BIO EXAM TEST UPDATED
QUESTIONS AND ANSWERS 2024/2025
What is the role of chlorophyll in plants? (CORRECT ANSWER)Chlorophyll captures
solar energy to produce plant energy
What provides electrons to replace chlorophyll's missing electrons in the light
reactions? (CORRECT ANSWER)H2O
Glycolsis ends with the formation of: (CORRECT ANSWER)Pyruvic acid
In the C3 pathway, where does the carbon from to form glucose? (CORRECT
ANSWER)Atmospheric CO2
If you find a leaf that appears very blue it reflects which color of light? (CORRECT
ANSWER)Blue
In plant cells, the pigments important in the manufacture of carbohydrates from
carbon dioxide and water contained in the: (CORRECT ANSWER)Cytoplasm
The actual production of sugars during photosynthesis takes place: (CORRECT
ANSWER)Within the stroma, outside the thylakoid, but still within the chloroplast
Glycolysis: (CORRECT ANSWER)Requires the presence of CO2
What is the purpose of a cuticle on a leaf? (CORRECT ANSWER)To prevent water
loss
Suppose you are studying photosynthesis in a research lab. You grow your plants in
a chamber with a source of water that has a radioactively labeled oxygen atom.
What photosynthetic product will be radioactive? (CORRECT ANSWER)O2 gas
Chlorophyll molecules are located in which part of the chloroplast? (CORRECT
ANSWER)Grana
A high concentration of H+ in the thylakoid compartments provides energy for the
________ by ________. (CORRECT ANSWER)Production of ATP; ATP synthase
Autotrophs that utilize light as their energy source are (CORRECT
ANSWER)Photoautotrophs
Light reactions produce (CORRECT ANSWER)ATP, NADPH, and O2
What transport hydrogen protons and electrons from the light reactions to the Calvin
Cycle? (CORRECT ANSWER)NADPH
Aerobic respiration takes place (CORRECT ANSWER)In both plants and animals
, The term "cycle" is used to describe the Calvin Cycle because: (CORRECT
ANSWER)The process begins and ends with RuBP (a five carbon sugar)
Cellular respiration is the process by which: (CORRECT ANSWER)Energy from the
chemical bonds of food molecules is released to an organism
Which of the following energy-generating processes is the only one that occurs in all
living organisms? (CORRECT ANSWER)Glycolysis
How is O2 involved in photosynthesis? (CORRECT ANSWER)O2 is a product of
light reactions
In photosynthesis, ATP is required during which of the following reactions?
(CORRECT ANSWER)Calvin Cycle only
All of the following are part of the Calvin Cycle EXCEPT: (CORRECT
ANSWER)Generation of ATP
Stomata are pores found in the leaves and stems of plants. What is their purpose?
(CORRECT ANSWER)Stomata open to allow gas exchange and close to prevent
the loss of water
Why do plant leaves appear green? (CORRECT ANSWER)The chlorophyll in leaves
reflect green light
All of the following compounds are necessary constituents for photosynthesis
EXCEPT: (CORRECT ANSWER)Oxygen
Cyclic photophosphorylation is called cyclic because: (CORRECT ANSWER)An
electron leaving a chlorophyll molecule returns to it
Why do chloroplasts make energy carriers during the light reactions? (CORRECT
ANSWER)To provide energy for the synthesis of sugar
Where does the synthesis of pyruvic acid occur during glycolysis? (CORRECT
ANSWER)Cytoplasm
Suppose you are studying photosynthesis in a research lab. You grow your plants in
a chamber with a source of CO2 that has radioactively labeled carbon atom. What
photosynthetic product will be radioactive? (CORRECT ANSWER)Glucose
Most carbon enters the web of life through: (CORRECT ANSWER)Photosynthesis
Which of the following is main purpose of cellular respiration? (CORRECT
ANSWER)Creation of energy
The light reactions take place in the _____ and Calvin Cycle takes place in the
______. (CORRECT ANSWER)Grana; stroma
QUESTIONS AND ANSWERS 2024/2025
What is the role of chlorophyll in plants? (CORRECT ANSWER)Chlorophyll captures
solar energy to produce plant energy
What provides electrons to replace chlorophyll's missing electrons in the light
reactions? (CORRECT ANSWER)H2O
Glycolsis ends with the formation of: (CORRECT ANSWER)Pyruvic acid
In the C3 pathway, where does the carbon from to form glucose? (CORRECT
ANSWER)Atmospheric CO2
If you find a leaf that appears very blue it reflects which color of light? (CORRECT
ANSWER)Blue
In plant cells, the pigments important in the manufacture of carbohydrates from
carbon dioxide and water contained in the: (CORRECT ANSWER)Cytoplasm
The actual production of sugars during photosynthesis takes place: (CORRECT
ANSWER)Within the stroma, outside the thylakoid, but still within the chloroplast
Glycolysis: (CORRECT ANSWER)Requires the presence of CO2
What is the purpose of a cuticle on a leaf? (CORRECT ANSWER)To prevent water
loss
Suppose you are studying photosynthesis in a research lab. You grow your plants in
a chamber with a source of water that has a radioactively labeled oxygen atom.
What photosynthetic product will be radioactive? (CORRECT ANSWER)O2 gas
Chlorophyll molecules are located in which part of the chloroplast? (CORRECT
ANSWER)Grana
A high concentration of H+ in the thylakoid compartments provides energy for the
________ by ________. (CORRECT ANSWER)Production of ATP; ATP synthase
Autotrophs that utilize light as their energy source are (CORRECT
ANSWER)Photoautotrophs
Light reactions produce (CORRECT ANSWER)ATP, NADPH, and O2
What transport hydrogen protons and electrons from the light reactions to the Calvin
Cycle? (CORRECT ANSWER)NADPH
Aerobic respiration takes place (CORRECT ANSWER)In both plants and animals
, The term "cycle" is used to describe the Calvin Cycle because: (CORRECT
ANSWER)The process begins and ends with RuBP (a five carbon sugar)
Cellular respiration is the process by which: (CORRECT ANSWER)Energy from the
chemical bonds of food molecules is released to an organism
Which of the following energy-generating processes is the only one that occurs in all
living organisms? (CORRECT ANSWER)Glycolysis
How is O2 involved in photosynthesis? (CORRECT ANSWER)O2 is a product of
light reactions
In photosynthesis, ATP is required during which of the following reactions?
(CORRECT ANSWER)Calvin Cycle only
All of the following are part of the Calvin Cycle EXCEPT: (CORRECT
ANSWER)Generation of ATP
Stomata are pores found in the leaves and stems of plants. What is their purpose?
(CORRECT ANSWER)Stomata open to allow gas exchange and close to prevent
the loss of water
Why do plant leaves appear green? (CORRECT ANSWER)The chlorophyll in leaves
reflect green light
All of the following compounds are necessary constituents for photosynthesis
EXCEPT: (CORRECT ANSWER)Oxygen
Cyclic photophosphorylation is called cyclic because: (CORRECT ANSWER)An
electron leaving a chlorophyll molecule returns to it
Why do chloroplasts make energy carriers during the light reactions? (CORRECT
ANSWER)To provide energy for the synthesis of sugar
Where does the synthesis of pyruvic acid occur during glycolysis? (CORRECT
ANSWER)Cytoplasm
Suppose you are studying photosynthesis in a research lab. You grow your plants in
a chamber with a source of CO2 that has radioactively labeled carbon atom. What
photosynthetic product will be radioactive? (CORRECT ANSWER)Glucose
Most carbon enters the web of life through: (CORRECT ANSWER)Photosynthesis
Which of the following is main purpose of cellular respiration? (CORRECT
ANSWER)Creation of energy
The light reactions take place in the _____ and Calvin Cycle takes place in the
______. (CORRECT ANSWER)Grana; stroma
