Molecular Basis of Inheritance · Question 4

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

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

Who proposed that the genetic code for amino acids should be made up of three nucleotides?

1. Jacques Monod
2. Franklin Stahl
3. George Gamow
4. Francis Crick

Histones are enriched with -

1. Phenylalanine & Leucine
2. Phenylalanine & Arginine
3. Lysine & Arginine
4. Leucine & Lysine

Which factor is important for termination of transcription?

1. (rho)
2. (gamma)
3. (alpha)
4. (sigma)