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13 Feb 2019

Fill in the blank. Elongation during translation does NOT involve ____________.

Question 16 options:

the translation of codons according to the genetic code

the formation of bonds catalyzed by the ribosome

complementary base pairing between RNA molecules

amino acids being linked together in a polypeptide

reading the DNA template 3' to 5'

For a given gene, what establishes the reading frame for translation?

Question 17 options:

the location of the enhancer relative to the gene

the first three nucleotides at the 5' end of the mRNA

the first three nucleotides at the 3' end of the mRNA

the start codon in the mRNA

the location of the promoter relative to the gene

Which of the following is the LEAST likely direct consequence of a substitution mutation?

Question 18 options:

changing the length of a protein coded for by a gene

changing one amino acid in a protein

creating a stop codon

eliminating a start codon

changing the length of the DNA molecule containing a gene

Suppose that the pre-mRNA transcript from a eukaryotic gene is 30,000 nucleotides long, and the gene codes for a sequence of 300 amino acids. What is the best explanation for the relationship between these numbers?

Question 19 options:

only the first 900 nucleotides of the pre-mRNA transcript are translated

it takes 100 nucleotides to specify a single amino acid

300 of the nucleotides in the transcript are important, and the rest are "junk"

only the last 900 nucleotides of the pre-mRNA transcript are translated

large portions of pre-mRNA transcripts are cut out during RNA processing

Suppose an individual is born into a population with a novel mutation. Is the new mutation an evolutionary change, and why?

Question 20 options:

no, because it is not a big enough change to count

yes, because new mutations are always adaptive

yes, because the appearance of a new genetic variant is a genetic change in a population

no, because not enough individuals have the mutation for it to matter

no, because most mutations are not adaptive

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Reid Wolff
Reid WolffLv2
13 Feb 2019
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