In HAT selection surviving cells synthesise nucleotides by means of:

TLS Online TPP Program

#Question id: 2822

#Unit 2. Cellular Organization

Transposition by a bacterial insertion element

a. occurs at a frequency of approximately 1 in 10^3 cells per generation.

b. can inactivate an essential gene.    

c. is mediated through a RNA intermediate.

d. requires the enzyme transposase

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#Question id: 31079

#Unit 4. Cell Communication and Cell Signaling

The second messenger, which opens calcium ion pores in endoplasmic reticulum and plasma membrane is:

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#Question id: 1737

#Unit 4. Cell Communication and Cell Signaling

The carrier T-cell epitope on a thymus-dependent antigen:

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#Question id: 3573

#Unit 8. Inheritance Biology

Homozygous yellow and round seed was crossed with green and wrinkle seed plant. All F1 offspring having yellow and round seed plant were allowed to self fertilization. What is the proportional of F2 plant heterozygous for both characters?

TLS Online TPP Program

#Question id: 10744

#Unit 10. Ecological Principles

Something that triggers a fixed action potential (FAP) is considered to be a(n) _____________.