Changes in which of the following characterizes mutations? Both (a) and (b) Phenotype None of these Genotype TRUE ANSWER : ? YOUR ANSWER : ?
The promoter on an expression vector used to overproduce proteins in bacteria is a bacterial promoter not a regulated promoter expressed both in bacteria and mammalian cells the natural promoter of the gene being cloned TRUE ANSWER : ? YOUR ANSWER : ?
Genetic variations are influenced by the environment temporary not heritable stable TRUE ANSWER : ? YOUR ANSWER : ?
The DNA sequences of rRNA genes can be used to predict whether a bacteria will be gram-positive or gram-negative predict the pulsed field gel pattern of a microorganism obtain a tentative identification of a new microorganism assess relatedness of eukaryotes but not prokaryotes TRUE ANSWER : ? YOUR ANSWER : ?
When mutations involve vital functions so that the mutants are nonviable, it is a lethal mutation none of these transversion nonsense mutation TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following mutation affects only a single nucleotide? Regional mutation Aerial mutation Point mutation Site mutation TRUE ANSWER : ? YOUR ANSWER : ?
A nonsense mutation may result into modification of mRNA a large deletion within the reading frame of a gene an abnormal elongation of a polypeptide a premature termination of the synthesis of a polypeptide TRUE ANSWER : ? YOUR ANSWER : ?
What was the first eukaryotic chromosome to be sequenced? None of these Yeast chromosome XI Arabidopsis chromosome IV Yeast chromosome III TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following mutations arise without exposure to external agents? Analogous mutations Spontaneous mutations None of these Induced mutations TRUE ANSWER : ? YOUR ANSWER : ?
A mutagen is defined as a molecule which stabilizes DNA thus prevents mutations from occurring an enzyme that repairs mutations a chemical or physical agent that induces mutations an inhibitor of gene modification TRUE ANSWER : ? YOUR ANSWER : ?