6 APRIL 2021 CURRENT AFFAIRS QUIZ

always contains an origin of replication

is a circular DNA molecule

usually contains one or more restriction sites

All of these

Protein-coding genes are always associated with a restriction pattern

Restriction sites allow DNAs to be digested

None of these

Known protein coding sequences are too far apart to allow linkage determination for most new genes

treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dC, treat with DNA polymerase and bind oligo-dT

digest with RNase, add G residues to the 3' end, treat with reverse transcriptase, add G residues to the 3' end and treat with DNA polymerase

bind oligo-dC, treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dT and treat with DNA polymerase

bind oligo-dT, treat with reverse transcriptase, digest with RNase, add G residues to the 3' end, bind oligo-dC, treat with DNA polymerase

HindIII

EcoRV

SaII

XhoI

Mutation is increased

Alleles may become fixed

There is an increased incidence of recessive diseases

They tend to loose genetic diversity

long ... short

negative ... positive

positive to negative

basic ... acidic

the viral DNA that they attack

the bacterium they are derived from

None of these

the person who discovered

Type I

Type II

Type IV

Type III

Hinf I

EcoRI

Hind II

Eco K

have identical DNA sequences

be cut by the same restriction enzyme

originate from the same type of cell

be of the same length