Question

Number of bp in genome of ϕ × 174 virus
1. 48502
2. 5386
3. 4.6 × 10⁶
4. 6.6 × 10⁹

Answer 1

Correct Answer - Option 2 : 5386

Concept-

• The virus which infects the bacteria is called bacteriophage.
• A bacteriophage is generally a double-stranded DNA virus.
• In QB - bacteriophage - ss RNA is present.
• In ϕ X 174 - bacteriophage - ss DNA is present.
• A bacteriophage is of two types- Non-infective phages and infective phage.

Explanation-

• DNA is a long polymer of deoxyribonucleotides.
• The length of DNA is usually defined as a number of nucleotides (or a pair of nucleotides referred to as base pairs) present in it.
• This also is the characteristic of an organism.

A bacteriophage known as ϕ ×174 has 5386 bp.

• Escherichia coli has 4.6 × 10⁶ bp.
• The haploid content of human DNA is 3.3 × 10⁹ bp.
• Bacteriophage lambda has 48502 base pairs (bp).