Biology

Biology, 20.10.2019 10:00, jass624

Can a mutation in a dna sequence be corrected by dna enzymes?

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Biology, 01.10.2019 20:00, jaelynnm

1.a mutation that causes changes in the amino acid sequence downstream of the mutation is called a)a point mutation. b)a translocation mutation. c)a substitution mutation. d)a frameshift mutation. 2.what will be the outcome of deletion of the third base, a, from the dna sequence below? assume that the first base corresponds to the start of a codon. -c-c-a-a-a-t-a-a-a-g- (open attachment) a)the first amino acid in this sequence does not change. b)a frameshift mutation occurs. c)gly-leu-phe is changed to gly-tyr-phe. d)all of the above are correct. 3.what type of mutation is albinism? a)advantageous b)lethal c)neutral d)deleterious 4.an original dna sequence and a mutated form of this sequence are shown below. what type of mutation occurred? original: -g-c-t-t-a-g-t-c-c-a-g-t-a- mutation: - g-t-a-g-c-t-t-a-g-t-c-c-a- a)translocation b)insertion c)deletion d)inversion

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Biology, 07.11.2019 01:31, shelliecurby

1. a mutation that causes changes in the amino acid sequence downstream of the mutation is called a) a point mutation. b) a translocation mutation. c) a substitution mutation. d) a frameshift mutation. 3. what type of mutation is albinism? a) advantageous b) lethal c) neutral d) deleterious 4.an original dna sequence and a mutated form of this sequence are shown below. what type of mutation occurred? original: -g-c-t-t-a-g-t-c-c-a-g-t-a- mutation: - g-t-a-g-c-t-t-a-g-t-c-c-a- a)translocation b)insertion c)deletion d)inversion

Answers: 1

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Biology, 08.11.2019 02:31, wade98

The mmm operon, which has sequences a, b, c, and d, encodes enzymes 1 and 2. mutations in sequences a, b, c, and d have the following effects, where a plus sign (+) means that the enzymes are synthesized, a minus sign (−) means that the enzymes are not synthesized, and a pound (#) means that the enzymes are synthesized but are not functional. mmm absent mmm present enzyme 1 enzyme 2 enzyme 1 enzyme 2 wild-type + + − − mutation in a # + − − mutation in b + + + + mutation in c + # − mutation in d − − − − (a) is the mmm operon inducible or repressible? explain your answer. (b) indicate which sequence (a, b, c, or d) is part of the following components of the operon and explain your answer. regulator gene: promoter: structural gene for enzyme 1: structural gene for enzyme 2:

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