About this Study Set
This study set covers Biology through
29 practice questions.
This study material covers the fundamental process of photosynthesis, including its inputs, outputs, and significance for life on Earth. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 29 questions from the
Understanding Photosynthesis study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the primary process by which plants convert light energy into chemical energy?
-
A
Respiration
-
B
Transpiration
-
C
Photosynthesis
-
D
Fermentation
2
Which gas do plants absorb from the atmosphere during photosynthesis?
-
A
Oxygen
-
B
Carbon Dioxide
-
C
Nitrogen
-
D
Hydrogen
3
What is the main pigment responsible for capturing light energy in plants?
-
A
Carotene
-
B
Xanthophyll
-
C
Chlorophyll
-
D
Anthocyanin
4
Which of the following is a product of photosynthesis?
-
A
Water
-
B
Carbon Dioxide
-
C
Glucose
-
D
Nitrogen
5
What is the primary source of energy for photosynthesis?
-
A
Heat from the soil
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B
Chemical bonds in water
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C
Light from the sun
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D
Energy from nutrients
6
Where does photosynthesis primarily take place in a plant cell?
-
A
Mitochondria
-
B
Nucleus
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C
Ribosomes
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D
Chloroplasts
7
What substance is released into the atmosphere as a byproduct of photosynthesis?
-
A
Carbon Dioxide
-
B
Glucose
-
C
Oxygen
-
D
Water Vapor
8
What do plants use to transport water from their roots to their leaves for photosynthesis?
-
A
Phloem
-
B
Xylem
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C
Stomata
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D
Cuticle
9
Besides light and carbon dioxide, what other key ingredient is needed for photosynthesis?
-
A
Nitrogen
-
B
Oxygen
-
C
Water
-
D
Minerals
10
What is the chemical formula for glucose, a sugar produced during photosynthesis?
-
A
CO2
-
B
H2O
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C
C6H12O6
-
D
O2
11
Photosynthesis is essential for maintaining the balance of which two gases in the Earth's atmosphere?
-
A
Nitrogen and Oxygen
-
B
Carbon Dioxide and Methane
-
C
Oxygen and Carbon Dioxide
-
D
Hydrogen and Helium
12
What part of the plant leaf is primarily responsible for gas exchange (taking in CO2 and releasing O2)?
-
A
Epidermis
-
B
Veins
-
C
Stomata
-
D
Mesophyll
13
In which part of the chloroplast does the light-dependent reaction of photosynthesis occur?
-
A
Stroma
-
B
Thylakoids
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C
Outer Membrane
-
D
Inner Membrane
14
In which part of the chloroplast does the light-independent reaction (Calvin Cycle) of photosynthesis occur?
-
A
Thylakoids
-
B
Stroma
-
C
Granum
-
D
Outer Membrane
15
What is the main function of stomata in photosynthesis?
-
A
Absorbing sunlight
-
B
Releasing oxygen
-
C
Regulating water loss and gas exchange
-
D
Producing glucose
16
What are the two main stages of photosynthesis?
-
A
Glycolysis and Krebs Cycle
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B
Light-dependent reactions and Light-independent reactions
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C
Fermentation and Aerobic Respiration
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D
Cellular Respiration and Photosynthesis
17
What is the energy currency molecule produced during the light-dependent reactions that powers the Calvin cycle?
-
A
ATP
-
B
ADP
-
C
NADPH
-
D
NADP+
18
Besides ATP, what other energy-carrying molecule is produced during the light-dependent reactions and used in the Calvin cycle?
-
A
Glucose
-
B
Water
-
C
NADPH
-
D
Oxygen
19
The Calvin Cycle uses ATP and NADPH to convert carbon dioxide into what?
-
A
Oxygen
-
B
Water
-
C
Glucose
-
D
Light Energy
20
What is the overall equation for photosynthesis?
-
A
C6H12O6 + 6O2 → 6CO2 + 6H2O
-
B
6CO2 + 6H2O + Light Energy → C6H12O6 + 6O2
-
C
6CO2 + C6H12O6 → 6O2 + 6H2O
-
D
C6H12O6 → 6CO2 + 6H2O
21
What is the role of chlorophyll in photosynthesis?
-
A
To store water
-
B
To break down glucose
-
C
To absorb light energy
-
D
To release oxygen
22
What would happen to a plant if it were deprived of sunlight for an extended period?
-
A
It would grow faster
-
B
It would produce more oxygen
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C
It would eventually die due to lack of energy production
-
D
It would start to respire more intensely
23
Photosynthesis is a process that converts light energy into what type of energy?
-
A
Thermal energy
-
B
Mechanical energy
-
C
Chemical energy
-
D
Electrical energy
24
What is the term for organisms that can produce their own food through photosynthesis?
-
A
Heterotrophs
-
B
Consumers
-
C
Autotrophs
-
D
Decomposers
25
What are the raw materials for photosynthesis?
-
A
Glucose and Oxygen
-
B
Carbon Dioxide and Water
-
C
Water and Glucose
-
D
Oxygen and Carbon Dioxide
26
What are the products of photosynthesis?
-
A
Carbon Dioxide and Water
-
B
Glucose and Oxygen
-
C
Water and Glucose
-
D
Oxygen and Carbon Dioxide
27
Which of the following is NOT a direct input for photosynthesis?
-
A
Carbon Dioxide
-
B
Water
-
C
Sunlight
-
D
Oxygen
28
Which of the following is NOT a direct output of photosynthesis?
-
A
Glucose
-
B
Oxygen
-
C
Carbon Dioxide
-
D
Water (as a product, though also an input)
29
What is the primary purpose of photosynthesis for the plant?
-
A
To produce water
-
B
To release carbon dioxide
-
C
To create food (glucose) for energy and growth
-
D
To absorb oxygen
