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WorksheetsPlant Physiology
Total questions: 20
Worksheet time: 10mins
The first stable product of fixation of atmospheric nitrogen in leguminous plants is ?
NO3-
Glutamate
Ammonia
NO2-
Which of the following biomolecules is common to respiration - mediated breakdown of fats , carbohydrates , and proteins?
Fructose 1-6 bisphosphate
Pyruvic acid
Acetyl CoA
Glucose 6 - phosphate
Phytochrome is a
Glycoprotein
Lipoprotein
Chromoprotein
Flavoprotein
In photosynthesis , the light independent reactions takes place at:
Photosystem- II
Stromal matrix
Thylakoid lumen
Photosystem-I
During biological nitrogen fixation , inactivation of nitrogenase by oxygen poisoning is prevented by?
Carotene
Cytochrome
Leghaemoglobin
Xanthophyll
Water soluble pigment found in plant cell vacuoles are;
Chlorophylls
Carotenoids
Anthocyanins
Xanthophylls
A plant in your garden avoids photorespiratory losses , has improved water use efficiency , shows high rate of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
C4
CAM
Nitrogen fixer
C3
Emerson's enhancement effect and Red drophave been instrumental in the discovery of ?
Two photosystems operating simultaneously
Photophosphorylation and cyclic electron transport
Oxidative photophosphorylation
Photophosphorylation and non - cyclic electron transport
In a chloroplast the highest number of protons are found in;
Lumen of thylakoids
Inter membrane space
Antennae complex
Stroma
The process which makes major difference between C3 and C4 plants is ;
Calvin cycle
Photorespiration
Respiration
Glycolysis
Which statement is wrong about Kreb's cycle?
There is one point in the cycle where FAD+ is reduced to FADH2
During conversion of succinyl CoA to succinic acid , a molecule of GTP is synthesised
The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
There are three points in the cycle where NAD+ is reduced to NADH + H+
Fruit and leaf drop at early stages can be prevented by the application of;
Ethylene
Auxins
Gibberellic acid
Cytokinins
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in?
C4 plants
C2 plants
C3 and C4 plants
C3 plants
Which of the following is not a product of light reaction of photosynthesis?
NADPH
NADH
Oxygen
ATP
Stomatal movement is not affected by ;
O2 concentration
CO2 concentration
Light
Temperature
World Ozone Day is celebrated on ;
16th September
22nd April
21st April
5th June
Which of these statements is incorrect?
Glycolysis operates as long as it is supplied with NADthat can pick up hydrogen atoms
Oxidative phosphorylation takes place in outer mitochondrial membrane
Glycolysis occurs in cytosol
Enzymes of TCA cycle are present in mitochondrial matrix
What is the site of perception of photoperiod necessary for induction of flowering in plants?
Shoot apex
Leaves
Lateral buds
Pulvinus
It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants through the year to increase yield?
Gibberellin and Abscisic acid
Cytokinin and Abscisic acid
Auxin and Ethylene
Gibberellin and Cytokinin
Conversion of glucose to glucose-6- phosphate , the first irreversible reaction of glycolysis , is catalyzed by?
Enolase
Phosphofructokinase
Aldolase
Hexokinase
