WorksheetsPHOTO + SYNTHESIS
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
Which of the following is a product of photosynthesis
a)
oxygen
b)
nitrogen
c)
carbon dioxide
d)
methane
2.
Which of the following is not a plant cell
a)
nucleus
b)
mitochondrion
c)
chloroplast
d)
ribosome
3.
What is the process by which plants make their own food called?
a)
respiration
b)
photosynthesis
c)
digestion
d)
transpiration
4.
Which of the following is responsible for carrying out photosynthesis in plant cells
a)
nucleus
b)
chloroplast
c)
mitochondrion
d)
vacuole
5.
The process by which plants release water vapour through their leaves is called
a)
transpiration
b)
respiration
c)
excretion
d)
osmosis
6.
What is the primary source of energy for photosynthesis?
a)
carbon dioxide
b)
water
c)
sunlight
d)
chlorophyll
7.
What is the byproduct of photosynthesis that is released into the atmosphere?
a)
carbon dioxide
b)
oxygen
c)
glucose
d)
water
8.
What is the role of chlorophyll in photosynthesis?
a)
to absorb water
b)
to absorb light energy
c)
to release carbon dioxide
d)
to release oxygen
9.
What is the overall equation for photosynthesis?
a)
6 CO2 + 6 H2O → C6H12O6 + 6 O2
b)
6 CO2 + 6 O2 → C6H12O6 + 6 H2O
c)
6 H2O + 6 O2 → C6H12O6 + 6 CO2
d)
6 CO2 + 6 H2O → 6 O2 + 6 H2O
10.
Why is photosynthesis essential for life on Earth?
a)
It produces carbon dioxide and oxygen
b)
It produces oxygen and organic compounds
c)
It releases water and water vapor
d)
It releases glucose and carbon dioxide
11.
What is photosynthesis?
a)
The process of making glucose from sunlight
b)
The process of releasing oxygen from plants
c)
The process of making energy from sunlight
d)
The process of growing plants from seeds
12.
Which of the following is responsible for respiration in plant cells
a)
nucleus
b)
chloroplast
c)
mitochondrion
d)
vacuole
13.
What are the raw materials for photosynthesis?
a)
Water, carbon dioxide, and sunlight
b)
Water, oxygen, and glucose
c)
Carbon dioxide, oxygen, and sunlight
d)
Water, glucose, and sunlight
14.
. What are the products of photosynthesis?
a)
Glucose and oxygen
b)
Water and carbon dioxide
c)
Oxygen and sunlight
d)
Glucose and water
15.
What is the reactant that provides energy for photosynthesis?
a)
chlorophyll
b)
carbon dioxide
c)
sunlight
d)
oxygen
16.
What is the by-product of photosynthesis that is released into the air?
a)
carbon dioxide
b)
oxygen
c)
water
d)
glucose
17.
Why is photosynthesis important for life on Earth?
a)
It produces oxygen and glucose
b)
It produces water and carbon dioxide
c)
It produces sunlight and energy
d)
It produces plants and animals
18.
What would happen if photosynthesis stopped occurring?
a)
Plants would grow faster
b)
Animals would have more oxygen
c)
The Earth's atmosphere would change
d)
The Earth's temperature would increase
19.
How can you test for starch in a leaf?
a)
By adding iodine solution
b)
By adding water
c)
By adding chlorophyll
d)
By adding carbon dioxide
20.
What color change occurs when starch is present in a leaf?
a)
Blue to white
b)
White to blue
c)
Colorless to blue-black
d)
Blue-black to colorless
21.
What is the role of magnesium in photosynthesis?
a)
To absorb water
b)
To absorb carbon dioxide
c)
To absorb sunlight
d)
To absorb magnesium
22.
What is the role of nitrate in plant growth?
a)
To provide energy
b)
To provide water
c)
To provide nitrogen
d)
To provide carbon dioxide
23.
What is the main difference between photosynthesis and respiration? N|B: Multiple answers
a)
Photosynthesis produces oxygen, while respiration consumes oxygen
b)
Photosynthesis consumes oxygen, while respiration produces oxygen
c)
Photosynthesis produces glucose, while respiration consumes glucose
d)
Photosynthesis consumes glucose, while respiration produces glucose
24.
What is the similarity between photosynthesis and respiration?
a)
Both produce energy
b)
Both consume energy
c)
Both produce oxygen
d)
Both consume oxygen
25.
What is the role of stomata in photosynthesis? NB: multiple answers
a)
A) To absorb water
b)
B) To absorb carbon dioxide
c)
C) To release oxygen
d)
D) To release water vapor
26.
Where are stomata usually found in a leaf?
a)
A) On the upper surface
b)
B) On the lower surface
c)
C) On the stem
d)
D) On the roots
27.
When does photosynthesis occur?
a)
A) At night
b)
B) During the day
c)
C) During the winter
d)
D) During the summer
28.
Where does photosynthesis occur?
a)
in the leaves
b)
in the roots
c)
in the flowers
d)
in the stems
29.
Which part of the leaf has more stomata?
a)
lower epidermis
b)
upper epidermis
c)
midrib
d)
petiole
30.
What is the function of the chloroplasts in a leaf?
a)
A) To absorb water
b)
B) To absorb carbon dioxide
c)
C) To produce glucose
d)
D) To produce oxygen
31.
Which stage of photosynthesis requires light energy?
a)
light dependent reactions
b)
light independent reactions
c)
calvin cycle
d)
stomatal diffussion
32.
Which molecule is a carrier of energy during photosynthesis?
a)
ATP (Adenosine triphosphate)
b)
DNA (Deoxyribonucleic acid)
c)
RNA (Ribonucleic acid)
d)
Protein (Polpypeptides / Amino acids)
33.
What role does water play in photosynthesis?
a)
source of carbon
b)
supplies electron
c)
releases oxygen
d)
provides energy
34.
In the photosynthesis equation,
6CO2 + 6O2 + Light energy → C6H12O6 + 6H2O,
what does “C12H6O6” represent?
a)
carbon dioxide
b)
oxygen
c)
glucose
d)
water
35.
How does an increase in light intensity affect the rate of photosynthesis?
a)
A) It has no effect
b)
B) It decreases the rate
c)
C) It increases the rate
d)
D) It stops photosynthesis
36.
Which environmental factor can negatively impact photosynthesis if it becomes too high?
a)
oxygen concentration
b)
carbon dioxide concentration
c)
light intensity
d)
temperature
37.
What is the relationship between photosynthesis and the oxygen content in the atmosphere?
a)
A) Photosynthesis decreases oxygen levels
b)
B) Photosynthesis has no impact on oxygen levels
c)
C) Photosynthesis increases oxygen levels
d)
D) Photosynthesis creates carbon dioxide
38.
Which gas is necessary for photosynthesis to occur?
a)
oxygen
b)
carbon dioxide
c)
nitrogen
d)
hydrogen
39.
What is the main function of xylem vessels in plants?
a)
a) Transporting sugars from leaves to other parts
b)
b) Transporting water and minerals from roots to other parts
c)
c) Regulating stomatal openings
d)
d) Synthesizing nutrients
40.
What does the term "transpiration" refer to in the context of xylem vessels?
a)
a) The release of oxygen during photosynthesis
b)
b) The process of water and mineral uptake by roots
c)
c) The movement of sugars through the phloem
d)
d) The loss of water vapor from leaves
41.
Which of the following is NOT a factor influencing transpiration?
a)
a) Wind speed
b)
b) Humidity
c)
c) Root pressure
d)
d) Temperature
42.
How do plants regulate transpiration to conserve water?
a)
a) By increasing the number of stomata
b)
b) By increasing light intensity
c)
c) By closing stomata
d)
d) By decreasing root length
43.
What is the primary function of stomata during transpiration?
a)
a) To release oxygen
b)
b) To regulate temperature
c)
c) To release carbon dioxide
d)
d) To control water loss
44.
What is the main reason for transpiration in plants?
a)
a) To release excess water from roots
b)
b) To cool down the plant
c)
c) To facilitate gas exchange
d)
d) To transport nutrients
45.
In which plant tissue does transpiration primarily occur?
a)
a) Xylem
b)
b) Phloem
c)
c) Epidermis
d)
d) Parenchyma
46.
What is a variegated leaf?
a)
A) a leaf with varying length
b)
B) a leaf with a large surface area
c)
C) a leaf with different colours
d)
D) a leaf with varying densities
47.
If a plant does not get the minerals it needs, the condition is called
a)
A) stunted growth
b)
B) mineral deficiency
c)
C) asymptomatic
d)
D) healthy growth
48.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be changed (Independent variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
49.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be unchanged / maintained (Control variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
50.
In finding out the effect of different colours of light on the rate pf photosynthesis, the number of bubbles that the water plant gave off in one minute was counted.
What will be the variable that needs to be observed / measured (Dependent variable)?
a)
A) the different colours of light
b)
B) the type of plant used
c)
C) the time used (1 minute)
d)
D) the number of bubbles collected
100 %
