Worksheets11/15 BIOL 111 SI Dr. Tag
Total questions: 15
Worksheet time: 9mins
If a cell does not receive a go signal at the G1 checkpoint, what stage does the cell go into?
G2
G0
G1
M
When is MPF activity and cyclin concentration the highest?
S
G1
Mitosis
G2
What is MPF made of?
Cdk
ATP
DNA
Cyclin
MPF promotes mitosis by (a) proteins
What phase is the concentration of cyclin B the highest?
G1
S
G2
M
What phase is cyclin A the highest? Phase (a)
True or false: Cyclin D has the highest concentration at the beginning and at the end of interphase
True
False
At the M checkpoint, without full chromosome attachment, (a) signal is recieved
True or false: In a dish, cells will continue growing until they form stacks of layers from top to bottom of the dish
True
False
Do cancer cells exhibit anchorage dependence or density-dependent inhibition?
Yes
No
A research team began a study of a cultured cell line. Their preliminary observations showed them that the cell line did not exhibit either density-dependent inhibition or anchorage dependence. What could they conclude right away?
They have altered the series of cell cycle phases.
The cells are unable to form spindle microtubules.
They were originally derived from an elderly organism.
The cells show characteristics of tumors.
The cells are in G0
Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine. This arrangement _____.
allows variable width of the double helix
determines the tertiary structure of a DNA molecule
determines the type of protein produced
permits complementary base pairing
What is the function of the release factor (RF)?
It releases the amino acid from its tRNA to allow the amino acid to form a peptide bond.
It releases the ribosome from the ER to allow polypeptides into the cytosol.
It separates tRNA in the A site from the growing polypeptide.
It binds to the stop codon in the A site in place of a tRNA.
It supplies a source of energy for termination of translation.
What stage of mitosis is this?
Anaphase
Metaphase
Telophase
Prometaphase
What phase is this cell in mitosis?
Metaphase
Interphase
Prometaphase
Prophase
