Metabolisme Practice Questions
UN (Indonesia) · UN Biologi · 146 free MCQs with instant results and detailed explanations.
146
Total
44
Easy
72
Medium
30
Hard
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Sample Questions from Metabolisme
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Q1
Easy
Which of the following best describes metabolism?
A.
The sum of all biochemical reactions in an organism.
B.
The process of respiration only.
C.
The breakdown of glucose only.
D.
The absorption of nutrients through the intestine.
Show Answer & Explanation
Correct Answer: A
Metabolism refers to all the chemical processes that occur within a living organism to maintain life, including both the breakdown of molecules for energy and the synthesis of new molecules.
Q2
Easy
Which of the following is an example of catabolism?
A.
Synthesis of proteins from amino acids.
B.
Conversion of glucose to pyruvate during glycolysis.
C.
Formation of starch from glucose.
D.
Photosynthesis in plants.
Show Answer & Explanation
Correct Answer: B
Catabolism involves breaking down larger molecules into smaller ones, releasing energy. The conversion of glucose to pyruvate in glycolysis is a key catabolic pathway.
Q3
Easy
What is the primary purpose of cellular respiration?
A.
To produce glucose for photosynthesis.
B.
To generate ATP from organic molecules.
C.
To convert light energy into chemical energy.
D.
To synthesize lipids for storage.
Show Answer & Explanation
Correct Answer: B
The primary purpose of cellular respiration is to convert organic molecules into ATP (adenosine triphosphate), which is the energy currency of the cell, providing energy for various cellular activities.
Q4
Medium
Which of the following processes occurs in the cytoplasm and does not require oxygen?
A.
Glycolysis
B.
Citric Acid Cycle
C.
Electron Transport Chain
D.
Photosynthesis
Show Answer & Explanation
Correct Answer: A
Glycolysis is the process that breaks down glucose into pyruvate in the cytoplasm and does not require oxygen, making it anaerobic.
Q5
Medium
In the context of cellular respiration, what is the main purpose of the Krebs Cycle?
A.
To produce ATP
B.
To generate carbon dioxide
C.
To produce electron carriers
D.
To synthesize glucose
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Correct Answer: C
The main purpose of the Krebs Cycle is to produce electron carriers (NADH and FADH2) which are used in the electron transport chain to generate ATP.
Q6
Medium
Which molecule is considered a direct energy carrier in cellular metabolism?
A.
Glucose
B.
ATP
C.
NADH
D.
FADH2
Show Answer & Explanation
Correct Answer: B
ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy directly for various metabolic processes.
Q7
Medium
What is the end product of anaerobic respiration in yeast?
A.
Lactic acid
B.
Ethanol
C.
Acetic acid
D.
Carbon dioxide
Show Answer & Explanation
Correct Answer: B
The end product of anaerobic respiration in yeast is ethanol (alcohol) along with carbon dioxide, as yeast ferments sugars in the absence of oxygen.
Q8
Hard
Which of the following is a primary product of the light-dependent reactions of photosynthesis that is utilized in the Calvin cycle?
A.
ATP
B.
NADH
C.
Oxygen
D.
Glucose
Show Answer & Explanation
Correct Answer: A
ATP is generated during the light-dependent reactions of photosynthesis and is essential for the Calvin cycle, where it provides the energy needed for the conversion of carbon dioxide into glucose.
Q9
Hard
In cellular respiration, which of the following pathways produces the highest amount of ATP from one molecule of glucose?
A.
Glycolysis
B.
Fermentation
C.
Krebs Cycle
D.
Electron Transport Chain
Show Answer & Explanation
Correct Answer: D
The Electron Transport Chain (ETC) produces the most ATP during cellular respiration by utilizing the high-energy electrons from NADH and FADH2 to create a proton gradient that drives ATP synthesis through oxidative phosphorylation.
Q10
Hard
Which of the following statements about photosynthesis and cellular respiration is true?
A.
Photosynthesis occurs in mitochondria while respiration occurs in chloroplasts.
B.
Both processes involve electron transport chains and the production of ATP.
C.
Photosynthesis does not require sunlight but respiration does.
D.
Cellular respiration occurs only in plants, while photosynthesis occurs in animals.
Show Answer & Explanation
Correct Answer: B
Both photosynthesis and cellular respiration involve electron transport chains that facilitate the production of ATP, highlighting their interconnected roles in energy metabolism.
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Metabolisme — UN (Indonesia) UN Biologi Practice Questions Online
This page contains 146 practice MCQs for the chapter Metabolisme in UN (Indonesia) UN Biologi. The questions are organized by difficulty — 44 easy, 72 medium, 30 hard — so you can choose the right level for your preparation.
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