Science Group
Explore subjects and practice MCQs
10
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1,000
Total MCQs
Unit-7 Metabolism
Answer: Plants absorb minerals dissolved in water from the soil through their roots.
Answer: Human enzymes work best at the normal body temperature of about 37 degree Celsius.
Answer: NADP+ is reduced by accepting H+ and electrons to form NADPH in the light reaction.
Answer: Energy released from breaking down food is used to synthesize ATP, which stores it temporarily.
Answer: Green plants make their own food by photosynthesis, so they are autotrophs.
Answer: These are the main factors that affect the rate of photosynthesis.
Answer: Fungi and animals cannot make their own food and depend on other organisms, so they are heterotrophs.
Answer: Oxygen accepts electrons and H+ to form water, the final product of the electron transport chain.
Answer: Plants use carbon dioxide and water in the presence of light and chlorophyll to make glucose.
Answer: The diaphragm contracts and relaxes to change the volume of the chest cavity during breathing.
Answer: Oxygen and carbon dioxide are exchanged between air and blood in the lungs.
Answer: Breathing is the physical exchange of gases, while cellular respiration is the chemical breakdown of glucose to release energy.
93
Answer: Reducing pyruvate regenerates NAD+, which is needed to keep glycolysis running in the absence of oxygen.
Answer: Carbon dioxide is a raw material consumed in photosynthesis, not a product of it.
95
Answer: NADH and FADH2 carry high-energy electrons and hydrogen to the electron transport chain.
Answer: Energy in the form of ATP is one of the main products of aerobic respiration.
Answer: Oxygen is consumed as the final electron acceptor in the electron transport chain.
Answer: The enzymes of the Calvin cycle denature above about 45 degree Celsius, halting the dark reactions.
Answer: Glucose is the main fuel broken down during cellular respiration to release energy.
Answer: Carbon dioxide can only accelerate photosynthesis if light and other factors are available in sufficient amounts.