Exam 4
Liberty University
Principles of Cellular Biology
MSCI 660
BIOM 615
Queson 1
2.5 out of 2.5 points
The following schemac diagram shows the acvaon of M-Cdk in mitosis. Indicate which proteins below
correspond to those indicated as A to D in the diagram. Your answer would be a four-leer string composed of
leers A to D only, e.g. BACD.
( ) Wee1
( ) CAK
( ) Cdc25
( ) M-cyclin
Selected Answer:
CBDA
Queson 2
2.5 out of 2.5 points
Indicate true (T) and false (F) statements below regarding mitosis and the changes that it brings about
compared to interphase. Your answer would be a four-leer string composed of leers T and F only, e.g. TFTF.
( ) Microtubules become greatly stabilized in mitosis compared to interphase.
( ) The number of γ-tubulin ring complexes in the centrosomes increases greatly during mitosis compared to
interphase.
( ) Chromosomes stabilize mitoc microtubules through acvaon of Ranmonomeric G protein.
( ) A bipolar spindle can be formed even in the absence of centrosomes.
Selected Answer:
FTTT
Queson 3
2.5 out of 2.5 points
Which of the following cell populaons in our body has the highest mitoc index?
Selected Answer:
Fibroblasts
Queson 4
2.5 out of 2.5 points
Which of the following events occurs in mitoc metaphase?
Selected Answer:
Chromosome alignment the spindle equator at
Queson 5
0 out of 2.5 points
How is hyaluronic acid dierent from other glycosaminoglycans of the extracellular matrix?
Selected Answer:
It can several megadaltons be in mass.
Queson 6
2.5 out of 2.5 points
In the following schemac drawing of a vertebrate prometaphase chromosome as seen under a microscope,
indicate whether the chromosome is more likely to be closer to pole A or pole B. Write down A or B as your
answer.
Selected Answer:
A
Queson 7
2.5 out of 2.5 points
Collagens are extremely rich in …
Selected Answer:
glycine and proline.
