Match List – I with List – II.
| List - I | List - II |
| (A) Bacteriophage lambda | (I) 231 gene |
| (B) Y-chromosome of human | (II) 48502 bp |
| (C) Escherichia coli DNA | (III) \(3.3 \times 10^9\) bp |
| (D) Haploid content of human DNA | (IV) \(4.6 \times 10^6\) bp |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
(A) Bacteriophage lambda — this matches (II) 48502 bp. Its DNA length.
(B) Y-chromosome of human — this matches (I) 231 gene. The Y chromosome has the fewest genes (231).
(C) Escherichia coli DNA — this matches (IV) \(4.6 \times 10^6\) bp. Its genome length.
(D) Haploid content of human DNA — this matches (III) \(3.3 \times 10^9\) bp. The human haploid genome.
NCERT Extract:
The DNA – “DNA is a long polymer of deoxyribonucleotides. The length of DNA is usually defined as number of nucleotides (or a pair of nucleotide referred to as base pairs) present in it. This also is the characteristic of an organism. For example, a bacteriophage known as φ×174 has 5386 nucleotides, Bacteriophage lambda has 48502 base pairs (bp), Escherichia coli has 4.6 × 106 bp, and haploid content of human DNA is 3.3 × 109 bp. Let us discuss the structure of such a long polymer.”
Salient Features of Human Genome – “(viii) Chromosome 1 has most genes (2968), and the Y has the fewest (231).”