Questions 31–40 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 4 of 7

Question 21

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The solution of

is __________.

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Question 22

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The median value for the dataset (12, 10, 16, 8, 90, 50, 30, 24) is __________.

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Question 23

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The degree of reduction for acetic acid (C₂H₄O₂) is __________.

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Question 24

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The mass of 1 kmol of oxygen molecules is ______ g (rounded off to the nearest integer).

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Question 25

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Protein concentration of a crude enzyme preparation was 10 mg mL⁻¹. 10 μL of this sample gave an activity of 5 μmol min⁻¹ under standard assay conditions. The specific activity of this crude enzyme preparation is __________ units mg⁻¹.

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Question 26

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In general, which one of the following statements is NOT CORRECT?
Your answerChoose one option.

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Question 27

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For site-directed mutagenesis, which one of the following restriction enzymes is used to digest methylated DNA?
Your answerChoose one option.

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Question 28

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Match the organelles in Group I with their functions in Group II.
Group I P. Lysosome Q. Smooth ER R. Golgi apparatus S. Nucleolus
Group II
Digestion of foreign substances
Protein targeting
Lipid synthesis
Protein synthesis
rRNA synthesis
Your answerChoose one option.

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Question 29

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Which of the following statements are CORRECT when a protein sequence database is searched using the BLAST algorithm?
P. A larger E-value indicates higher sequence similarity Q. E-value < 10⁻¹⁰ indicates sequence homology R. A higher BLAST score indicates higher sequence similarity S. E-value > 10¹⁰ indicates sequence homology
Your answerChoose one option.

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Question 30

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Which one of the following is coded by the ABO blood group locus in the human genome?
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