CSIR UGC NET JRF Life Sciences - Biology Practice Test on Nucleic acid DNA

This practice test is designed to assess your  knowledge in ‘DNA Structure and Function ’. 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.

Biology Practice Test on Nucleic acid (DNA)

1. Which one of the following statements a double helical molecule of DNA is true?
Each strand is identical
Each strand is parallel
Each strand replicates itself
Bases are perpendicular to the axis
2. Which one of the following statements about the structure of double helical B-DNA is correct
The forces that stabilize the DNA double helix
The molar amount of guanine plus cytosine equals the molar amount of adenine and thymine
The double helix contains antiparallel chains that form a major and minor groove on the surface of the helix
Within the double helix there are ten base pairs per turn of the helix
3. Which of the following choices best completes the following sentences: Histone are
basic proteins rich in lysine and/ or arginine
identical protamines
found in high concentrations in ribosomes
bound covalently attached to DNA
4. Complete acid hydrolysis of nucleic acids yields all of the following except
purines
pentoses
adenosine
cytosine
5. DNA is the major component of DNA
retrovirus
inducer
operon
histone
6. Which one of the following statements correctly describes eukaryotic DNA?
It is non linear
It is found in a single helix form in chromosomes
It uses DNA polymerase with nuclease activities
It is replicated bidirectionally at many points
7. Using written convention, which one of the following sequences is complementary to TGGCAGCCT?
ACCGTCGGA
ACCGUCGGA
AGGCTGCCA
TCCGACGGT
8. All the following statements regarding the nucleic acid DNA are true except
it shows homology in closely related species
it can be present as a single strand in some viruses
it codes for RNA in mitochondria
it is the genetic material of all viruses
9. Which one of the following human genes has the longest stretch of DNA (24Mb)?
Globin gene
Histone gene
Insulin gene
Dystrophin gene
10. In DNA, the deoxygenation is at
first carbon atom
second carbon atom
third carbon atom
fourth carbon atom
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