Exposure to polycyclic aromatic compounds which may be used in the production co

Question

Exposure to polycyclic aromatic compounds which may be used in the production coloring used in food products, hair products, clothing and related items can induce a number of mutations. Of these the one that results from intercalation with the DNA helix is a mutation which results in addition or deletion of a nucleotide is called transition - leading to early chain termination in translation transition = neutral mutation SOS repair - addition or deletion of nucleotide neutral substitution frame-shift - change in transcriptional changes reversion -non-function proteins In contrast to mRNA found in Streptococcus pneumonia, mRNA found in bone marrow cells contain operator and promoter regions always begins with the codon for the amino acid methionine contains a methylated cap and a polyadenylated tail region contains polycistronic genes all of the above Not all base pair substitutions alter the activity of the products enzyme's activity. Those that do must alter the enzyme's primary structure secondary structure tertiary structure disulfide bridges all of the above The requirement for a free 3' hydroxy group by DNA polymerase means that replication replication proceeds in the 3'to 5' direction replication proceeds in the 5' to 3' direction exonuclease activity proceeds 3' to 5' endonuclease activity proceeds 5' to 3' exonuclease and endonuclease proceeds 5' to 3' Exposure to the carcinogens and mutagens associated with everyday living is minimized by editing by endonuclease and exonulease activities of DNA polymerase RNA polymerase gyrase RNA primase none of the above = identify

Explanation / Answer

10.Frame shift mutation

11. C. Contains a methylated cap and a polyadenylated tail.

Only monocistronic genes are present in eukaryotic mRNA.Shine delgarno sequence is absent in eukarotes.

12.Option E.all of the above

Enzymatic activity depends on the active site of the enzyme. The active site sequence is determined by the amino acid interactions,. If any amino acid is altered, the active site may be disturbed and the enzyme looses its activity.

13.Option B. Replication proceeds in the 5l to 3l direction.

14.A.DNA polymerase

When synthesizing new DNA, DNA polymerase can add free nucleotides only to the 3' end of the newly forming strand. This results in elongation of the newly forming strand in a 5'-3' direction.

14.

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