LS1.6 BIO1 Review

For the most part, the process of cell division in plant and animal cells is the same, but there are a few differences. The table shown lists some events that take place during the prophase stage in animal cell mitosis.

How is prophase different in plant cells?

• The nucleolus does not disappear.

• Condensed chromosomes have only one chromatid.

• The spindle fibers organize without centrioles.

• Centromeres do not form between chromatids.

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BIO1.LS1.6

A teacher showed slides of the different stages of mitosis to four students and asked them to describe the stage viewed under the microscope.

The only student to correctly describe an illustrated stage was Student ​ (a)  

• 4
• 1
• 2
• 3

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NGSS.HS-LS1-4

Which best explains why DNA replication in the human body is significant?

• it is needed for cell division

• it is necessary for protein synthesis

• it replaces any damaged DNA cells

• it produces RNA strands

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NGSS.HS-LS1-4

All of the following events occur during prophase in mitosis except

• pairing of chromosomes

• spindle formation

• crossing over

• condensation of DNA

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NGSS.HS-LS1-4

Use the provied diagram to answer the question that follows.

Which phase of mitosis is represented in the diagram?

• prophase

• metaphase

• anaphase

• telophase

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NGSS.HS-LS1-4

Which diagram shows a plant cell forming a cell plate during cytokinesis?

• 
• 
• 
• 

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NGSS.HS-LS1-4

The cell cycle is divided into several phases.

In this figure, M indicates mitosis, when the nucleus is dividing. G₁, S, and G₂ are parts of interphase. Points X, Y, and Z represent checkpoints during these phases.

What happens during cell cycle checkpoints?

• Chemical signals tell eukaryotic DNA when to arrange into circular shape or X shape.

• Chemical signals tell prokaryotic DNA when to associate with histone proteins.

• Chemical signals tell the cell to proceed with division or to stop.

• Chemical signals tell the cell when to create or destroy ribosomes.

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NGSS.HS-LS1-4

The diagram shows the relative length of each phase of the cell cycle in sequence beginning with the letter W.

Which phase of this diagram corresponds to mitosis?

• W

• X

• Y

• Z

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NGSS.HS-LS1-4

Which process must take place before mitosis can occur properly?

• • active transport

• aerobic respiration

• DNA replication

• protein synthesis

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NGSS.HS-LS1-4

Data shown is collected from the analysis of an onion root tip.

Which hypothesis is supported by the data?

• Telophase will be the shortest phase of the cell cycle because the two new cells will form quickly.

• Anaphase will be the shortest phase of the cell cycle because it does not take long for the chromosomes to split.

• Prophase will be the longest phase of the cell cycle because the nuclear membrane must break down.

• Metaphase will be the longest phase of the cell cycle because the chromosomes must align in the middle of the cell

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NGSS.HS-LS1-4