A rapidly growing bacterial species such as E. coli exhibits a typical phase of growth cycle in liquid nutrient broth. If a bacterial culture has starting density 1000 cells/ml in log phase and after four hours cell density is 4000 cells/ml.  What is specific growth rate per hour? 

#Question id: 4145

#Unit 3. Fundamental Processes

Steriod hormone response elements (HREs) are _ , which, when bound to _, alter gene expression at the level of _.

#Question id: 11753

#Unit 7. System Physiology – Animal

Which of the following is an important functional parameter of pain receptors?

#Question id: 4916

#Unit 8. Inheritance Biology

Kappa particles indicate

#Question id: 15986

#Unit 12. Applied Biology

#Question id: 3398

#Unit 11. Evolution and Behavior

Genetic drift in a small population for multiple generations can significantly affect the composition of a population’s gene pool. Following some observation are given for reason of Genetic drift?

A) Small populations are threatened by a loss of genetic variability. This loss may be caused by inbreeding, genetic drift, and limited mating.

B) Sampling error can arise is through the founder effect, which is due to the limited matting within population

C) Genetic drift arises is through a genetic bottleneck, which develops when a population undergoes a drastic reduction in population size.

D) Variance in allele frequency due to genetic drift will be maximal when one allele is very rare and the population size is small.

Which of the above observation are true?