Multiple Choice Quiz on DNA Structure

This quiz is designed to assess your basic knowledge in ‘DNA Structure‘. Questions come under ‘medium’ category. Choose the best answer from the four options given. When you've finished answering as many of the questions as you can, scroll down to the bottom of the page and check your answers by clicking 'Score'. Percentage score will be displayed along with right answers.

1. A nucleoside is
A nucleotide without sugar
A nucleotide without phosphate
A nucleotide without nitrogenous base
A nucleotide without sugar only
2. The adjacent nucleotides are joined by
Ionic bond
Hydrogen bond
Phosphodiester bond
All of these
3. According to Chargaff’s rule, in a DNA molecule
The amount of Adenine and thymine= The amount of guanine and cytosine
The amount of cytosine and Guanine= The amount of adenine and cytosine
The amount of Adenine and Guanine= The amount of thymine and cytosine
All of these
4. Watson and Cricks double helical DNA is a
5. The two strands in a DNA double helix are joined by
Hydrogen bonds between sugars
Phosphodiester bonds between sugars
Hydrogen bonds between bases
Phosphodiester bonds between sugars
6. Who all got the Nobel prize for discovering the structure of DNA double helix
Watson and Crick
Watson, Crick and Wilkins
Watson, Crick and Franklin
Watson, Crick and Pauling
7. The diameter of DNA helix is
10 Angstrong
21 Angstrong
2 nm
8. The distance between two adjacent nucleotide is
6.8 Angstrong
3.4 Angstrong
1.7 Angstrong
10 Angstrong
9. DNA is
Positively charged
Negatively charged
none of these
10. Which of the following statement is true
The two DNA strands are parallel and complementary
The two DNA strands are anti parallel and non-complementary
The two DNA strands are anti-parallel and complementary
None of these
Score =
Correct answers:
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