Mitosis/Meiosis-Week 8

Question 1

Fitting the very long DNA strands from a chromosome into the limited space of the nucleus is achieved by coiling the DNA around beads of histones with repeating subunits. These DNA-wrapped histones are called:

Chromatin

Nucleosomes
TADS
Territories

Answer 1

Nucleosomes

Question 2

In life cycles that alternate between haploid and diploid stages, fertilization doubles the number of chromosomes per cell while ________reduces it in half.

binary fission
mitosis
syngamy

meiosis

Answer 2

meiosis

Question 3

Which of the following events occurs first during meiosis?

Pairs of homologous chromosomes align along the equatorial plate.
Sister chromatids separate and are pulled to opposite poles of the cell.
Chromosomes decondense

Synapsis of homologous chromosomes.

Answer 3

Synapsis of homologous chromosomes.

Question 4

The portion of the cell cycle when the cell is growing and does not contain a replicated genome is referred to as:

Mitosis
G2
S

G1

Answer 4

G1

Question 5

The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:

The kinetochore

The centromere
The cohesin complex
The centrosome

Answer 5

The centromere

Question 6

If there are 32 sister chromatids in a normal somatic cell, what is the haploid number for that cell?

8
64
32
16

Answer 6

8

Question 7

Eukaryotic chromosome complexes are composed of 60% protein and 40% DNA. This complex is referred to as:

Cohesin
Condensin
Kinetochore
Chromatin

Answer 7

Chromatin

Question 8

What time point represents G2?

Graph of MPF activity and Cyclin concentration during the cell cycle.

2
4
3
1

Answer 8

3

Question 9

Which best explains a component of meiosis?

The cells that result from meiosis I are haploid, and each chromosome consists of 2 chromatids.
The cells that result from meiosis I are diploid, and each chromosome consists of 2 chromatids.
The cells that result from meiosis I are haploid, and each chromosome consists of 1 chromatid.
The cells that result from meiosis II are haploid, and each chromosome consists of 2 chromatids.

Answer 9

The cells that result from meiosis I are haploid, and each chromosome consists of 2 chromatids.

Question 10

The progress of the eukaryotic cell cycle is regulated primarily by what proteins?

Histone proteins
Condensins
FtsZ

Cyclins

Answer 10

Cyclins