#Question id: 2987
#Unit 2. Cellular Organization
Following statements are regarding the goals of gap phases.
(i) to prepare for the next phase of the cell cycle.
(ii) to check that the previous phase of the cell cycle has been completed appropriately.
(iii) to inhibits CDKs activity.
(iv) to enhance servillance mechanisms.
Which of the following is correct?
#Question id: 2988
#Unit 2. Cellular Organization
Use the figure to answer the question below.
If the cell whose nuclear material is shown in the figure continues toward completion of mitosis, which of the following events would occur next?
#Question id: 2989
#Unit 2. Cellular Organization
Use the figure to answer the question below.
In the figure, G1 is represented by which numbered part(s) of the cycle?
#Question id: 2990
#Unit 2. Cellular Organization
Mitotic CDK complexes are maintained in an inactive state through inhibitory phosphorylation of the CDK subunit. Two highly conserved tyrosine and threonine residues in mammalian CDKs are subject to regulated phosphorylation.
|
Gene |
Mutant phenotypes |
|
A. Wee1 |
i. the cell does not divide but continues to grow |
|
B. CAK kinase |
ii. mitotic cyclins are inactivated |
|
C. cdc25 phosphatase |
iii. premature entry into mitosis |
The following table enlists genes and phenotypes observed on mutation of these genes but not correctly matched. Which one of the following combinations is correctly matched ?
#Question id: 2991
#Unit 2. Cellular Organization
Early observations of a cultured cell line indicated that the cells did not exhibit either density-dependent inhibition or anchorage dependence. What do these observations suggest about this cell line?
#Question id: 2992
#Unit 2. Cellular Organization
DNA was isolated from three different cell types of the same organism, the relative DNA content for each type was determined, and the results were plotted on the graph shown in the figure below. Refer to the graph to answer the following questions. Which sample of DNA might be from a cell that stopped the process of cell division in G0 phase of the cell cycle prior to meiosis?