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24 Dec 2019

Premature termination of translation occurs due to which type of mutation.

 

 

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Lelia Lubowitz
Lelia LubowitzLv2
24 Dec 2019
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Related questions

1.What type of bond holds amino acids together in a polypeptide chain?

A. Peptide Bond B. Phosphodiester Bond C. Hydrogen Bond

2.Termination of translation takes place when the ribosome reaches:

A. A primer B. The promoter C. The start codon D. A stop codon

3. Which of the following is Different between prokaryotic and eukaryotic translation?

A. tRNA brings amino acids to the ribosome B. Codon is complementary to anticodon C. Coding dictionary D. Occurs in same place as transcription

1. Gennie is wild type. Below is a segment of her DNA. The topstrand is the coding region, and the reading frame begins with thefirst codon that codes for met (start codon).

5' GCATGTTCTTGT 3'

3' CGTACAAGAACA 5'


Kevin is mutant. Below is a segment of his DNA. The top strandis the coding region, and the reading frame begins with the firstcodon that codes for met (start codon).

5' GCATGTTTTTGT 3'

3' CGTACAATAACA 5'


What type of mutation does Kevin have?

A) silent

B) misssense

C) nonsense

D) frameshift


2) A type of dwarfism results from the production of mutantSHR-1 protein. You look at the length of the mutant SHR-1 and thenormal (wild-type) SHR-1 protein, and discover that the mutantSHR-1 protein has fewer amino acids.


What do you expect to find when you examine the DNAsequence?

A) nucleotides were deleted

B) additional nucleotides were added

C) one nucleotide was changed

D) without additional information, any of the above arepossible.


3) Below are two DNA coding strand sequences. The 5' ATG encodesthe in-frame strat codon.

Tom's DNA sequence is:

5' ATG CGC TTA CCC TTA CTC CTA TAA 3'


Harry's DNA sequence is:

5' ATG CGC TAA CCC TTA CTC CTA TAA 3'


Harry's mutation causes the premature termination of:

A) Replication

B) Transcription

C) Translation

D) Answer B and C

E) All of the above


A-The region of the tRNA that is complementary to the triplet onthe mRNA is
1. The acceptor stem
2. The codon
3. The peptidyl site
4. The anticodon
5. The adaptor loop

B-During translation, the ribosome must move along the mRNA.This movement
1. requires the ribosome to come apart intosubunits
2. requires an accessory factor andenergy
3. does not require energy, but requiresthe ribosome to change conformation
4. requires accessory factors and usesenergy from peptide bond formation

C-A nonsense mutation
1. results in large scale change to achromosome
2. will lead to the premature terminationof transcription.
3. will lead to the premature terminationof translation
4. is the same as atransversion

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