Protein synthesis in an animal cell occurs:
 

1.	On ribosomes present in cytoplasm as well as in mitochondria
2.	On ribosomes present in the nucleolus as well as in the cytoplasm
3.	Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
4.	Only on the ribosomes present in the cytosol

Production of a human protein in bacteria by genetic engineering is possible because:

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is the sequence called -

1. CAAT box

2. GGTT box

3. AAAT box

4. TATA box

A cup has ${10}^5$ bacterial cells. Each bacterial cell divides in 35 minutes. What shall be the number of bacteria after 175 min?

Which of the following exercises control over transcription:
1.  Operator
2.  Regulator
3.  Promoter
4.  Recon

Transduction in bacteria is carried out by:
1.  Bacteriophage
2.  B.G.A.
3.  Mycoplasma
4.  Rickettsiae

Variations in proteins are due to:
1.  Sequence of amino acids
2.  Number of amino acids
3.  R–group
4.  None

Segments of DNA which can move in a genome:
1.  Transposons
2.  Introns
3.  Exons
4.  Cistrons

A sequence of how many nucleotides in messenger RNA make a codon for an amino acid:

1. Four

2. One

3. Two

4. Three

In transgenics expression of a transgene in the target tissue is determined by:

1. Transgene

2. Promoter

3. Reporter

4. Enhancer