AnswersLHS Biology 1Light Independent Reactions in Photosynthesis

Light Independent Reactions in Photosynthesis Answers

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1
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What is the source of the carbon dioxide that is used in photosynthesis?

A
sunlight
B
the soil
C
the atmosphere
D
the plant
2
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Which is required for the light-dependent reactions in photosynthesis to occur?

A
H2O
B
ATP
C
NADPH
D
CO2
3

Which statement about the light-independent reactions in photosynthesis is true?

A
They occur in the thylakoids.
B
They produce ATP and NADPH.
C
They release oxygen as waste.
D
They comprise the Calvin cycle.
4

Which process occurs during the light-dependent reactions in photosynthesis?

A
Water molecules are split.
B
Carbon fixation occurs.
C
PGA is reduced.
D
RuBP is regenerated.
5

Which is the best hypothesis for the scientific question “How does light intensity affect the rate of photosynthesis?”

A
Light intensity, CO2 concentration, and temperature are factors that determine the rate of photosynthesis.
B
Light intensity has no effect on the rate of photosynthesis.
C
If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease.
D
Light intensity has an impact on the rate of photosynthesis.
6

What is one role of ATP in the light-independent reaction of photosynthesis?

A
ATP supplies the energy to produce glucose and other carbohydrates.
B
ATP is produced when water molecules are split and chlorophyll electrons are excited.
C
ATP supplies the energy to split water molecules.
D
ATP produces CO2 and O2 molecules.
7

What is required for both the light-dependent and light-independent reactions to proceed?

A
energy
B
CO2
C
water
D
ATP and NADPH
8

Which compound is produced during regeneration?

A
PGA
B
G3P
C
RuBP
D
rubisco
9

Which is required for the light-independent reactions in photosynthesis to occur?

A
water
B
sunlight
C
oxygen
D
carbon dioxide
10

During reduction, PGA reacts with ATP and NADPH. What does ATP contribute to the reaction?

A
carbon
B
hydrogen ions
C
electrons
D
phosphate group

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