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Epigenetics – the study of heritable changes in gene expression Quiz

Epigenetics – the study of heritable changes in gene expression Quiz Test

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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

When incubated in aclosed culture vesel, the growth of the population will exhibit phases. the correct order of these phases is

Log, lag, stationary and death
Lag, log, stationary and death
Exponential, stationary, lag and death

The SOS DNA repair happens when

There is an extensive damage on the DNA molecule
No other repair mechanism can be used
Other neighboring cells participate on the repair of a specific cell
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