11751200
Descripción
Test por Christina Marshall, actualizado hace más de 1 año
|
Creado por Christina Marshall
hace más de 6 años
|
|
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
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.