DNA Sequencing, Mutation and Repair Which of the following mutations arise without exposure to external agents? None of these Analogous mutations Spontaneous mutations Induced mutations None of these Analogous mutations Spontaneous mutations Induced mutations ANSWER DOWNLOAD EXAMIANS APP
DNA Sequencing, Mutation and Repair Due to which of the following DNA repair mechanisms, one is able to distinguish newly synthesized DNA strands from older one? New strands are methylated while old strands are not New strands do not contain cytosine bases Old strands are methylated while new strands are not New strands are lower in molecular size New strands are methylated while old strands are not New strands do not contain cytosine bases Old strands are methylated while new strands are not New strands are lower in molecular size ANSWER DOWNLOAD EXAMIANS APP
DNA Sequencing, Mutation and Repair A mutagen is defined as a molecule which stabilizes DNA thus prevents mutations from occurring an inhibitor of gene modification an enzyme that repairs mutations a chemical or physical agent that induces mutations a molecule which stabilizes DNA thus prevents mutations from occurring an inhibitor of gene modification an enzyme that repairs mutations a chemical or physical agent that induces mutations ANSWER DOWNLOAD EXAMIANS APP
DNA Sequencing, Mutation and Repair Which of the following mutation affects only a single nucleotide? Aerial mutation Point mutation Regional mutation Site mutation Aerial mutation Point mutation Regional mutation Site mutation ANSWER DOWNLOAD EXAMIANS APP
DNA Sequencing, Mutation and Repair A nonsense mutation may result into an abnormal elongation of a polypeptide modification of mRNA a premature termination of the synthesis of a polypeptide a large deletion within the reading frame of a gene an abnormal elongation of a polypeptide modification of mRNA a premature termination of the synthesis of a polypeptide a large deletion within the reading frame of a gene ANSWER DOWNLOAD EXAMIANS APP
DNA Sequencing, Mutation and Repair Which of these mechanisms for thymine dimers repair lead to mutations? SOS repair Never leads to mutation Excision repair Photoreactivation SOS repair Never leads to mutation Excision repair Photoreactivation ANSWER DOWNLOAD EXAMIANS APP
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