Copy of Unit 3 Retest 2025 (5/2/2026)

Nødvendig

1

A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.
In which location of the student's diagram would exposure to radiation would cause cancer cells to develop due to mutations AND explain why.

Nødvendig

1

Elliot is observing some cells under the microscope and made the following observations:
No visible nucleus
Spindle fibers are present
Chromosomes are separated to opposite poles
What phase of the cell cycle is he MOST LIKELY observing?

Anaphase

Interphase

Metaphase

Prophase

Nødvendig

2

Observe the graph below and complete the sentence.

null

In the graph above, Stage 2 represents .

Nødvendig

1

The p53 gene in mammalian cells is known to stop the cell cycle in response to damaged DNA. If this gene is damaged without repair, which of the following is most likely to occur?

Growth factors will allow the cell to divide normally.

Damaged DNA will remain unrepaired and a tumor may form.

The cell cycle will be disrupted in the defective cell.

The cell will immediately undergo apoptosis.

BIO.6.C

Nødvendig

1

Cells pass through multiple checkpoints before entering mitosis. If DNA damage is detected, the cells do not enter mitosis until the damage is repaired.
Why does the damaged DNA need to be repaired before the cell enters mitosis?

For healthy daughter cells to be produced, allowing the organism to continue growing.

For the cytoplasm to divide equally between the two daughter cells.

For chromosomes to properly align at the metaphase plate during mitosis.

For synthesis to create multiple copies of DNA as emergency storage of information.

BIO.6.A

2

A model of a DNA molecule is shown below.

null

The arrow in the picture above is pointing at .

B.C.6A

Nødvendig

1

Which of these correctly identifies the structures in the diagram above?

1: Hydrogen Bond

2: Nucleotide

3: Nitrogen Base

4: Sugar-Phosphate Backbone

1: Nucleotide

2: Nitrogen Base

3: Deoxyribose Sugar

4: Hydrogen Bond

1: Sugar-Phosphate Backbone

2: Hydrogen Bond

3: Phosphate

4: Nucleotide

1: Nitrogen Base Pair

2: Sugar-Phosphate Backbone

3: Nucleotide

4: Deoxyribose Sugar

Nødvendig

1

Individuals who are lactose intolerant have low lactase enzyme activity which leads to trouble digesting many dairy/milk products.
Certain individuals have a mutation in the MCM6 gene, which allows them to produce more active lactase enzymes that aide in digestion of dairy products.
What factor is responsible for determining if someone can produce the enzyme needed to digest lactose?

The total number of chromosomes in the individual

The number of cells located in the stomach of the individual

The sequence of nucleotides in the gene

The order of phosphate molecules and hydrogen bonds

Nødvendig

2

The diagram below represents the steps of DNA replication.

Place the description of each step below to describe the process shown.

Andre svarmuligheder:

Complementary pairs complete identical strands

Original template DNA sequence

DNA structure unzips (unwinds / opens)

Nødvendig

1

A DNA sequence is shown.
5' G A T C G C T A 3'
Which strand represents the Complementary DNA sequence?

3' C T A G C G A T 5'

5' T A C G G A T C 3'

5' A T C G C T A G 3'

3' T A G C G A T C 5'

BIO.7.A

Copy of Unit 3 Retest 2025 (5/2/2026)

A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.In which location of the student's diagram would exposure to radiation would cause cancer cells to develop due to mutations AND explain why.

Elliot is observing some cells under the microscope and made the following observations:No visible nucleusSpindle fibers are presentChromosomes are separated to opposite poles What phase of the cell cycle is he MOST LIKELY observing?

The p53 gene in mammalian cells is known to stop the cell cycle in response to damaged DNA. If this gene is damaged without repair, which of the following is most likely to occur?

Cells pass through multiple checkpoints before entering mitosis. If DNA damage is detected, the cells do not enter mitosis until the damage is repaired. Why does the damaged DNA need to be repaired before the cell enters mitosis?

Which of these correctly identifies the structures in the diagram above?

A DNA sequence is shown. 5' G A T C G C T A 3'Which strand represents the Complementary DNA sequence?

A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.In which location of the student's diagram would exposure to radiation would cause cancer cells to develop due to mutations AND explain why.

Elliot is observing some cells under the microscope and made the following observations:No visible nucleusSpindle fibers are presentChromosomes are separated to opposite poles What phase of the cell cycle is he MOST LIKELY observing?

The p53 gene in mammalian cells is known to stop the cell cycle in response to damaged DNA. If this gene is damaged without repair, which of the following is most likely to occur?

Cells pass through multiple checkpoints before entering mitosis. If DNA damage is detected, the cells do not enter mitosis until the damage is repaired. Why does the damaged DNA need to be repaired before the cell enters mitosis?

Which of these correctly identifies the structures in the diagram above?

A DNA sequence is shown. 5' G A T C G C T A 3'Which strand represents the Complementary DNA sequence?

A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.
In which location of the student's diagram would exposure to radiation would cause cancer cells to develop due to mutations AND explain why.

Elliot is observing some cells under the microscope and made the following observations:
No visible nucleus
Spindle fibers are present
Chromosomes are separated to opposite poles
What phase of the cell cycle is he MOST LIKELY observing?

Cells pass through multiple checkpoints before entering mitosis. If DNA damage is detected, the cells do not enter mitosis until the damage is repaired.
Why does the damaged DNA need to be repaired before the cell enters mitosis?

A DNA sequence is shown.
5' G A T C G C T A 3'
Which strand represents the Complementary DNA sequence?

A student produced a model to demonstrate the cell cycle and its importance in the development of cancer cells.
In which location of the student's diagram would exposure to radiation would cause cancer cells to develop due to mutations AND explain why.

Elliot is observing some cells under the microscope and made the following observations:
No visible nucleus
Spindle fibers are present
Chromosomes are separated to opposite poles
What phase of the cell cycle is he MOST LIKELY observing?

Cells pass through multiple checkpoints before entering mitosis. If DNA damage is detected, the cells do not enter mitosis until the damage is repaired.
Why does the damaged DNA need to be repaired before the cell enters mitosis?

A DNA sequence is shown.
5' G A T C G C T A 3'
Which strand represents the Complementary DNA sequence?