Multiple Choice QuestionsWhich of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
Lysosome
Ribosome
Chloroplast
Chloroplast
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
Light saturation for CO2 fixation occurs at 10% of full sunlight
Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate
C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
C.
C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum
In C3 plants photosynthesis is decreased at higher temperature due to increased photorespiration. C4 plants have higher temperature optimum because of the presence of pyruvate phosphate dikinase enzyme, which is sensitive to low temperature.
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in :
C3 plants
C4 plants
C2 plants
C2 plants
Which of the following is not a product of light reaction of photosynthesis?
ATP
NADH
Oxygen
NADPH
Herbicide that blocks electrons transport from PS-II to PS-I by inhibiting electron flow between plastoquinone → Cytochrome is
DCMU
Paraquat
DCPIP
None of these
A plant is provided with the ideal conditions for photosynthesis and supplied with isotope 14 CO2. When the products of the process are analysed carefully, what would be the nature of products?
Glucose and oxygen are labelled
Oxygen is labelled, but glucose is normal
Glucose and oxygen are normal
Glucose is labelled, but oxygen is normal
Cotyledons and testa are edible parts of
groundnut and pomegranate
walnut and tamarind
french bean and coconut
cashew nut and litchi
Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/ phase in the cell cycle?
C-karyokinesis
S-synthetic phase
A-cytokinesis
B-metaphase
In photosynthesis carbon dioxide is converted to carbohydrates. It is a process.
Reductive
Oxidative
Catabolic and exergonic
None of the above
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