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Epigenetics - The Study of heritable changes in gene expression | Quiz test

Epigenetics - The Study of heritable changes in gene expression | Quiz test

Epigenetics is the study of heritable changes in gene expression (active versus inactive genes) that do not involve changes to the underlying DNA sequence — a change in phenotype without a change in genotype — which in turn affects how cells read the genes.

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Quiz Questions And Answers

Which of the following enzyme seals nicks in the phosphodiester backbone during?

DNA replication
DNA polymerase I
Ligase
Primase

What factors may interfere with the establishment of the stationary phase

Nutrient limitation
Limited oxygen availability
Toxic waste accumulation
All of the above

___ is NOT an environmental facto that limits microbial growth

Temperature
pH
Pressure
CO2

What is the best definition for anitcodon

The base triplet on a tRNA that is complementary to the triplet codon on mRNA
The base triplet on a mRNA that is complementary to the triplet codon on tRNA
A small sequence of RNA that initiates the replication process

Which of the following enzyme seals nicks in the phosphodiester backbone during

DNA replication
DNA polymerase
Ligase
Primase

Chaperone proteins have a critical role in

The folding and stabilization of other proteins
Directing newly synthesized proteins to other locations in the cell
The process of transcription
A & B

When applied to control microorganisms, filtration is considered a ___

Chemical agent
Mechanical method
Biological agent
Physical agent
Both B & D

A bacterial cell that is able to take up free DNA and incorporate it into its genome during transformation is called

Transformer
Recombinant
Competent
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