Write the full form of VNTR.How is VNTR different from 'probe'?

2

(a)

Mention the role of ribosomes in peptide bond formation. How does ATP facilitate it?

2

(a)

Depending upon the chemical nature of template (DNA or RNA) and the nature of nucleic acids synthesised from it ?(DNA and RNA) list the types of nucleic acid polymerases

2

(a)

How did Hershey and chase differentiate between DNA and protein in their experiment while proving that DNA is the genetic material?

2

(a)

What is a promoter in a transcription unit? Where is it located in DNA with reference to the structural gene(s)?

2

(a)

how is the first ribonucleotide different from others in the RNA chain?

2

(a)

What changes happen during processing of RNA?

2

(a)

Study the figure below and answer the questions:

(a)What does the figure express?
(b)When does the transcription of lac mRNA stop?
(c)Name the enzyme transcribed by the gene 'Z'

2

(a)

What do you understand by genome.

2

(a)

Name the scientists who started the DNA finger printing technique in India.

2

(a)

In the medium where E.coli was growing, lactose was added ,which induced the lac operon.Then, why does lac operon shut down sometimes after addition of lactose in the medium?

2

(a)

Name a few enzymes involved in DNA replication other than DNA polymerase and ligase. Name the key function for each of them.

2

(a)

State the difference between the structural genes in a transcription unit of prokaryotes and eukaryotes.

2

(a)

Draw a neat labelled sketch of a replicating fork of DNA.

2

(a)

Differentiate between a cistron and an exon.

2

(a)