Questions from Quiz and Test from Chapter 12
The three-nucleotide codon system can be arranged into _____ combinations.
64
If an mRNA codon reads UCA, its complimentary anticodon will be
AUG.
Which of the following is not associated with translation? rRNA mRNA RNA polymerase DNA
DNA
True or False During transcription, both strands of DNA serve as a template for the synthesis of mRNA.
False
True or False Genes can be turned on by the binding of a repressor.
False
True or False The coding portions of most eukaryotic genes are embedded as introns with long sequences of non-coding exons.
False
True or False Each amino acid is specified by a codon.
True
True or False RNA polymerase binds to a strand of DNA and moves along the strand to make mRNA.
True
True or False Repressors block transcriptions by binding to the DNA
True
True or False The codon GCU specifies the amino acid alanine.
True
True or False The genetic code is universal.
True
Each amino acid in a protein is specified by
a codon.
The direct result of translation is
a protein
Where an mRNA leaves the cell's nucleus, it next becomes associated with
a ribosome.
The use of information in DNA to direct the production of particular proteins is called
gene expression.
After transcription, the mRNA molecule must _______ before it is translated into a protein molecule.
have its introns removed
The direct result of transcription is
mRNA
Which of the following unctions as the "blueprint" copies of nuclear genes? rRNA mRNA tRNA
mRNA
The genetic code is made up of
mRNA codons.
During translation, the mRNA molecule
moves between the two subunits of the ribosome.
Which of the following is not a type of RNA? nRNA (nuclear RNA) MRNA (messenger RNA) rRNA (ribosomal RNA) tRNA (transfer RNA)
nRNA (nuclear RNA)
DNA leaves the nucleus
never.
The site where RNA polymerase attaches to the DNA molecule to start the formation of an RNA molecule is called a(n)
promoter.
Which of the following is not associated with transcription? rRNA mRNA RNA polymerase DNA
rRNA
A(n) _____ is composed of 2 subunits, one nested into the other like a fist in the palm of your hand.
ribosome
Regarding the activity level of genes,
some genes are always off unless a repressor is not bound.
In the process of translation, the amino acids are arranged to form specific proteins because they are attached to
tRNA
_____ forms hairpin loops due to the hydrogen bonding that forms between its nucleotides with an amino acid attached to it's free -OH end.
tRNA
The process of obtaining a copy of the information in a gene as a strand of messenger RNA is called
transcription.
The process of taking the information on a strand of messenger RNA and building an amino acid chain that will become all or part of a protein molecule is called
translation.
