BIO 112 EXAM #3 Verified Exam Questions and Answers Latest
update 2026/2027
Question:
The stacks of membrane inside the chloroplast are called the ______, and the fluid surrounding the
stacks of membrane is called the ______.
Answer:
grana; stroma
Question:
hat role does the Calvin cycle play in photosynthesis?
Answer:
it BUILDs organic molecules
Question:
The synthesis portion of photosynthesis is sometimes referred to as fixation; that is, the gas CO2 is
"fixed" into an organic molecule. Of the four major types of organic molecules, into which is CO2
first fixed?
Answer:
carbohydrate
Question:
ow does G3P relate to glucose?
Answer:
G3P is released from the Calvin cycle and can be converted to glucose.
Question:
Both photosynthesis and cellular respiration rely on electron carrier molecules to provide electrons to
ultimately help produce ATP. In photosynthesis the source of electrons is ______, and in cellular
respiration the source of electrons is ________.
Answer:
water; glucose
Question:
Water provides the necessary _____________ to allow for the light reactions to occur.
Answer:
electrons
,Question:
During the Calvin cycle, the enzyme rubisco is responsible for the splitting of the five-carbon
compound RuBP (which has been combined with carbon dioxide) into two molecules of the
three-carbon compound _____.
Answer:
PGA
Question:
Which of the following is an end product of photosynthesis?
Answer:
oxygen
Question:
The thousands of pores lining a leaf that allow for gas exchange in plants are known as __________.
Answer:
stomata
Question:
What are the principal raw materials for photosynthesis? Selected Answer:
carbon dioxide and glucose - wrong
Answer:
carbon dioxide and water ?? A detrimental mutation in the rubisco gene would cause the inability of
the plant to ____________. Selected Answer:
Question:
produce NADPH - wrong
Answer:
fix carbon???
Question:
Why does photorespiration pose a major problem for plants?
Answer:
It causes the Calvin cycle to run without fixing carbon, wasting energy.
Question:
The total elimination of which of the following substances would NOT interfere with the process of
photosynthesis?
Answer:
Oxygen
, Question:
The energy to run the Calvin cycle is produced _________.
Answer:
during the light reactions of photosynthesis
Question:
Which of the following is part of the Calvin cycle? selected answer breaking down G3P - wrong
Answer:
carbon fixation???
Question:
On hot, dry days, C3 plants close their stomata. The purpose of this for the plant is to ______;
however, this can result in ______.
Answer:
decrease transpiration (evaporative water loss); photorespiration
Question:
The primary pigment active in plant photosynthesis is known as_______.
Answer:
chlorophyll a
Question:
Which of the following is the function of water in photosynthesis?
Answer:
to provide electrons to the light reactions
Question:
What is CAM photosynthesis?
Answer:
a method of photosynthesis that minimizes the loss of water by "banking" CO2 at night.
Question:
What is the ultimate source of energy for nearly all living things on Earth? Selected Answer:
green plants - wrong
Answer:
the sun??
update 2026/2027
Question:
The stacks of membrane inside the chloroplast are called the ______, and the fluid surrounding the
stacks of membrane is called the ______.
Answer:
grana; stroma
Question:
hat role does the Calvin cycle play in photosynthesis?
Answer:
it BUILDs organic molecules
Question:
The synthesis portion of photosynthesis is sometimes referred to as fixation; that is, the gas CO2 is
"fixed" into an organic molecule. Of the four major types of organic molecules, into which is CO2
first fixed?
Answer:
carbohydrate
Question:
ow does G3P relate to glucose?
Answer:
G3P is released from the Calvin cycle and can be converted to glucose.
Question:
Both photosynthesis and cellular respiration rely on electron carrier molecules to provide electrons to
ultimately help produce ATP. In photosynthesis the source of electrons is ______, and in cellular
respiration the source of electrons is ________.
Answer:
water; glucose
Question:
Water provides the necessary _____________ to allow for the light reactions to occur.
Answer:
electrons
,Question:
During the Calvin cycle, the enzyme rubisco is responsible for the splitting of the five-carbon
compound RuBP (which has been combined with carbon dioxide) into two molecules of the
three-carbon compound _____.
Answer:
PGA
Question:
Which of the following is an end product of photosynthesis?
Answer:
oxygen
Question:
The thousands of pores lining a leaf that allow for gas exchange in plants are known as __________.
Answer:
stomata
Question:
What are the principal raw materials for photosynthesis? Selected Answer:
carbon dioxide and glucose - wrong
Answer:
carbon dioxide and water ?? A detrimental mutation in the rubisco gene would cause the inability of
the plant to ____________. Selected Answer:
Question:
produce NADPH - wrong
Answer:
fix carbon???
Question:
Why does photorespiration pose a major problem for plants?
Answer:
It causes the Calvin cycle to run without fixing carbon, wasting energy.
Question:
The total elimination of which of the following substances would NOT interfere with the process of
photosynthesis?
Answer:
Oxygen
, Question:
The energy to run the Calvin cycle is produced _________.
Answer:
during the light reactions of photosynthesis
Question:
Which of the following is part of the Calvin cycle? selected answer breaking down G3P - wrong
Answer:
carbon fixation???
Question:
On hot, dry days, C3 plants close their stomata. The purpose of this for the plant is to ______;
however, this can result in ______.
Answer:
decrease transpiration (evaporative water loss); photorespiration
Question:
The primary pigment active in plant photosynthesis is known as_______.
Answer:
chlorophyll a
Question:
Which of the following is the function of water in photosynthesis?
Answer:
to provide electrons to the light reactions
Question:
What is CAM photosynthesis?
Answer:
a method of photosynthesis that minimizes the loss of water by "banking" CO2 at night.
Question:
What is the ultimate source of energy for nearly all living things on Earth? Selected Answer:
green plants - wrong
Answer:
the sun??
