DNA strands on a gel stained with ethidium bromide, when viewed under UV radiation, appear as:

1. Dark red bands

2. Bright blue bands

3. Yellow bands

4. Bright orange bands

A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is: 

During the process of gene amplification using PCR, very high temperature is not maintained in the beginning, then which of the following PCR will be affected first? 

1. Denaturation

2. Ligation

3. Annealing

4. Extension

Which of the following enzymes are used to join bits of DNA:

1. Ligase

2. Primase

3. DNA polymerase

4. Endonuclease

Genetic engineering involves:
1. Use of restriction endonuclease on bacterial DNA and formation of new traits
2. Use of Ligase for cutting DNA
3. Developing instruments
4. Use of statistic in genetics

A and B in the pBR 322, shown in the diagram given below, respectively represent recognition sequences of :

Recombinant DNA technology involves several steps in which initial step is of isolation of the DNA. Which enzymes are used in the process for the breakdown of fungal cell, plant cell and bacterial cell respectively?

1. Lysozyme, lipases, trypsin

2. Chitinase, cellulase, lysozyme

3. Chitinase, cellulase, trypsin

4. Trypsin, lipases, cellulase

The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of:

The DNA molecule to which the gene of interest is integrated for cloning is called: