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WorksheetsTrancscription, Translation, Mutation
Total questions: 11
Worksheet time: 52mins
What is the purpose of this process?
To translate the genetic code into a specific sequence of amino acids
To transcribe the DNA onto a strand of mRNA
To replicate the DNA and create an identical copy
To synthesize amino acids using the unzipped DNA
An illustration of how a particular DNA mutation will most likely affect the polypeptide produced is shown. The type of mutation illustrated is a (a) because a nucleotide base is being (b) .
Different types of mutations can occur in DNA. The diagram represents a type of mutation. Which statement describes the mutation in the diagram?
A translocation occured in the chromosome
A substitution occurs with the adenine base.
A deletion of a cytosine base occurs.
A base is inserted into one strand of the DNA.
A point mutation occurs in a gene, but the resulting protein remains unchanged. Which explanation BEST describes why the mutation did not affect the protein’s function?
The mutation occurred in a part of the DNA that does not code for proteins.
The mutation caused a frameshift, but enzymes corrected the change.
The mutation added an extra amino acid that improved the protein’s performance.
The new codon codes for the same amino acid due to the redundancy of the genetic code
The model shows a mutation to a partial sequence of bases in a gene. Which type of mutation does the model demonstrate?
Deletion
Insertion
Substitution
Translocation
Why are insertion and deletion (frameshift) mutations so harmful?
They change all of the codons from the mutation on down the line, which changes the amino acid sequence
They insert things that an organism doesn't need.
They often delete things that organisms need.
Insertion and deletions are not any more harmful than substitution mutations.
A partial DNA segment and an mRNA codon chart are shown.
3′ T C A T G C A T G 5′
What amino acid sequence is encoded in the partial DNA segment?
Remember to transcribe the DNA into mRNA then use the chart!!!
Serine – Threonine – Tyrosine
Serine – Serine – Tyrosine
Serine – Threonine – Methionine
Serine – Alanine – Methionine
A model of transcription and a codon chart are shown. Which amino acid would be coded first in the DNA being transcribed.
Cys
Phe
Ile
Met
AUG-CCA-GUA-GGG-UAA
