How many genes are present in E.coli?
200
320
231
None of these
In E.coli, which of the following classes of plasmids are found?
F-Factors
R-Factors
Col-Factors
all of these
The number of punctuation codons in a genetic code are
2+3=5
1+3=4
1+1=2
3
Signaling between cells usually results in the activation of protein
lipases
kinases
proteases
nucleases
Haploids are more suitable for mutation studies than the diploids.This is because
haploids are reproductively more stable that diploids
mutagens penetrate in haploids more effectively than in diploids
haploids are more abundant in nature than diploids
all mutations whether dominant or recessive are expressed in haploids
RNA polymerase stops its activity by
rho(ρ)factor
sigma (σ) factor
UAG
AUG
What is antisense technology?
A cell displaying a foreign antigen used for synthesis of antigens
Production of somaclonal variants in tissue cultures
When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
RNA polymerase producing DNA
The one aspect which is not a salient feature of genetic code, is its being
degenerate
ambiguous
universal
specific
The technique involving insertion of a desired gene into the DNA of plasmid vector is known as
Dressing
splicing
cloning
drafting
When a mutation is limited to the substitution of one nucleotide for another it is called
translocation
point mutation
base inversion
sugar phosphate deletion
