Molecular Basis of Inheritance · Question 37

In an E. coli strain i gene gets mutated and its product cannot bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

1. Only z gene will get transcribed
2. z, y, a genes will be transcribed
3. z, y, a genes will not be translated
4. RNA polymerase will bind the promoter region

Ten E. coli cells with 15N-dsDNA are incubated in medium containing 14N nucleotide. After 60 minutes, how many E. coli cells will have DNA totally free from 15N?

1. 20 cells
2. 40 cells
3. 60 cells
4. 80 cells

In lac operon, z gene codes for

1. Transacetylase
2. β-galactosidase
3. Permease
4. Repressor

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

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

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

1. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
2. (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
4. (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)

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

1. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
2. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
3. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

If DNA contained sulfur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?

1. Radioactive phosphorus in bacterial cells
2. No radioactive sulfur in bacterial cells
3. Both radioactive sulfur and phosphorus in bacterial cells
4. Radioactive sulfur in bacterial cells

Against the codon 5' UAC 3', what would be the sequence of anticodon on tRNA?

1. 5' GUA 3'
2. 5' AUG 3'
3. 5' ATG 3'
4. 5' GTA 3'

If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G?

1. T : 20%, G : 20%
2. T : 20%, G : 30%
3. T : 30%, G : 20%
4. T : 30%, G : 30%

Complete the flow chart on central dogma. [figure]

1. (a) - Transduction; (b) - Translation; (c) - Replication; (d) - Protein
2. (a) - Replication; (b) - Transcription; (c) - Transduction; (d) - Protein
3. (a) - Translation; (b) - Replication; (c) - Transcription; (d) - Transduction
4. (a) - Replication; (b) - Transcription; (c) - Translation; (d) - Protein