GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A different polypeptide is produced.
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The polarity of lRNA becomes the opposite of that of DNA.
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Nucleic acids are methylated.
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The gene is now read in the 3’ to 5’ direction.
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Detailed explanation-1: -The correct option is A A new polypeptide i…
Detailed explanation-2: -Frameshift mutations The outcome of a frameshift mutation is complete alteration of the amino acid sequence of a protein. This alteration occurs during translation because ribosomes read the mRNA strand in terms of codons, or groups of three nucleotides. These groups are called the reading frame.
Detailed explanation-3: -Which of the following statements correctly describes the effect a nonsense mutation would have on a gene? It introduces a premature stop codon into the mRNA.
Detailed explanation-4: -The type of DNA mutation that results in a change in the reading frame of an mRNA is an addition or deletion, also called a frameshift mutation. During a frameshift mutation, one nucleotide is added or deleted. This causes a change in the reading frame of mRNA.
Detailed explanation-5: -Silent mutation: Some mutations that change DNA bases do not have any effect on the sequence of amino acids in the protein. These mutations are called silent mutations and they do not affect the structure or function of the protein because there is no effect on the amino acid sequence.