Practice Questions

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#Question id: 3868

The sigma factor of E. coli RNA polymerase:

#SCPH01 Biochemistry

associates with the promoter before binding core enzyme.
combines with the core enzyme to confer specific binding to a promoter.
is inseparable from the core enzyme.
is required for termination of an RNA chain.

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TLS Online TPP Program

#Question id: 17655

#I Life Science/ Life Sciences Group – I-V

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

TLS Online TPP Program

#Question id: 17655

#SCPH05 I Biotechnology

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

TLS Online TPP Program

#Question id: 17655

#SCPH06 I Botany

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

TLS Online TPP Program

#Question id: 17659

#SCPH01 Biochemistry

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: 17659

#SCPH06 I Botany

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: 17660

#SCPH05 I Biotechnology

A pseudoplastic fluid is one in which the viscosity