#Question id: 2981
#SCPH06 I Botany
For the nuclear envelope to be broken down as cells go from prophase to prometaphase during mitosis, the nuclear lamina has to be disassembled. Which of the following statement is incorrect?
#Question id: 2982
#I Life Science/ Life Sciences Group – I-V
Match the following proteins (Column I) with their functions (Column II) during cell cycle.
|
Column I |
Column II |
|
A. Cdc25C phosphatase |
i. Activates vertebrate S phase CDKs |
|
B. INK4 |
ii. Activation of Mitotic CDKs |
|
C. Cdc25A phosphatase |
iii. Binds and inhibits G1 CDKs |
|
D. APC/CCdc20 |
iv. Degradation of securin |
#Question id: 2982
#SCPH06 I Botany
Match the following proteins (Column I) with their functions (Column II) during cell cycle.
|
Column I |
Column II |
|
A. Cdc25C phosphatase |
i. Activates vertebrate S phase CDKs |
|
B. INK4 |
ii. Activation of Mitotic CDKs |
|
C. Cdc25A phosphatase |
iii. Binds and inhibits G1 CDKs |
|
D. APC/CCdc20 |
iv. Degradation of securin |
#Question id: 2983
#I Life Science/ Life Sciences Group – I-V
Cell cycle is regulated by master regulators (cyclin and CDKs). In vertebrates, G1 CDK activity rises during G1 and is stimulated by the presence of growth factors. When signaling from growth factors is sustained, the resulting cyclin D–CDK4/6 complexes begin phosphorylating Rb, releasing some E2F, which stimulates transcription of the genes encoding cyclin E, CDK2, and E2F itself. In a particular cell type there is a mutation in Rb such that it cannot be phosphorylated. What will be the correct expression pattern of cyclin E in these cells after mitotic stimulation?
#Question id: 2983
#SCPH06 I Botany
Cell cycle is regulated by master regulators (cyclin and CDKs). In vertebrates, G1 CDK activity rises during G1 and is stimulated by the presence of growth factors. When signaling from growth factors is sustained, the resulting cyclin D–CDK4/6 complexes begin phosphorylating Rb, releasing some E2F, which stimulates transcription of the genes encoding cyclin E, CDK2, and E2F itself. In a particular cell type there is a mutation in Rb such that it cannot be phosphorylated. What will be the correct expression pattern of cyclin E in these cells after mitotic stimulation?
#Question id: 2984
#I Life Science/ Life Sciences Group – I-V
Certain unicellular eukaryotes, including diatoms and some yeasts, have mechanisms of nuclear division that may resemble intermediate steps in the evolution of mitosis. Which of the following is a characteristic feature of nuclear division in these organisms?