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WorksheetsChapter 6 - Photosynthesis
Total questions: 20
Worksheet time: 10mins
Which of the autotrophs involves sulphur bacteria?
Photoautotroph.
Chemoautotroph.
Chlorophyll a is bluish green in colour.
True.
False.
Chlorophyll b absorbs light mainly in the 400nm and 650nm regions.
True.
False.
Which of the following spectrum represents the actual rate of a physiological activity in the living cells?
Action spectrum.
Absorption spectrum.
Light energy is absorbed by accessory pigments of _______________.
Photosystem I
Photosystem II
Non-cyclic photophosphorylation does not involve photolysis of water.
True.
False.
The photoactivated electrons released from PS II are accepted by __________ before transferring to plastoquinone.
plastocyanin
NADP+ reductase
phaeophytin
cytochrome b6f complex
In non-cyclic photophosphorylation, water molecules are split up, producing ___ electrons, ___ hydrogen ions and ___ oxygen molecule.
4, 1, 4.
1, 1, 4.
4, 4, 1.
1, 4, 4.
in light-dependent reactions, NADPH is lastly released into the __________ of the chloroplast.
thylakoid
grana
stroma
intermembrane
In cyclic photophosphorylation, the second electron acceptor is __________.
ferredoxin
FeS
NADP+ reductase
plastocyanin
The products of non-cyclic photophosphorylation are ATP, NADPH and oxygen while the product of cyclic photophosphorylation is only ATP.
True.
False.
Thylakoid membrane is permeable to protons.
True.
False.
In Calvin cycle, ___ of the glyceraldehyde-3-phosphate produced is used for the biosynthesis of organic substances.
1/6
1/2
5/6
2/3
In photorespiration, oxygen acts as _______________ inhibitor and competes with carbon dioxide for the active site of the rubisco.
non-competitive
competitive
Photorespiration involves chloroplast, peroxisome and mitochondrion.
True.
False.
Light reaction occurs in thylakoid of chloroplast while dark reaction occurs in stroma of chloroplast.
True.
False.
Bundle sheath cells contain many _____ chloroplasts with less _____ grana and contain starch grains.
large, well-developed
small, well-developed
large, poorly
small, poorly
The first product formed in C3 plants is _______________ while the first product formed in C4 plants in _______________.
glycerate-3-phosphate, oxaloacetate
oxaloacetate, glycerate-3-phosphate
phosphoenolpyruvate, glyceraldehyde-3-phosphate
glyceraldehyde-3-phosphate, phosphoenolpyruvate
CAM plants _____ stomata during day and _____ stomata at night.
close, close
open, open
open, close
close, open
Increased carbon dioxide concentration _______________ the photosynthetic rate until a saturation point is reached.
increases
decreases
