Question

biology unit review: cell cycle, mitosis, cancer, and asexual reproduction

1. which process allows starfish to regrow limbs?

a. budding b. binary fission c. regeneration d. vegetative propagation
section 3: fill in the blank (26 - 35)

1. the process of cell division in somatic cells is called
2. cells that make up tissues and organs are called cells.
3. the process of produces gametes.
4. the enzyme adds new nucleotides during replication.
5. the enzyme unwinds the dna strands.
6. the phase where the cell prepares for division by growing and making organelles is
7. two identical copies of a chromosome are called
8. the area where chromatids attach is the
9. the phase when the chromosomes line up at the equator is
10. in plant cells, a forms during cytokinesis.

section 4: true or false (36 - 45)
write t for true and f for false on the line.

1. somatic cells divide through meiosis.
2. mitosis creates genetically identical cells.
3. cytokinesis happens before telophase.
4. growth factors are examples of internal signals.
5. carcinogens can cause mutations in dna.
6. a benign tumor can invade surrounding tissue.

Explanation:

• 26: Mitosis is the process of cell division in somatic cells.
• 27: Somatic cells make up tissues and organs.
• 28: Meiosis produces gametes.
• 29: DNA polymerase adds new nucleotides during replication.
• 30: Helicase unwinds the DNA strands.
• 31: Interphase is when the cell prepares for division by growing and making organelles.
• 32: Two identical copies of a chromosome are called sister chromatids.
• 33: The centromere is the area where chromatids attach.
• 34: Metaphase is when the chromosomes line up at the equator.
• 35: In plant cells, a cell plate forms during cytokinesis.
• 36: Somatic cells divide through mitosis, not meiosis. So it's False.
• 37: Mitosis creates genetically identical cells. So it's True.
• 38: Cytokinesis happens after telophase. So it's False.
• 39: Growth factors are examples of external signals. So it's False.
• 40: Carcinogens can cause mutations in DNA. So it's True.
• 41: A benign tumor does not invade surrounding tissue. So it's False.

Answer:

1. Mitosis
2. somatic
3. meiosis
4. DNA polymerase
5. helicase
6. interphase
7. sister chromatids
8. centromere
9. metaphase
10. cell plate
11. F
12. T
13. F
14. F
15. T
16. F