Molecular Basis of Inheritance · Question 168

In the lac operon, the z gene codes for :

1. the repressor of lac operon
2. transacetylase
3. permease
4. beta-galactosidase

Arrange the following steps of DNA fingerprinting in a correct sequence. Choose the correct answer from the options given below :

1. A, E, B, C, D
2. A, D, B, E, C
3. A, B, D, C, E
4. A, E, C, B, D

Which of the following statements are correct with reference to a transcription unit? Choose the correct answer from the options given below:

1. B, C, D and E only
2. A, B, C, D and E
3. A, B, C and D only
4. A, C, D and E only

Which of the following statements are correct with reference to packaging of DNA helix ? Choose the correct answer from the options given below :

1. B, D and E only
2. A, B and D only
3. C, D and E only
4. A, C and E only

Which of the following statements about lac-operon is correct?

1. Galactose can act as an inducer of lac operon
2. Gene i is constitutively expressed
3. Lactose activates repressor to bind to the operator
4. Genes i, z, y and a share single common promoter

Which of the following enzymes synthesizes precursor mRNA?

1. DNA polymerase
2. RNA polymerase I
3. RNA polymerase II
4. RNA polymerase III

Which chromosome in the human genome has the highest number of genes?

1. Chromosome 1
2. Chromosome 10
3. Chromosome X
4. Chromosome Y

Match List-I with List-II Choose the correct answer from the options given below:

1. A-IV, B-III, C-I, D-II
2. A-III, B-II, C-IV, D-I
3. A-II, B-IV, C-I, D-III
4. A-IV, B-II, C-I, D-III

Which of the following are the post-transcriptional events in a eukaryotic cell? Choose the correct answer from the options given below :

1. B, C, E only
2. C, D, E only
3. A, B, C only
4. B, C, D only

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but statement II is incorrect
2. Statement I is incorrect but statement II is correct
3. Both statement I and statement II are correct
4. Both statement I and statement II are incorrect