Glucose molecules diffuse across a cell of diameter d in time τ. If the cell diameter I tripled, the diffusion time would
Increase to 9 τ
Decrease to τ/3
Increase to 3 τ
Decrease to τ/9
In all four gametes AB, aB, Ab and ab are formed in equal probability. Then arrangement of chromosomes at metaphase - I of meiosis will be :-
Which cycle has been used in hetero lactic fermentation?
Entner-Doudoroff pathway
Phosphoketolase pathway
Pentose Phosphate pathway
Glycolate pathway
The characteristic of mitochondrial genome is?
Intron free DNA
Repetitive DNA
Polycistronic RNA
Satellite DNA
Among the following which cell can divide by binary fission.
Muscle cell
Nerve cell
RBC
Bone marrow cell
Cell with large round size has more chance to survive as compare to thin cell under desiccation because of
Low surface to volume ratio
High surface to volume ratio
Thin membrane
Thick membrane
Na+-K+ pump operates under intracellular concentration of
High Na and low K
High Na and High K
Low Na and low K
Low Na and high K
In an organism if number of linkage group is 12 then, number of haploid set of chromosome is
12
6
24
4
Th2 response is generated and maintained mainly by which of the following cytokines?
IL-4 and IL-10
IL-12 and INF-γ
INF-γ and TNR-α
IL-2 and IL-12
A.
IL-4 and IL-10
The Th2-type cytokines include interleukins 4, 5, and 13, which are associated with the promotion of IgE and eosinophilic responses in atopy, and also interleukin-10, which has more of an anti-inflammatory response. In excess, Th2 responses will counteract the Th1 mediated microbicidal action.
Using molecular clock, it was estimated that two species A and B must have diverged from their common ancestor about 9 X 106 years ago. If the rate of divergence per base pair is estimated to be 0.0015 per million years, what is the proportion of base pairs that differ between the two species now?
0,0270
0.0135
0.00017
0.0035