Biology chapter 10

Before cell division of somatic cells, each chromosome must be replicated.  After replication, the resulting two parts of each chromosome are held together by cohesin at the centromere.  These two parts are referred to as:

• Kinetochores

• homologous chromosomes

• daughter chromosomes

• sister chromatids

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

• the centriole

• the centromere

• the cohesion complex

• the kinetochore

What is the sequence of events in a typical eukaryotic cell cycle?

• G1, S,G2, cytokinesis, mitosis

• G1, G2, mitosis, S, cytokinesis

• G1, G2, S, mitosis, cytokinesis

• G1, S, G2, mitosis, cytokines

This is the stage of mitosis characterized by the alignment of the chromosomes in a ring along the inner circumference of the cell:

• Metaphase

• Telophase

• Prophase

• interphase

If a cell contained a mutation in the gene that encodes FtsZ, which process would be affected?

• Septation

• Prophase

• cytokinesis

• DNA synthesis

A somatic cell from a corn plant normally contains 20 chromosomes.  How many sister chromatids would that cell contain during G2 of the cell cycle?

• 20

• 10

• 40

• 0

In bacterial cell division, the cell divides into two nearly equal halves.  This process is referred to as:

• fusion

• binary fusion

• mitosis

• meiosis

The two copies of each type of chromosome found in normal somatic (body) cells in an organism, throughout the cell cycle, are called:

• Sister chromatids

• homologous chromosomes

• Kinetochores

• daughter chromosomes

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

• chromatin

• the histone complex

• Cohesin

• the kinetochore

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

• solenoids

• nucleosomes

• rosettes

• chromatin loops