Answers41111de1 ECAD Fall 2026 - Q2 - NM-Biology - S1Light Independent Reactions in Photosynthesis

Light Independent Reactions in Photosynthesis Answers

17 verified answers1 views
1
Free Preview

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

A
water
B
sunlight
C
oxygen
D
carbon dioxide
2
Free Preview

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

A
energy
B
CO2
C
water
D
ATP and NADPH
3

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

A
ATP
B
PGA
C
RuBP
D
NADPH
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 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

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

A
H2O
B
ATP
C
NADPH
D
CO2
7

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

A
sunlight
B
the soil
C
the atmosphere
D
the plant
8

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.
9

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.
10

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
11

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.
12

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
13

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

A
H2O
B
ATP
C
NADPH
D
CO2
14

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.
15

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.
16

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.
17

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

A
water
B
sunlight
C
oxygen
D
carbon dioxide
18

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
19

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

A
ATP
B
PGA
C
RuBP
D
NADPH
20

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.

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Light Independent Reactions in Photosynthesis

Quiz
10 verified answers

Lesson 5: Light Independent Reactions in Photosynthesis

Quiz
10 verified answers

Lesson 6: Cellular Respiration