Nucleic Acid MCQ Questions and Answers for Practice

Q: A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be comprised of

This question tests conceptual understanding. Review the topic carefully to determine the correct answer.

Q: A model of enzyme action is the

This question tests conceptual understanding. Review the topic carefully to determine the correct answer.

Q: According to the first law of thermodynamics,

This question tests conceptual understanding. Review the topic carefully to determine the correct answer.

Q: Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as .........is to ............

This question tests conceptual understanding. Review the topic carefully to determine the correct answer.

Q: Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

This question tests conceptual understanding. Review the topic carefully to determine the correct answer.

Master the fundamentals of Nucleic Acid with our specially curated multiple-choice questions (MCQs). Perfect for students and exam aspirants, these practice questions will enhance your understanding and prepare you for success.

About Nucleic Acid MCQ Questions

Nucleic Acid MCQs cover essential topics such as DNA structure, RNA functions, and genetic coding. These questions are designed to test your knowledge and understanding of the molecular biology of nucleic acids, ensuring a comprehensive grasp of the subject.

Why Practice Nucleic Acid Objective Questions?

Practicing Nucleic Acid MCQs offers numerous benefits. It helps you prepare for school and college exams, competitive exams, and job interviews. Regular practice enhances your problem-solving skills, reinforces key concepts, and boosts your confidence in tackling complex questions.

Who Should Use These MCQs?

Students preparing for school or college exams
Competitive exam aspirants
Candidates preparing for interviews

Nucleic Acid MCQ Questions for Practice

1. A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be comprised of

240 adenine and 240 cytosine molecules.
120 thymine and 120 adenine molecules.
240 guanine and 240 thymine molecules.
none of these

2. A model of enzyme action is the

active site model.
activator action model.
induced fit model.
none of these

3. According to the first law of thermodynamics,

the universe loses energy because of heat production.
systems rich in energy are intrinsically unstable and will give up energy with time.
energy can be neither created nor destroyed.
A and B only

4. Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as .........is to ............

exergonic; endergonic
work; energy
DNA and RNA.
none of these

5. Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

The phosphodiester bonds between deoxyribose sugars would be broken.
The two strands of the double helix would separate.
The pyrimidines would be separated from the deoxyribose sugars.
none of these

6. How can one increase the rate of a chemical reaction?

Add a catalyst.
Increase the entropy of the reactants.
Decrease the concentration of the reactants.
none of these

7. If an enzyme is added to a solution where its substrates and products are in equilibrium, what would occur?

The reaction would change from endergonic to exergonic.
Additional product would be formed.
Nothing; the reaction would stay at equilibrium.
none of these

8. If an enzyme solution is saturated with substrate, the most effective way to obtain an even faster yield of products is to

add more of the enzyme.
heat the solution to 90 degree Centigrade.
add an allosteric inhibitor.
none of these

9. In the double helix structure of nucleic acids, cytosine hydrogen bonds to

ribose.
guanine.
adenine.
none of these

10. Nucleic acids include

glucose and glycogen.
lipids and sugars.
DNA and RNA.
none of these

11. The structural feature that allows DNA to replicate is the

twisting of the molecule to form an Ã¡ helix.
sugar-phosphate backbone.
complementary pairing of the nitrogenous bases.
none of these

12. What name is given to the reactants in an enzymatically catalyzed reaction?

products
substrate
EA
none of these

13. Which of the following are nitrogenous bases of the purine type?

guanine and adenine
uracil and cytosine
cytosine and guanine
none of these

14. Which of the following are nitrogenous bases of the pyrimidine type?

thymine and guanine
cytosine and uracil
guanine and adenine
none of these

15. Which of the following describe(s) some aspect of metabolism?

synthesis of macromolecules
breakdown of macromolecules
control of enzyme activity
A, B, and C

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Nucleic Acid MCQ Questions and Answers for Practice

About Nucleic Acid MCQ Questions

Why Practice Nucleic Acid Objective Questions?

Who Should Use These MCQs?

Nucleic Acid MCQ Questions for Practice

1. A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be comprised of

2. A model of enzyme action is the

3. According to the first law of thermodynamics,

4. Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as .........is to ............

5. Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

6. How can one increase the rate of a chemical reaction?

7. If an enzyme is added to a solution where its substrates and products are in equilibrium, what would occur?

8. If an enzyme solution is saturated with substrate, the most effective way to obtain an even faster yield of products is to

9. In the double helix structure of nucleic acids, cytosine hydrogen bonds to

10. Nucleic acids include

11. The structural feature that allows DNA to replicate is the

12. What name is given to the reactants in an enzymatically catalyzed reaction?

13. Which of the following are nitrogenous bases of the purine type?

14. Which of the following are nitrogenous bases of the pyrimidine type?

15. Which of the following describe(s) some aspect of metabolism?

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