BJU Chapter 10 Biology

Which of the following is NOT a reason cells divide?

• The cell gets too big to process and transport nutrients.
• New cells are needed for growth.
• DNA cannot be copied quickly enough in large cells.
• Surface area-to-volume ratio becomes too large.

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NGSS.HS-LS1-4

The region of a chromosomes where two sister chromatids are held together is called a..

• Spindle
• Centrosomere
• nucleosomes
• centriole

chromatids are..

• Dense patches within the nucleus.
• Bacterial chromosomes.
• Joined strands of duplicated genetic material.
• Prokaryotic nuclei.

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NGSS.HS-LS1-4

When a chromosome condenses,

• a histone wraps around chromatin
• beads form on the DNA double helix.
• its centromere splits.
• looped domains coil into a structure.

In order to fit within a cell, DNA becomes more compact by

• breaking apart into separate genes.
• extending to form very long, thin molecules.
• wrapping tightly around histones.
• being enzymatically changed into a protein.

The phase of the cell cycle that occupies most of an average cells life is

• G1
• G2
• S
• mitosis

What occurs after cytokinesis is completed?

• The cell organizes its microtubules.
• The cell begins to replicate its DNA.
• The cell enters G1.
• The cell enters G2.

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NGSS.HS-LS1-4

Which of the following shows the correct sequence of the cell cycle?

• Cytokinesis, Mitosis, G1, S, G2
• S, G1, G2, mitosis, cytokinesis
• G1, S, G2, mitosis, cytokinesis
• mitosis, G1, S, G2, cytokinesis

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NGSS.HS-LS1-4

The synthesis (S) phase is charcterized by

• DNA replication.
• cell division.
• cytoplasm.
• replication of mitochondria.

The first three phases of the cell cycle are collectively known as

• a gap
• telophase
• mitosis
• interphase