. -
CORRECT ANSWER -e

,Which of the answer choices is true when comparing the Calvin cycle and light-harvesting
reactions of photosynthesis?


They take place in different compartments of the same organelle.
None of the other answer options is correct.
They take place in different types of cells in the plant.

They take place in different organelles. - CORRECT ANSWER -a



where is light captured in the chloroplast - CORRECT ANSWER - thylakoid membrane


Which of the answer choices are products of the light-dependent reactions of photosynthesis that
are required by reactions in the Calvin cycle?


NADP+ and O2
ATP and O2
H2O and NADPH

ATP and NADPH - CORRECT ANSWER -d


Which of the answer choices correctly describes the role of rubisco in the Calvin cycle?


Rubisco incorporates CO2 from the atmosphere into an organic molecule.
Rubisco uses ATP to regenerate RuBP.
Rubisco uses NADPH to reduce 3-phosphoglycerate to a 3-carbon sugar.

None of the other answer options is correct. - CORRECT ANSWER -a


What is the initial carbon input in the Calvin cycle?


C6H12O6

,CO2
rubisco

triose phosphate - CORRECT ANSWER -b


Which step of the Calvin cycle would be affected first by a lack of NADPH?


regeneration
carboxylation
All of these choices are correct.

reduction - CORRECT ANSWER -d


In the Calvin cycle, ATP is required to:


reduce 3-PGA.
reduce RuBP.
donate a phosphate group to 3-PGA.
carboxylate RuBP.

reduce triose phosphates. - CORRECT ANSWER -c


Which of these molecules contributes to the energy that is stored in carbohydrate during the
Calvin cycle?


NADPH
sucrose
glucose
NADP+

ADP - CORRECT ANSWER -a

, Which of the sequences best represents the flow of energy through living systems?


CO2 → photosynthesis → carbohydrate → cellular respiration → ATP → heat
H2O → photosynthesis → carbohydrate → cellular respiration → ATP → CO2
light → photosynthesis → carbohydrate → cellular respiration →ATP → heat
light → photosynthesis → carbohydrate → cellular respiration → ATP → H2O
H2O → photosynthesis → carbohydrate → cellular respiration → ATP → H2O - CORRECT
ANSWER -c


The fluid-filled interior compartment of the thylakoid network is referred to as the:


cytoplasm.
stroma.
grana.
intermembrane space.

lumen. - CORRECT ANSWER -e


During photosynthesis in plants and algae, ____ is oxidized and ____ is reduced.


NADPH; ATP
H2O; O2
H2O; CO2
O2; CO2

CO2; H2O - CORRECT ANSWER -c


The enzyme called rubisco:


connects a 3-carbon molecule to a 5-carbon molecule.