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11751200
Bio 110 Final: Chapter 12
Descripción
Test sobre Bio 110 Final: Chapter 12, creado por Christina Marshall el 13/12/2017.
Test por
Christina Marshall
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Resumen del Recurso
Pregunta 1
Pregunta
Which of the following best represents the central dogma of gene expression?
Respuesta
During transcription, DNA codes for polypeptides.
During transcription, DNA codes for mRNA, which codes for polypeptides during translation
During translation, DNA codes for mRNA, which codes for polypeptide during transcription
none of the above
Pregunta 2
Pregunta
A mutation prevents a gene from being transcribed into an mRNA. The mutation most likely disrupts
Respuesta
the promoter
the terminator
the start codon
the stop codon
both a and c
Pregunta 3
Pregunta
The functional product of a structural gene is
Respuesta
tRNA
mRNA
rRNA
a polypeptide
a, b, and c.
Pregunta 4
Pregunta
Which of the following is not a property of the genetic code?
Respuesta
It specifies the amino acids within a polypeptide
It is composed of codons, which are specific sequences of three bases.
It has a start codon, which specifies the starting point for polypeptide synthesis.
It has stop codons, which specify the end of polypeptide synthesis,
It determines the rate of transcription.
Pregunta 5
Pregunta
If a eukaryotic mRNA failed to have a cap attached to it 5' end, what would the negative consequence(s) be?
Respuesta
The mRNA would not properly exit the nucleus
The mRNA would not properly bind to a ribosome
The mRMA would not receive a Poly A tail.
The mRNA would not use the correct start codon.
Both a and b are correct
Pregunta 6
Pregunta
The small subunit of a ribosome is composed of
Respuesta
a protein
an rRNA molecule
many proteins
many rRNA molecules
many proteins and one rRNA molecule
Pregunta 7
Pregunta
The part of a tRNA that is complementary to a codon in an mRNA is the
Respuesta
acceptor stem
codon
peptidyl site
anticodon
adaptor loop
Pregunta 8
Pregunta
During the initiation of translation, the first codon, ________, enters the ___________ and associates with the initiator tRNA.
Respuesta
UAG, A site
AUG, A site
UAG, P site
AUG, P site
AUG, E site
Pregunta 9
Pregunta
The movement of the polypeptide from the tRNA in the P site to the tRNA in the A site is referred to as
Respuesta
peptide bonding
aminoacyl binding
translation
the peptidyl transfer reaction
elongation
Pregunta 10
Pregunta
During which stage of translation does the synthesis of a polypeptide occur?
Respuesta
initiation
elongation
termination
splicing
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