In order for male differentiation to occur during embryonic development, testosterone must be secreted from the testes. What stimulates the secretion of testosterone during embryonic development?

TLS Online TPP Program

#Question id: 17655

#Unit 13. Methods in Biology

In DNA isolation, for protein free solution what will be the ratio at  nm

TLS Online TPP Program

#Question id: 17659

#Unit 13. Methods in Biology

During your study of the gene for an enzyme you have isolated an amber mutation in the middle of the gene which produces a truncated form of the enzyme. By placing a +1 frameshift mutation a short distance before the amber mutation and a –1 frameshift mutation a short distance after the amber mutation you create a triple mutant that restores expression of a functional, full-length enzyme. 

a) +1 frameshift puts the amber mutation out of frame so that it is no longer read as a stop.

b) -1 frameshift is inserted after the amber so that no longer read as a stop.

c)  -1 frameshift is inserted after the amber to restore the frame of the end of the protein.

d) +1 frameshift puts the amber mutation out of frame so that it restore the frame of the end of the protein.

Which of the following is the correct prediction about the frame shift mutation?

TLS Online TPP Program

#Question id: 17819

#Unit 13. Methods in Biology

During RNA extraction, the homogenate is first treated with

TLS Online TPP Program

#Question id: 17820

#Unit 13. Methods in Biology

During the RNA extraction guanidinium thiocyanate functions as a strong inhibitor of

TLS Online TPP Program

#Question id: 17997

#Unit 13. Methods in Biology

In RNA isolation, for protein free solution what will be the ratio at  nm

TLS Online TPP Program

#Question id: 17998

#Unit 13. Methods in Biology

Eukaryotic mRNA species are isolated by using