Chapter 12 Cell Cycle And Mitosis Flashcards
In eukaryotic cells chromosomes are composed of
C) DNA and proteins
What is the final result of mitosis in a human
Genetically identical 2n somatic cells
If there are 20 duplicated choromosnes in a cell how many centromeres are there
20
The first gap in the cell cycle (G1) corresponds to
A) normal growth and cell function
The microtubule-organising center found in animal cells is an identifiable structure present during all phases of the cycle specifically it is known as the
Centrosome
The mitotic spindle is a microtubular structure that is involved in ________.
D) separation of sister chromatids
Metaphase is characterised by ________.
A) aligning of chromosomes on the equator
Kinetochore microtubules assist in the process of splitting centromeres by ________.
B) creating tension by pulling toward opposite poles
How is plant cell cytokinesis different from animal cell cytokinesis?
B) Plant cells deposit vesicles containing cell-wall building blocks on the metaphase plate; animal cells form a cleavage furrow.
FtsZ is a bacterial cytoskeletal protein that forms a contractile ring involved in bacterial cytokinesis. Its function is analogous to ________.
A) the cleavage furrow of eukaryotic animal cells
t which phase are centrioles beginning to move apart in animal cells?
D) prophase
Which of the following are primarily responsible for cytokinesis in plant cells but not in animal cells?
B) Golgi-derived vesicles
The beginning of anaphase is indicated by which of the following?
C) Cohesin is cleaved enzymatically.
During which phase of mitosis do the chromatids become chromosomes?
B) anaphase
A cleavage furrow is ________.
C) a groove in the plasma membrane between daughter nuclei