MCQ Collection
Queensland QCE Sciences MCQs
Practice Queensland QCE Sciences questions with answers and explanations.
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Correct Answer: C. It lowers activation energy without being consumed.
Explanation:
Enzymes alter reaction rate by lowering activation energy.
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Correct Answer: C. Two genetically similar daughter cells with the same chromosome number.
Explanation:
Mitosis supports growth and repair.
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Correct Answer: A. Two genetically similar daughter cells with the same chromosome number.
Explanation:
Mitosis supports growth and repair.
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Correct Answer: D. 1 × 10⁻2 mol L⁻¹
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Correct Answer: A. 10.82
Explanation:
P=E/t=10.82 W.
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Correct Answer: D. To estimate what happens without the experimental treatment.
Explanation:
A control provides a comparison baseline.
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Correct Answer: B. 3/4
Explanation:
AA and Aa show the dominant phenotype: 3 of 4 expected offspring.
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Correct Answer: A. 0.025
Explanation:
After 2 half-lives, amount=0.1/2^2=0.025.
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Correct Answer: B. 1.31
Explanation:
I=V/R=1.31 A.
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Correct Answer: A. 78
Explanation:
Mass=nM=3×26=78 g.
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Correct Answer: D. It lowers activation energy without being consumed.
Explanation:
Enzymes alter reaction rate by lowering activation energy.
