Biology 13 Quiz Wanda

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For a gene to be transcribed, the RNA polymerase has to bind to a _____ sequence of nucleotides on the DNA. promotor
If an mRNA codon reads UAC, its complementary anticodon will be: AUG
In humans, what percent of the genome is devoted to the exons that encode proteins? about 1.5%
The primary RNA transcript is: mRNA before the introns have been removed
A group of DNA nucleotides that contains the information to produce a single protein is a: gene
The bases of RNA are the
same as those of DNA with the exception that RNA contains:
uracil instead of thymine
The process of bringing in
the appropriate amino acid into position along the mRNA in the cytoplasm is:
translation
Which site on the ribosome
does the new tRNA bring an amino acid to?
A
The RNA copy of DNA that
leaves the nucleus and travels to the cytoplasm to make proteins is:
mRNA
The site where RNA
polymerase attaches to the DNA molecule to start the formation of mRNA is
called a(n):
promoter
The molecule that carries
each amino acid to its correct position along mRNA in the cytoplasm is:
tRNA
Which of the following
cannot be a product of transcription?
Protein
To turn genes off, a
regulatory protein called a __________ is bound to a regulatory site so that
RNA polymerase is blocked.
repressor
The three nucleotide
sequence on mRNA is called an anticodon.
FALSE
A(n) ____________ is a
piece of DNA with a group of genes that are transcribed together as a unit.
operon
When mRNA leaves the cell's
nucleus, it next becomes associated with:
a ribosome
The genetic code is
universal, the same in practically all organisms.
TRUE
Small interfering RNAs can
alter gene expression by targeting mRNA for destruction or by blocking
translation of a mRNA.
TRUE
Which of the following is
correct about the genetic code?
All living things use the
same genetic code.
What is RNA interference? When small RNAs form
double-stranded RNA molecules that can regulate gene expression.
The mRNA has a
three-nucleotide sequence called a _________, while the molecule transporting
the amino acid has a complementary sequence called a(n) _______________.
codon, anticodon
All of the following occur
in both prokaryotes and eukaryotes except:
there is alternative
splicing of genes
Due to _________, the
25,000 genes of the human genome seem to encode as many as 120,000 different
expressed mRNAs
alternative splicing
In eukaryotes,
transcription takes place in the _________ and translation takes place in the
________.
nucleus, cytoplasm
The use of DNA information
to direct the production of particular proteins is called:
gene expression