AnswersFL-2000310-Biology 1 Sem 2 - FlexHuman Impact on the Environment

Light Independent Reactions in Photosynthesis Answers

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1
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In which type of environment are plants most likely to use a C4 pathway of carbon fixation?

A
cold and wet
B
cold and dry
C
hot and wet
D
hot and dry
2
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Which is required for the light-independent reactions in photosynthesis to occur?

A
water
B
sunlight
C
oxygen
D
carbon dioxide
3

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
4

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.
5

Which is the first step in the scientific method?

A
ask a question
B
conduct background research
C
construct a hypothesis
D
perform an experiment
6

Which compound is a metabolic intermediate of the light-independent reactions in photosynthesis?

A
ATP
B
PGA
C
RuBP
D
NADPH
7

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

A
H2O
B
ATP
C
NADPH
D
CO2
8

In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen.6CO2 + 6H2O ® C6H12O6 + 6O2Which component could be added to complete this chemical equation?

A
light energy
B
ATP and NADPH
C
chemical energy
D
rubisco
9

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.
10

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.
11

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

A
sunlight
B
the soil
C
the atmosphere
D
the plant
12

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

A
energy
B
CO2
C
water
D
ATP and NADPH
13

Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis?

A
The L-D reactions need CO2 and light energy, and the L-IND reactions needs water and O2.
B
The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH, and CO2.
C
The L-D reactions can only occur during daylight, and the L-IND reactions can only occur during the night.
D
The L-D reactions need water and CO2, and the L-IND reactions need CO2 and light.
14

Which compound is produced during regeneration?

A
PGA
B
G3P
C
RuBP
D
rubisco
15

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.
16

How do ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis?

A
ATP and NADPH are produced in both reactions.
B
ATP and NADPH are used in both reactions.
C
ATP and NADPH are produced in the light-dependent reactions and used in the light-independent reactions.
D
ATP and NADPH are produced in the light-independent reactions and used in the light-dependent reactions.

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