|
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 |
| |
