In which direction mRNA is synthesized on DNA template?
5' → 3'
3' → 5'
Both (a) and (b)
Any of these
A mutant strain of T4 -bacteriophage R-II, fails to lyse the E. coli, but when two strains R - IIx and R - IIy are mixed then they lyse the E.coli. What may be the possible reason?
Bacteriophage transforms in wild
It is not mutated
Both strains have similar cistrons
Both strains have different cistrons
When a single gene influences more than one traits it is called
pleiotropy
epistasis
pseudodominance
multiple allelism
Plasmid is:
fragment of DNA which acts as vector
a fragment which joins two genes
mRNA which acts as carrier
autotrophic fragment
During replication of DNA, its two strands separate. Each of these serves as a template for the formation of new strands. Such type of replication is called:
Non-conservative
Semi-conservative
Flexible
Conservative
A and B genes are linked. What shall be the genotype of progeny in a cross between AB/ab and ab/ab?
AAbb and aabb
AaBb and aabb
AABB and aabb
Identify the type which has no genotype characters.
BBYY
BBYy
BbYY
bbyy
Mental retardation in man, associated with sex chromosomal abnormality is usually due to
reduction in X-complement
increase in X-complement
moderate increase in Y-complement
large increase in Y-complement
Protein synthesis in an animal cell takes place
only in the cytoplasm
in the nucleolus as well as in the cytoplasm
in the cytoplasm as well as in mitochondria
only on ribosomes attached to a nucleus
Expression of dominant character along with recessive character in a side by side manner in the F1 generation is called:
Complementary genes
Co-dominance
Multiple allele
Inheritance
