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  3. 1.a single nucleotide mutation in the third positi

1.A single nucleotide mutation in the third position of a codon more often than in the...

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Biology

1.A single nucleotide mutation in the third position of a codonmore often than in the second or first position

a) has no effect on the amino acid sequence of the encodedprotein.

b) alters the reading frame of the mRNA.

c) changes an amino acid in the encoded protein.

d) introduces a stop codon into the mRNA.

2. The synthesis of new DNA requires the prior formation of RNAoligonucleotides to serve as primers. This latter observation isevidence in support of the hypothesized existence of

a) that Crick’s postulate of the flow of information isincorrect.

b) the endosymbiotic origin of mitochondria andchloroplasts.

c) an ancient RNA world

d) the abiotic synthesis of organic peptides

3.A frameshift mutation could not result from

a) a single nucleotide insertion

b) a dual nucleotide insertion

c) a single nucleotide substitution

d) a single nucleotide deletion

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