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Multiple Choice Quiz on Nucleic Acid - DNA

This quiz is designed to assess your basic knowledge in ‘nucleic acid (DNA). Questions come under ‘hard’ 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.
DNA

1. If the percentage of adenine in a DNA sample is 20%. What would be the percentage of other bases?
T=30%,G=20%,C=30%
T=40%,G=20%,C=20%
T=20%,G=30%,C=30%
T=20%,G=20%,C=40%
2. Which of the following statement is incorrect
DNA is the only biomolecule with self repair mechanism
DNA is autocatalytic
DNA is heterocatalytic
Increasing temperature to 90-100 degree breaks phosphodiester bonds in DNA
3. . In a DNA sample, the percentage on bases is G=30% and C=40%. The most probable explanation is
Mutation might have occurred
The DNA sample may be a bacterial genome
The DNA sample may be a viral genome
none of these
4. Which of the following statement is true?
DNA bases varies from one species to another
DNA bases of a species does not change with age nutritional state and environment
DNA base remains same in different tissues of the same individual
All of these
5. The negative charge of DNA is due to
Sugar, phosphate and amino acids
Deoxy ribose sugar
Nitrogenous bases specifically adenine
Phosphate group
6. The amount of DNA in a cell can be altered by
Ecological factors
Environmental factors
Physiological factors
Cannot be altered
7. The amount of DNA of a cell at the beginning of mitosis is
Half of the amount found in cells at G1 stage
Same as the amount found in cells at G1 stage
twice the amount found in cells at G1 stage
four times the amount found at G1 stage
8. The DNA found in all living organisms is
Left handed DNA
Right handed DNA
Both a and b
Z-DNA
9. The DNA strand is directly involved in the formation of all except
protein
another DNA strand
mRNA molecule
tRNA molecule
10. Which of the following statement is wrong
A-DNA is the dehydrated form of DNA
The naturally occurring DNA is B-DNA and is also called as wet DNA
Z DNA is also called zig-zag DNA and is a right handed helix
Z-DNA occurs in dehydrated high salt concentration
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