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One difference between RNA polymerases and DNA polymerases is that RNA polymerases
doesn’t require a primer
The portions of the mRNA transcript which remain in mRNA after post-transcriptional modifications are called
exons
The lac operon in addition to responding to the presence or absence of lactose is also sensitive to glucose levels. In the presence of glucose
cAMP will be low and the CAP protein will not be activating high levels of expression
What is the function of ubiquitin in protein degradation?
Tags proteins for destruction
How many subunits do ribosomes consist of?
2
Protein translation in the ribosome begins with N or C terminus?
N
High concentration of cAMP leads to
active CAP (CAP binds to DNA appropriate site)
When is the regulatory gene transcribed in Lac operon?
It is always transcribed
What is the process called when breaking the peptide bonds between amino acid in proteins?
Proteolytic cleavage
How many arms are in tRNA?
4
What is the complementary strand of the DNA molecule 5' AAGGGTT 3' ?
3' TTCCCAA
Carrier for an amino acid is
tRNA
Which post-translational modification is catalyzed by protein disulfide isomerase (PDI)?
Formation of disulfide bonds
How does temperature regulate translation in certain bacteria?
By blocking Shine-Dalgarno sequences
What does tmRNA do in bacteria?
Fixes stuck ribosomes and destroys bad proteins
What is RNA strand resulting on the DNA molecule of 5' AAACGGTT
3' UUUGCCAA
5' _________ is added to mature mRNA
Cap
Iron is tightly bound to_____
Ferritin
A Shine-Dalgarno sequence is a _____
a short nucleotide sequence found in bacterial and archaeal messenger RNA (mRNA) that acts as a ribosomal binding site
What does it mean that the genetic code is degenerate?
One amino acid can have multiple codons
What is RNAP?
DNA dependent RNA
polymerase
3' _________ is added to mature mRNA
PolyAAAAAAAAAAA
True or False: Ribosomes are in the rough Endoplasmic reticulum
True
Ribosomal frameshifting can lead to the production of multiple proteins from a single _
mRNA
T or F: The size of vtRNA is much larger than cellular Ribosomes.
True