Frame shift mutation may occur as a result of None of these formation of a thymine-dimer deamination of cytosine to uracil conversion of guanine to xanthine TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following(s) is/are steps in excision repair mechanisms? Excision All of these Incision Ligation TRUE ANSWER : ? YOUR ANSWER : ?
Differentiation of four different bases in automated sequencing systems is that each base has cytosine at start different radioactive tag distinctive fluorescent tag unique antibody bound to it TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following mutations arise without exposure to external agents? Induced mutations Analogous mutations Spontaneous mutations None of these TRUE ANSWER : ? YOUR ANSWER : ?
The DNA sequences of rRNA genes can be used to predict the pulsed field gel pattern of a microorganism predict whether a bacteria will be gram-positive or gram-negative assess relatedness of eukaryotes but not prokaryotes obtain a tentative identification of a new microorganism TRUE ANSWER : ? YOUR ANSWER : ?
Due to which of the following DNA repair mechanisms, one is able to distinguish newly synthesized DNA strands from older one? New strands are lower in molecular size New strands do not contain cytosine bases New strands are methylated while old strands are not Old strands are methylated while new strands are not TRUE ANSWER : ? YOUR ANSWER : ?
A nonsense mutation introduced into the DNA sequence of a gene may have no effect on the transcript or protein made shorten the length of the protein encoded by the gene cause a shift in reading frame cause premature termination of the mRNA TRUE ANSWER : ? YOUR ANSWER : ?
Changes in which of the following characterizes mutations? None of these Genotype Phenotype Both (a) and (b) TRUE ANSWER : ? YOUR ANSWER : ?
Genetic variations are stable not heritable temporary influenced by the environment TRUE ANSWER : ? YOUR ANSWER : ?
The promoter on an expression vector used to overproduce proteins in bacteria is the natural promoter of the gene being cloned expressed both in bacteria and mammalian cells not a regulated promoter a bacterial promoter TRUE ANSWER : ? YOUR ANSWER : ?