Match List-I (Operons) with List-II (Number of structural genes) and select the correct answer:
| List-I | List-II |
| a. Ara Operon of E. coli | 1. 9 structural genes |
| b. His Operon of Salmonella typhimurium | 2. 4 structural genes |
| c. Trp Operon of E. coli | 3. 5 structural genes |
| d. Leu Operon | 4. 3 structural genes |
A. a-1, b-3, c-4, d-2
B. a-2, b-4, c-1, d-3
C. a-3, b-1, c-4, d-2
D. a-4, b-1, c-3, d-2
Answer: Option D
Related Questions on Gentics and Evoloution
A piece of DNA molecule that can serve as a carrier for the gene to be cloned is called as a
A. Virus
B. Vector
C. DNA junk
D. Gene factor
A haploid organism contains only one set of chromosomes, and is said to be
A. Homozygous
B. Heterozygous
C. Hemizygous
D. Holozygous
Which of the following is the correct pair?
A. Darwin - Use and disuse of organs
B. de Vries - Mutation theory
C. Lamarck - Origin of life
D. Haldane - Law of heredity

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