Consider the following statements:

I. RNA is the genetic material of the QB bacteriophage

II. DNA chemically is less reactive and more stable than RNA

III. Viruses having RNA genome and having shorter life span mutate & evolve slowly.

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

I. Inheritance of a character is affected by promoter and regulatory sequences of a structural gene.
II. The split-gene arrangement represents an ancient feature of the genome.

III. The process of splicing represents the dominance of RNA world.

which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

I. All the reference point while defining a transcription unit is made with coding strand

II. It is the presence of a promoter in a transcription unit that also defines the template and coding strands

III. Exons are said to be sequences that do not appear in mature or processed RNA

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Consider the following statements:

I. Deoxyribonucleoside triphosphates act as substrates as well as provide energy for polymerization reaction during DNA replication.

II. The replication of DNA is both semiconsenvative and semi- discontinuous

III. In bacterial DNA replication there are multiple ori and replication fork moves bi-directionally

Which of the above statements are true?

1. I and II only

2. I and III only

3. II and III only

4. I, II and III

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Codes

             I           II         III         IV

(1)         1           2           3           4

(2)         2           1           4           3

(3)         2           1           3           4

(4)         1           2           4           3

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 teh RNA becomes 998 bases, how many codons will be altered?

(1) 1

(2) 11

(3) 33

(4) 333

DNA fragments are

(1) positively charged

(2) negatively charged

(3) neutral

(4) either positively or negatively charged depending on their size

During DNA replication, Okazaki fragments are used to elongate

(1) The leading strand towards replication fork

(2) The lagging strand towards replication fork

(3) The leading strand away from replication fork

(2) The lagging strand away from replication fork

Spliceosomes are not found in cells of 

(1) plants

(2) fungi

(3) animals 

(4) bacteria

The final proof for DNA as the genetic material come from the experiments of 

1. Griffith

2. Hershey and chase 

3. Avery, Macleod and McCarty 

4.  Hargobind Khorana