Molecular Basis of Inheritance · Question 47

What is the role of RNA polymerase III in the process of transcription in eukaryotes?

1. Transcribes only snRNAs
2. Transcribes rRNAs (28S, 18S and 5.8S)
3. Transcribes tRNA, 5S rRNA and snRNA
4. Transcribes precursor of mRNA

DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as

1. Polymorphic DNA
2. Satellite DNA
3. Repetitive DNA
4. Single nucleotides

Identify the correct statement.

1. Split gene arrangement is characteristic of prokaryotes
2. In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA
3. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria
4. The coding strand in a transcription unit is copied to an mRNA

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

1. T : 20 ; G : 25 ; C : 25
2. T : 20 ; G : 30 ; C : 20
3. T : 20 ; G : 20 ; C : 30
4. T : 30 ; G : 20 ; C : 20

Which of the following RNAs is not required for the synthesis of protein?

1. siRNA
2. mRNA
3. tRNA
4. rRNA

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

1. DNase
2. DNA dependent DNA polymerase
3. DNA dependent RNA polymerase
4. DNA Ligase

Which one of the following statements about histones is wrong?

1. Histones carry positive charge in the side chain
2. Histones are organized to form a unit of 8 molecules
3. The pH of histones is slightly acidic
4. Histones are rich in amino acids - Lysine and Arginine

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 true
2. Both Statement I and Statement II are true
3. Both Statement I and Statement II are false
4. Statement I is correct but Statement II is false

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 109 bp, then the length of the DNA is approximately

1. 2.7 meters
2. 2.0 meters
3. 2.5 meters
4. 2.2 meters

Which of the following statements is correct?

1. Adenine does not pair with thymine
2. Adenine pairs with thymine through one H-bond
3. Adenine pairs with thymine through two H-bonds
4. Adenine pairs with thymine through three H-bonds