Exam 1: Exam 2: Exam 3: Bios 255 : Questions &
Answers : Updated
What is the role of chlorophyll in plants? - ANSWER:Chlorophyll captures solar energy to produce plant
energy
What provides electrons to replace chlorophyll's missing electrons in the light reactions? - ANSWER:H2O
Glycolsis ends with the formation of: - ANSWER:Pyruvic acid
In the C3 pathway, where does the carbon from to form glucose? - ANSWER:Atmospheric CO2
If you find a leaf that appears very blue it reflects which color of light? - ANSWER:Blue
In plant cells, the pigments important in the manufacture of carbohydrates from carbon dioxide and
water contained in the: - ANSWER:Cytoplasm
The actual production of sugars during photosynthesis takes place: - ANSWER:Within the stroma, outside
the thylakoid, but still within the chloroplast
Glycolysis: - ANSWER:Requires the presence of CO2
What is the purpose of a cuticle on a leaf? - 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? - ANSWER:O2 gas
Chlorophyll molecules are located in which part of the chloroplast? - ANSWER:Grana
A high concentration of H+ in the thylakoid compartments provides energy for the ________ by
________. - ANSWER:Production of ATP; ATP synthase
Autotrophs that utilize light as their energy source are - ANSWER:Photoautotrophs
Light reactions produce - ANSWER:ATP, NADPH, and O2
What transport hydrogen protons and electrons from the light reactions to the Calvin Cycle? -
ANSWER:NADPH
Aerobic respiration takes place - ANSWER:In both plants and animals
The term "cycle" is used to describe the Calvin Cycle because: - ANSWER:The process begins and ends
with RuBP (a five carbon sugar)
Cellular respiration is the process by which: - 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? -
ANSWER:Glycolysis
How is O2 involved in photosynthesis? - ANSWER:O2 is a product of light reactions
, In photosynthesis, ATP is required during which of the following reactions? - ANSWER:Calvin Cycle only
All of the following are part of the Calvin Cycle EXCEPT: - ANSWER:Generation of ATP
Stomata are pores found in the leaves and stems of plants. What is their purpose? - ANSWER:Stomata
open to allow gas exchange and close to prevent the loss of water
Why do plant leaves appear green? - ANSWER:The chlorophyll in leaves reflect green light
All of the following compounds are necessary constituents for photosynthesis EXCEPT: - ANSWER:Oxygen
Cyclic photophosphorylation is called cyclic because: - ANSWER:An electron leaving a chlorophyll
molecule returns to it
Why do chloroplasts make energy carriers during the light reactions? - ANSWER:To provide energy for
the synthesis of sugar
Where does the synthesis of pyruvic acid occur during glycolysis? - 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? - ANSWER:Glucose
Most carbon enters the web of life through: - ANSWER:Photosynthesis
Which of the following is main purpose of cellular respiration? - ANSWER:Creation of energy
The light reactions take place in the _____ and Calvin Cycle takes place in the ______. - ANSWER:Grana;
stroma
The only part of a green plant that is actually green is the: - ANSWER:Grana of chloroplasts
What provides the carbon atoms that are incorporated into sugar molecule in the Calvin Cycle? -
ANSWER:Carbon Dioxide (CO2)
What did Farr say in class could stop electron flow - ANSWER:Cyanide
When NADP is converted into NADPH during photosynthesis, this is ______ reaction. -
ANSWER:Reduction
The light reactions of photosynthesis use _____ and produce ______. - ANSWER:Water; NADPH
What happens to the energy carriers made during the light reactions? They are used - ANSWER:To
provide energy for the synthesis of sugar
You just purchased a really cool lamp that has yellow-green plastic globe for a shade that surrounds the
light bulb. You put a plant under the lamp, but it dies within a week. What has happened? - ANSWER:The
yellow-green light produced by the lamp can't be utilized for photosynthesis
The products of photosynthesis are: - ANSWER:Glucose and oxygen
Where does the O2 released during photosynthesis come from? - ANSWER:H2O
Answers : Updated
What is the role of chlorophyll in plants? - ANSWER:Chlorophyll captures solar energy to produce plant
energy
What provides electrons to replace chlorophyll's missing electrons in the light reactions? - ANSWER:H2O
Glycolsis ends with the formation of: - ANSWER:Pyruvic acid
In the C3 pathway, where does the carbon from to form glucose? - ANSWER:Atmospheric CO2
If you find a leaf that appears very blue it reflects which color of light? - ANSWER:Blue
In plant cells, the pigments important in the manufacture of carbohydrates from carbon dioxide and
water contained in the: - ANSWER:Cytoplasm
The actual production of sugars during photosynthesis takes place: - ANSWER:Within the stroma, outside
the thylakoid, but still within the chloroplast
Glycolysis: - ANSWER:Requires the presence of CO2
What is the purpose of a cuticle on a leaf? - 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? - ANSWER:O2 gas
Chlorophyll molecules are located in which part of the chloroplast? - ANSWER:Grana
A high concentration of H+ in the thylakoid compartments provides energy for the ________ by
________. - ANSWER:Production of ATP; ATP synthase
Autotrophs that utilize light as their energy source are - ANSWER:Photoautotrophs
Light reactions produce - ANSWER:ATP, NADPH, and O2
What transport hydrogen protons and electrons from the light reactions to the Calvin Cycle? -
ANSWER:NADPH
Aerobic respiration takes place - ANSWER:In both plants and animals
The term "cycle" is used to describe the Calvin Cycle because: - ANSWER:The process begins and ends
with RuBP (a five carbon sugar)
Cellular respiration is the process by which: - 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? -
ANSWER:Glycolysis
How is O2 involved in photosynthesis? - ANSWER:O2 is a product of light reactions
, In photosynthesis, ATP is required during which of the following reactions? - ANSWER:Calvin Cycle only
All of the following are part of the Calvin Cycle EXCEPT: - ANSWER:Generation of ATP
Stomata are pores found in the leaves and stems of plants. What is their purpose? - ANSWER:Stomata
open to allow gas exchange and close to prevent the loss of water
Why do plant leaves appear green? - ANSWER:The chlorophyll in leaves reflect green light
All of the following compounds are necessary constituents for photosynthesis EXCEPT: - ANSWER:Oxygen
Cyclic photophosphorylation is called cyclic because: - ANSWER:An electron leaving a chlorophyll
molecule returns to it
Why do chloroplasts make energy carriers during the light reactions? - ANSWER:To provide energy for
the synthesis of sugar
Where does the synthesis of pyruvic acid occur during glycolysis? - 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? - ANSWER:Glucose
Most carbon enters the web of life through: - ANSWER:Photosynthesis
Which of the following is main purpose of cellular respiration? - ANSWER:Creation of energy
The light reactions take place in the _____ and Calvin Cycle takes place in the ______. - ANSWER:Grana;
stroma
The only part of a green plant that is actually green is the: - ANSWER:Grana of chloroplasts
What provides the carbon atoms that are incorporated into sugar molecule in the Calvin Cycle? -
ANSWER:Carbon Dioxide (CO2)
What did Farr say in class could stop electron flow - ANSWER:Cyanide
When NADP is converted into NADPH during photosynthesis, this is ______ reaction. -
ANSWER:Reduction
The light reactions of photosynthesis use _____ and produce ______. - ANSWER:Water; NADPH
What happens to the energy carriers made during the light reactions? They are used - ANSWER:To
provide energy for the synthesis of sugar
You just purchased a really cool lamp that has yellow-green plastic globe for a shade that surrounds the
light bulb. You put a plant under the lamp, but it dies within a week. What has happened? - ANSWER:The
yellow-green light produced by the lamp can't be utilized for photosynthesis
The products of photosynthesis are: - ANSWER:Glucose and oxygen
Where does the O2 released during photosynthesis come from? - ANSWER:H2O
