Questions on Chargaff Rule (MCQ PDF

Chargaff’s rule is a key principle in molecular biology, stating that in DNA, the proportion of adenine (A) always equals that of thymine (T), and guanine (G) always equals cytosine (C). This A=T and G=C ratio varies between species but remains constant within an organism. This discovery helped Watson and Crick deduce the double-helix structure of DNA, showing how the complementary base pairs form hydrogen bonds, maintaining the stability and replication mechanism of the DNA molecule. This is article is about MCQ Questions on Chargaff Rule with answers. You can download this question as PDF from the download link provided in the results page of this quiz.

Molecular Biology Notes  |  Molecular Biology PPTs  |  Molecular Biology MCQs

1. 
Chargaff's rule states that in a double-stranded DNA molecule, the ratio of purines to pyrimidines is:

2. 
If the DNA of a species has 30% guanine, what is the expected percentage of cytosine?

3. 
Which of the following best explains why Chargaff's rule does not apply to single-stranded RNA?

4. 
The fact that Chargaff's rule is universally applicable across species suggests that:

5. 
If the DNA of a bacterium has 35% adenine, what would be the percentage of guanine?

6. 
Which observation led Chargaff to conclude that DNA base composition varies between species?

7. 
Which of the following statements about Chargaff’s rule is incorrect?

8. 
In the context of Chargaff’s rule, why do organisms with higher G+C content have more stable DNA?

9. 
If a researcher finds that a sample of DNA contains 40% cytosine, what is the expected percentage of adenine in this sample?

<<< Back to Molecular Biology MCQ Page

I hope you found this MCQ Quiz on Questions on Chargaff Rule is informative and beneficial. Your feedback and comments would be greatly appreciated. Whether you have suggestions, questions, or thoughts to share, I would be delighted to hear from you. Engaging with your comments helps me continue to produce high-quality content in Biology. Please feel free to leave a comment below. Thank you for your support.
Regards: Admin, EasyBiologyClass

Want to read offline? You can download the full MCQ set with an answer key in PDF format. The link for downloading the PDF is availabe in the result page. You are requested to submit your answers to get the result page.

More Multiple Choice Questions (MCQs)...
BOTANYBIOCHEMISTRYBIOTECHNOLOGY
ZOOLOGYCELL BIOLOGYIMMUNOLOGY
ECOLOGYMOLECULAR BIOLOGYANIMAL PHYSIOLOGY
GENETICSBIOINFORMATICSPLANT PHYSIOLOGY
EVOLUTIONBIOPHYSICSDEVELOPMENTAL BIOLOGY
MICROBIOLOGYBIOSTATISTICSRESEARCH METHODOLOGY

Leave a Reply

Your email address will not be published. Required fields are marked *