Science Group
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10
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1,000
Total MCQs
FBISE Biology
Answer: Autotrophs such as green plants make their own food through photosynthesis.
Answer: RQ is the volume of CO2 produced divided by the volume of O2 consumed.
Answer: Glycolysis produces two pyruvate molecules, each entering the Krebs cycle once, so two turns occur per glucose.
Answer: Heterotrophs depend on other organisms for their food and energy.
Answer: When light is scarce it limits the rate of photosynthesis even if other factors are plentiful.
Answer: Photosynthesis builds complex glucose from simple molecules, so it is an anabolic reaction.
Answer: Water is split by light energy during the light reaction to release oxygen, H+ and electrons.
Answer: Two decarboxylation steps in each Krebs cycle turn release two CO2 molecules.
Answer: Respiration breaks down glucose into simpler products, so it is a catabolic reaction.
Answer: NADP+ is reduced to NADPH during the light reaction and is later used in the Calvin cycle.
Answer: ATP supplies energy instantly because it can release energy quickly by breaking a phosphate bond.
Answer: CO2 diffuses into leaves through stomatal pores present on the leaf surface.
Answer: The proton (H+) gradient built across the inner membrane drives ATP synthase to make ATP.
Answer: Alcoholic fermentation in yeast releases carbon dioxide along with ethanol.
Answer: High temperature denatures the enzymes of photosynthesis, slowing the reactions even in bright light.
Answer: Anaerobic respiration in muscles produces lactic acid, which can cause fatigue and cramps.
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Answer: Respiration is a continuous process and occurs in plants day and night.
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Answer: Two ATP are used to phosphorylate glucose before the energy-yielding steps of glycolysis begin.
Answer: Light energy is trapped by chlorophyll and converted into chemical energy stored in glucose.
Answer: Photosynthesis requires light and chloroplasts, which are present in green parts of the plant.