Nucleic Acid Structure and Function Practice Questions

Question 1

Which type of RNA contains codons for specific amino acids?

Accepted Answer

Messenger RNA (mRNA)

Answer

Transfer RNA (tRNA)

Answer

Small nuclear RNA (snRNA)

Answer

Ribosomal RNA (rRNA)

Question 2

If a sequence of 4 nucleotides codes for 1 amino acid, how many amino acids can be theoretically formed?

Accepted Answer

256

Answer

4

Answer

64

Answer

16

Question 3

Beta-alanine is derived from ?

Accepted Answer

Uracil

Answer

Adenosine

Answer

Guanosine

Answer

Thymine

Question 4

What is the most stabilizing force for nucleic acids?

Accepted Answer

Hydrogen bonds

Answer

Conformational entropy

Answer

Covalent bond

Answer

Van der Waals interaction

Question 5

What is Northern blot used to detect?

Accepted Answer

RNA

Answer

Protein

Answer

Immunoglobulin

Answer

DNA

Question 6

Nucleic acid is not found in which of the following?

Accepted Answer

Prions

Answer

Virus

Answer

Fungus

Answer

Bacteria

Question 7

Nucleic acid is not found in -

Accepted Answer

Prions

Answer

Bacteria

Answer

Fungus

Answer

Virus

Question 8

A sex worker presents with purulent urethral discharge and gram-negative diplococci in culture. What is the most likely diagnosis?

Accepted Answer

Neisseria gonorrhoeae

Answer

Treponema pallidum

Answer

Haemophilus ducreyi

Answer

Chlamydia trachomatis

Question 9

Which type of DNase produced by Streptococcus is known to be the most antigenic in humans?

Accepted Answer

DNase B

Answer

DNase C

Answer

DNase D

Answer

DNase A

Question 10

All are true about prions EXCEPT:

Accepted Answer

Contain nucleic acid

Answer

Protease resistant

Answer

Not affected by radiation

Answer

Cause spongiform changes

Nucleic Acid Structure and Function — MCQs

Nucleic Acid Structure and Function — MCQs

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