17 Questions
What is the direction in which the RNA chain grows during transcription?
5' to 3' direction
Which of the following modifications occurs to all eukaryotic mRNA?
addition of a poly(A) tail to the 3' end of the molecule
Can transcription and translation occur together in eukaryotic cells?
False
What is the direction in which RNA polymerase travels along the template strand during transcription?
3' to 5' direction
What is the first step in gene transcription?
RNA polymerase is recruited to the promoter by general transcription factors
What is the component labeled as A in the RNA molecule?
Phosphate group
What is the percentage of adenine in the DNA of a particular animal species if it is 15% thymine?
35%
During eukaryotic translation, how is the initiation codon found?
The first AUG codon is found when the 40S subunit scans the mRNA from the 5´ end
What is the primary factor in determining how quickly an mRNA is degraded?
Length of poly(A) tail
What is the consequence of alternative splicing?
Production of more than one viable protein product
What is a prerequisite for reading the genetic code?
DNA strands are degraded
What is the sequence of the template DNA strand if the RNA strand has the sequence GAGC?
CTCG
What is the result of a mutation in the coding region of a gene?
An impact on the resulting polypeptide product
What is true about the coding sequences of most eukaryotic genes?
They are interspersed with regions that are not expressed
What is the purpose of the poly(A) tail on eukaryotic mRNA?
Binds to the poly(A) binding protein to prevent exonuclease activity
What is the relationship between transcription and translation?
Transcription and translation are connected processes
What is a characteristic of the association between amino acids and codons?
One amino acid is associated with multiple codons
Test your knowledge on gene expression, mutations, and the genetic code. This quiz covers transcription, translation, and the effects of mutations on protein products. Evaluate your understanding of molecular biology concepts.
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