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WorksheetsForm 5_Ch 21
Total questions: 28
Worksheet time: 28mins
Complete the word equation for photosynthesis.
(a)________________ + water → glucose + (b)________________
(a) oxygen；(b) carbon dioxide
(a) carbon dioxide；(b) oxygen
Which of the following are importances of chlorophyll in photosynthesis?
(1) To absorb light energy
(2) To absorb carbon dioxide
(3) To drive the synthesis of organic molecules
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Arrange in the correct order the following steps for testing the presence of starch in the leaves of a plant.
(1) Add iodine solution.
(2) Put the leaves in hot alcohol for five minutes.
(3) Put the leaves in boiling water for five minutes.
(4) Put the leaves in water at room temperature for a few seconds.
(2), (3), (4), (1)
(2), (4), (3), (1)
(3), (2), (4), (1)
(3), (4), (2), (1)
Which of the following correctly describes the stroma of chloroplasts?
disc-shaped membrane structures; chlorophyll is found on the membranes
a transparent layer of cells that allows light to reach the inner parts of the leaf
contains enzymes for catalysing photosynthetic reactions
a waxy layer that prevents water loss from leaves
Which of the following correctly describes the thylakoid?
disc-shaped membrane structure; chlorophyll is found on the membranes
a transparent layer of cells that allows light to reach the inner parts of the leaf
contains enzymes for catalysing photosynthetic reactions
a waxy layer that prevents water loss from leaves
Which of the following correctly describes the cuticle?
a transparent layer of cells that allows light to reach the inner parts of the leaf
a waxy layer that prevents water loss from leaves
composed of closely packed cells with numerous chloroplasts to absorb light
composed of loosely packed cells with lots of air spaces to allow gases to diffuse freely
Which of the following correctly describes the leaf epidermis?
a layer of cells that allows light to reach the inner parts of the leaf
a waxy layer that prevents water loss from leaves
composed of closely packed cells with numerous chloroplasts to absorb light
composed of loosely packed cells with lots of air spaces to allow gases to diffuse freely
Which of the following correctly describes the spongy mesophyll?
a transparent layer of cells that allows light to reach the inner parts of the leaf
a waxy layer that prevents water loss from leaves
composed of closely packed cells with numerous chloroplasts to absorb light
composed of loosely packed cells with lots of air spaces to allow gases to diffuse freely
Which of the following correctly describes the palisade mesophyll?
a transparent layer of cells that allows light to reach the inner parts of the leaf
a waxy layer that prevents water loss from leaves
composed of closely packed cells with numerous chloroplasts to absorb light
composed of loosely packed cells with lots of air spaces to allow gases to diffuse freely
Which of the following correctly describes NADPH?
a compound that combines with the 5-C compound in the Calvin cycle
a compound that donates hydrogen to NADP in photochemical reactions
a product of the photochemical reactions and is used in the Calvin cycle
a product of the photochemical reactions and is not used in the Calvin cycle
Which of the following correctly describes water?
a compound that combines with the 5-C compound in the Calvin cycle
a compound that donates hydrogen to NADP in photochemical reactions
a product of the photochemical reactions and is used in the Calvin cycle
a product of the photochemical reactions and is not used in the Calvin cycle
Which of the following correctly describes oxygen?
a compound that combines with the 5-C compound in the Calvin cycle
a compound that is regenerated in the Calvin cycle
a product of the photochemical reactions and is used in the Calvin cycle
a product of the photochemical reactions and is not used in the Calvin cycle
Which of the following correctly describes carbon dioxide?
a compound that combines with the 5-C compound in the Calvin cycle
a compound that is regenerated in the Calvin cycle
a product of the photochemical reactions and is used in the Calvin cycle
a product of the photochemical reactions and is not used in the Calvin cycle
Which of the following are the uses of glucose produced in photosynthesis?
(1) releasing energy in respiration
(2) conversion to starch for storage
(3) synthesizing cellulose which is used to build plant cell wall
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
Name the structure labelled R.
Starch grain
Glucose
Chlorophyll
Thylakoid
At 2 units of light intensity, light intensity is the limiting factor for photosynthesis.
True
False
At 6 units of light intensity, light intensity is the limiting factor for photosynthesis.
True
False
which of the following is not required in photochemical reactions?
Water
Carbon dioxide
ADP+Pi
NADP
Which of the following molecule is not required in Calvin cycle?
Carbon dioxide
Oxygen
NADPH
ATP
which of the following could be used to absorb carbon dioxide in the experiments?
Potassium hydroxide pellet
hydrogencarbonate indicator
Sodium hydrogencarbonate solution
Nitrate ions
What is / are the purpose(s) of putting the leaf in boiling water?
(1) to remove chlorophyll from the leaf
(2) to stop all chemical reactions in the leaf
(3) to disrupt the cell membrane of the leaf cell
(1) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
What is the purpose of putting the leaf in hot alcohol?
to sterilize the leaf
to remove chlorophyll from the leaf
to kill the leaf cells
to make starch granules come out from the leaf cells
Where does the oxygen released in photosynthesis come from?
Water
Carbon dioxide
Gucose
ATP
Chlorophyll is a raw material of photosynthesis.
True
False
Which of the following statements are correct?
(1) Light is absorbed by chlorophyll in plant cells.
(2) Light is a raw material of photosynthesis.
(3) Light provides the energy to drive the reactions of photosynthesis.
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)
The diagram below shows the transverse section of dicotyledonous leaf.
What is tissue 1?
cuticle
epidermis
palisade mesophyll
spongy mesophyll
The diagram below shows the transverse section of dicotyledonous leaf.
Which of the labelled parts contain(s) chloroplasts?
1 only
2 and 3 only
1, 2 and 3 only
2, 3 and 4 only
The graph shows the effect of light intensity on the rate of photosynthesis.
Why does the rate of photosynthesis level off at higher light intensities?
Light intensity is the limiting factor, but other factors like carbon dioxide concentration is not limiting the rate of photosynthesis.
Photosynthetic products accumulate and inhibit the photosynthetic reactions.
Light intensity is not the limiting factor, but other factors like carbon dioxide concentration is limiting the rate of photosynthesis.
High light intensities cause the temperature to increase beyond the optimum level for photosynthesis.
