Molecular Basis of Inheritance

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

1. 1
2. 11
3. 333
4. 33

During DNA replication, Okazaki fragments are used to elongate

1. The leading strand away from replication fork
2. The lagging strand towards replication fork
3. The lagging strand away from the replication fork
4. The leading strand towards replication fork

Which of the following RNAs should be most abundant in animal cell ?

1. m-RNA
2. mi-RNA
3. r-RNA
4. t-RNA

Spliceosomes are not found in cells of :

1. Bacteria
2. Plants
3. Animals
4. Fungi

The association of histone H1 with a nucleosome indicates :

1. DNA replication is occurring
2. Transcription is occurring
3. The DNA is condensed into a Chromatin Fibre
4. The DNA double helix is exposed

Which one of the following is the starter codon ?

1. AUG
2. UAG
3. UAA
4. UGA

Which of the following is required as inducer(s) for the expression of Lac operon?

1. lactose
2. lactose and galactose
3. glucose
4. galactose

A complex of ribosomes attached to a single strand of RNA is known as :

1. Polypeptide
2. Okazaki fragment
3. Polysome
4. Polymer

Which of the following is not required for any of the techniques of DNA fingerprinting available at present?

1. DNA – DNA hybridization
2. Polymerase chain reaction
3. Zinc finger analysis
4. Restriction enzymes

Taylor conducted the experiments to prove semiconservative mode of chromosome replication on

1. Vicia faba
2. Drosophila melanogaster
3. Vinca rosea
4. E. coli