Respiration in Plants
Q. During which part of the day do plants primarily perform respiration?
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A.
Daytime only
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B.
Nighttime only
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C.
Both day and night
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D.
Only during photosynthesis
Solution
Plants perform respiration both day and night, although photosynthesis occurs primarily during the day.
Correct Answer: C — Both day and night
Q. In which part of the plant does cellular respiration primarily occur?
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A.
Roots
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B.
Leaves
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C.
Stems
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D.
All parts
Solution
Cellular respiration occurs in all parts of the plant, as all cells require energy to function.
Correct Answer: D — All parts
Q. What gas is primarily consumed during the respiration process in plants?
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A.
Oxygen
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B.
Carbon dioxide
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C.
Nitrogen
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D.
Hydrogen
Solution
Oxygen is primarily consumed during respiration, as it is used to oxidize glucose to release energy.
Correct Answer: A — Oxygen
Q. What is the end product of anaerobic respiration in plants?
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A.
Lactic acid
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B.
Ethanol
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C.
Carbon dioxide
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D.
Glucose
Solution
The end product of anaerobic respiration in plants is ethanol, which is produced when oxygen is not available.
Correct Answer: B — Ethanol
Q. What is the main difference between aerobic and anaerobic respiration in plants?
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A.
Oxygen requirement
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B.
Energy yield
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C.
Location in the plant
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D.
Type of glucose used
Solution
The main difference is that aerobic respiration requires oxygen, while anaerobic respiration does not.
Correct Answer: A — Oxygen requirement
Q. What is the primary purpose of respiration in plants?
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A.
To produce glucose
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B.
To release energy
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C.
To absorb carbon dioxide
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D.
To synthesize chlorophyll
Solution
The primary purpose of respiration in plants is to release energy from glucose, which is used for various metabolic processes.
Correct Answer: B — To release energy
Q. What is the relationship between photosynthesis and respiration in plants?
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A.
They are the same process
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B.
Photosynthesis produces oxygen for respiration
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C.
Respiration produces glucose for photosynthesis
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D.
They occur in different organisms
Solution
Photosynthesis produces oxygen, which is then used in respiration, highlighting their interdependent relationship.
Correct Answer: B — Photosynthesis produces oxygen for respiration
Q. Which of the following is a byproduct of respiration in plants?
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A.
Oxygen
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B.
Glucose
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C.
Carbon dioxide
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D.
Starch
Solution
Carbon dioxide is a byproduct of respiration, released when glucose is broken down for energy.
Correct Answer: C — Carbon dioxide
Q. Which of the following processes occurs during plant respiration?
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A.
Photosynthesis
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B.
Glycolysis
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C.
Transpiration
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D.
Nitrogen fixation
Solution
Glycolysis is a key process that occurs during respiration, breaking down glucose to release energy.
Correct Answer: B — Glycolysis
Q. Which organelle is primarily responsible for respiration in plant cells?
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A.
Chloroplast
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B.
Mitochondria
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C.
Nucleus
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D.
Endoplasmic reticulum
Solution
Mitochondria are the organelles responsible for respiration, where energy production occurs.
Correct Answer: B — Mitochondria
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