CUET UG Biology Practice Test

1.Who performed on Vicia faba to prove that the DNA replicates semi-conservatively?
Taylor and colleagues
Stahl
Hershey and Chase
Matthew Meselson.

2. A thermostable DNA polymerase is isolated from
Thermus aquaticus
Agrobacterium tumefaciens
E.coli
Salmonella typhimurium

3. ELISA is based on the principle
antigen-antigen interaction
B cells and T cells interaction
Antigen-antibody interaction
T cell-antibody interaction

4. Which of the following represents a test cross in which half the offspring is heterozygous and half would be homozygous recessive?
tt x tt
Tt x Tt
Tt x tt
TT x tt

5.In which phase of cell cycle does replication of DNA takes place?
G1 phase
M phase
S phase
G2 phase

6. Which one of the following is not a process of DNA recombinant technology?
isolation of DNA
RNA interference
introduction of restriction endonucleases
culturing the host cells in a medium at a large scale

7. Which of the following gas is found in the stratosphere?
Hydrogen
Ozone
Methane
Carbon dioxide