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Chapter 6 - Photosynthesis

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Which of the autotrophs involves sulphur bacteria?

a)

Photoautotroph.

b)

Chemoautotroph.

2.

Chlorophyll a is bluish green in colour.

a)

True.

b)

False.

3.

Chlorophyll b absorbs light mainly in the 400nm and 650nm regions.

a)

True.

b)

False.

4.

Which of the following spectrum represents the actual rate of a physiological activity in the living cells?

a)

Action spectrum.

b)

Absorption spectrum.

5.

Light energy is absorbed by accessory pigments of _______________.

a)

Photosystem I

b)

Photosystem II

6.

Non-cyclic photophosphorylation does not involve photolysis of water.

a)

True.

b)

False.

7.

The photoactivated electrons released from PS II are accepted by __________ before transferring to plastoquinone.

a)

plastocyanin

b)

NADP+ reductase

c)

phaeophytin

d)

cytochrome b6f complex

8.

In non-cyclic photophosphorylation, water molecules are split up, producing ___ electrons, ___ hydrogen ions and ___ oxygen molecule.

a)

4, 1, 4.

b)

1, 1, 4.

c)

4, 4, 1.

d)

1, 4, 4.

9.

in light-dependent reactions, NADPH is lastly released into the __________ of the chloroplast.

a)

thylakoid

b)

grana

c)

stroma

d)

intermembrane

10.

In cyclic photophosphorylation, the second electron acceptor is __________.

a)

ferredoxin

b)

FeS

c)

NADP+ reductase

d)

plastocyanin

11.

The products of non-cyclic photophosphorylation are ATP, NADPH and oxygen while the product of cyclic photophosphorylation is only ATP.

a)

True.

b)

False.

12.

Thylakoid membrane is permeable to protons.

a)

True.

b)

False.

13.

In Calvin cycle, ___ of the glyceraldehyde-3-phosphate produced is used for the biosynthesis of organic substances.

a)

1/6

b)

1/2

c)

5/6

d)

2/3

14.

In photorespiration, oxygen acts as _______________ inhibitor and competes with carbon dioxide for the active site of the rubisco.

a)

non-competitive

b)

competitive

15.

Photorespiration involves chloroplast, peroxisome and mitochondrion.

a)

True.

b)

False.

16.

Light reaction occurs in thylakoid of chloroplast while dark reaction occurs in stroma of chloroplast.

a)

True.

b)

False.

17.

Bundle sheath cells contain many _____ chloroplasts with less _____ grana and contain starch grains.

a)

large, well-developed

b)

small, well-developed

c)

large, poorly

d)

small, poorly

18.

The first product formed in C3 plants is _______________ while the first product formed in C4 plants in _______________.

a)

glycerate-3-phosphate, oxaloacetate

b)

oxaloacetate, glycerate-3-phosphate

c)

phosphoenolpyruvate, glyceraldehyde-3-phosphate

d)

glyceraldehyde-3-phosphate, phosphoenolpyruvate

19.

CAM plants _____ stomata during day and _____ stomata at night.

a)

close, close

b)

open, open

c)

open, close

d)

close, open

20.

Increased carbon dioxide concentration _______________ the photosynthetic rate until a saturation point is reached.

a)

increases

b)

decreases