Cell Division

Which statement is correct?

• Base pairs are paired incorrectly.

• Base pairs are correct.

• This is incorrect because bases are missing.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

By studying this photograph, scientists gained knowledge about the

• role of DNA in protein synthesis

• mutation of nucleotide sequences in DNA

• Sequence of DNA that makes up the human genome

• double-helix structure of DNA

This model of the cell cycle includes 2 arrows that each represent a process in the cycle. What do the two arrows represent?

• Arrow 1 is prophase

  Arrow 2 is interphase

• Arrow 1 is mitosis, Arrow 2 is meiosis

• Arrow 1 is Interphase, Arrow 2 is mitosis

• Arrow 1 is meiosis, Arrow 2 is prophase

Tags

NGSS.HS-LS1-4

During which phase of the cell cycle is DNA replicated?

• Mitosis

• G1 phase

• G2 Phase

• S Phase

This part of the cell cycle is best described as the process that

• Duplicates the DNA

• Completes cell division

• Maintains genetic homeostasis

• Synthesizes new molecules

Tags

NGSS.HS-LS1-4

When cells leave the cell cycle, they exit during G1 and then enter G0 phase, a resting period. Most normal cells can leave G0 phase and reenter the cell cycle at G1 before entering the S phase. Cancer cells are different because they cannot enter G0. They are likely to

• fail to complete S phase.

• mutate during G1 phase.

• repeat the cell cycle continuously.

• die after completing mitosis.

Tags

NGSS.HS-LS1-4

How does the presence of an oncogene lead to the formation of a tumor?

• ATP production is inhibited.

• Cell division is unregulated.

• Somatic cell growth is inhibited.

• Antibody activity is unregulated.

DNA damage can turn off genes involved in cell-signaling pathways. Turning off these genes can cause less-mature cells to divide too rapidly, often leading to the development of

• tumors.

• allergies.

• hemophilia.

• cardiovascular disease.

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NGSS.HS-LS3-2

If DNA damage is detected, the cells do not enter mitosis until the damage is repaired. Why is DNA damage repaired before cells enter mitosis?

• So that another round of DNA synthesis does not have to take place.

• So that the chromosomes can align at the metaphase plate during mitosis.

• So that the cell can go into the G0 phase.

• So that healthy daughter cells are produced, allowing the organism to continue growing.

Tags

NGSS.HS-LS1-4

Which cell is in the phase of mitosis that shows the spindle fibers pulling the chromosomes apart?

• Cell 1

• Cell 2

• Cell 3

• Cell 4

Tags

NGSS.HS-LS1-4