Lab Work Sheet: The Cell Cycle

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LAB

Virtual Lab Worksheet: The Cell Cycle

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Question 1 0.5 Points

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Identify where cytosine would be located in this diagram of a DNA molecule.

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Question 2 0.5 Points

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Identify the base pair in this diagram of a DNA molecule. (Despite there being numerous base pairs in this diagram, select only the one in the same position as the diagram in the background and procedures file.)

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Question 3 0.5 Points

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Identify the where guanine would be located in this diagram of a DNA molecule.

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Question 4 0.5 Points

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Identify where adenine would be placed in this diagram of a DNA molecule.

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Read and complete the laboratory Background and Procedure on the Cell Cycle Use your answers to complete this virtual lab worksheet. You will have one attempt at this worksheet. Do not Submit it for grading until youj have completed all of the questions. You will not be allowed to make any changes once you have sumbitted this worksheet.

Question 5 2 Points

Write the complement pairing for the following sequence of DNA nucleotides.

C A T G T C A G

Enter Enter Enter Enter Enter Enter Enter Enter

Question 6 2 Points

Thinking only about the events of the cell cycle discussed in this lab, what is the most likely cause of gene mutations? When during the cell cycle would these mutations occur?

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Question 7 1 Point

During S-phase of interphase, the newly copied DNA strands are attached to one another at the

. These copies are now called  which together make up

a duplicated chromosome.

centromere sister chromatids

Question 8 1 Point

Sister chromatid of duplicated chromosomes will be ___________ duiring mitosis.

separated

Question 9 2 Points

Match the phases indicated in the picture with the appropriate name.

Prompts Answers

1 (a)

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5

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(b)

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(c)

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(d)

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(e)

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Question 10 2 Points

Cells resulting from mitotic division are often described as being clones. What does this mean?

They are genetically identical to the original cell.

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Question 11 1 Point

Select up to 4 options

Duplicated chromosomes (choose all that apply)

Selectedconsist of two (sister) chromatid.

Selectedhave an area called the centromere where sister chromatid are attached to one another.

consist of two homologous chromosomes.

Selectedoccur in a cell after DNA replication.

Question 12 1 Point

A cell's DNA is organized into units called

Selectedchromosomes

enzymes

nucleoli

centrioles

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Question 13 3 Points

Exercise 3: Results of the Cell Cycle.

Upload an image of the sketches you made of the two daughter cells resulting from mitotic division and the associated questions from Exercise 3 (page 8) in the background and procedures.

Click on the image icon in the edit menu to upload the file from your device. Be sure to use a Blackboard compatible file type such as jpg or png.

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Question 14 1 Point

Folic acid (one of the B vitamins) is necessary for the normal incorporation of thymine (a major component of DNA) into DNA. Why are neural tube and brain defects often seen in the babies of women who do not get enough folic acid in their diets during pregnancy? (Hint: Think about the events of the cell cycle and the rapid growth and development occurring in embryonic development.)

During pregnancy the baby requires a lot of cells to grow a brain and a spine. Folic acid helps make thymine, and this helps the baby to copy their DNA so that the brain and spine can grow in a normal manner.

Question 15 2 Points

The following diagram shows animal cells in different phases of the cell cycle and mitosis. Label each cell with the appropriate phase. (Hint: A nucleus with dashed lines indicate that the individual chromosomes are not visible.) Match the numbered cell with its phase of the cell cycle (phases may be used more than once)

Prompts Answers

1 1

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2

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2

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3

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4

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5

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6

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7

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8

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