Number of nitrogenous bases in a codon is
3
2
1
5
How many genes are present in E.coli?
200
320
231
None of these
tRNA is attached to mRNA by its
1 loop
II loop
III loop
IV loop
Mutation is more common when it is present in
recessive condition
dominant condition
constant in population
None of the above
In E.coli, which of the following classes of plasmids are found?
F-Factors
R-Factors
Col-Factors
all of these
The proteins are synthesized at
ribosomes
mitochondria
centrosomes
golgi bodies
Protein synthesis in an animal cell occurs
only on the ribosomes present in cytosol
on ribosomes present in cytoplasm as well as in mitochondria
only on ribosomes attached to the nuclear envelope and endoplasmic reticulum
on ribosomes present in the nucleolus as well as in cytoplasm
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
Two or more codons coding for one amino acid
non-ambiguous
degeneracy of codon
non-overlapping of codon
non-sense codon
