Chapter 12 Flashcards
1
Q
If there are 20 chromatids in a cell, how many centromeres are there
A
10
2
Q
If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis
A
20
3
Q
If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it have during anaphase
A
4
4
Q
Chromosomes first become visible during which phase of mitosis
A
Prophase
5
Q
In which group of eukaryotic organisms does the nuclear envelope remain intact during mitosis? A. Seedless plants B. Dinoflagellates C. Diatoms D. B & C E. A, B, & C
A
D
6
Q
Which is a general term for enzymes that active or inactivate other proteins by phosphorylating them
A
Protein kinase
7
Q
What is the shortest stage of the cell cycle
A
M phase
8
Q
Density-dependent inhibition is explained by what?
A
As cells become more numerous, the cell surface proteins of one cell contact the adjoining cells and they stop dividing
