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Concepts of Biology

Review Questions

Concepts of BiologyReview Questions
2.

A diploid cell has ________ the number of chromosomes as a haploid cell.

  1. one-fourth
  2. one-half
  3. twice
  4. four times
3.

An organism’s traits are determined by the specific combination of inherited ________.

  1. cells
  2. genes
  3. proteins
  4. chromatids
4.

Chromosomes are duplicated during what portion of the cell cycle?

  1. G1 phase
  2. S phase
  3. prophase
  4. prometaphase
5.

Separation of the sister chromatids is a characteristic of which stage of mitosis?

  1. prometaphase
  2. metaphase
  3. anaphase
  4. telophase
6.

The individual chromosomes become visible with a light microscope during which stage of mitosis?

  1. prophase
  2. prometaphase
  3. metaphase
  4. anaphase
7.

What is necessary for a cell to pass the G2 checkpoint?

  1. cell has reached a sufficient size
  2. an adequate stockpile of nucleotides
  3. accurate and complete DNA replication
  4. proper attachment of mitotic spindle fibers to kinetochores
8.

________ are changes to the nucleotides in a segment of DNA that codes for a protein.

  1. Proto-oncogenes
  2. Tumor suppressor genes
  3. Gene mutations
  4. Negative regulators
9.

A gene that codes for a positive cell cycle regulator is called a(n) ________.

  1. kinase inhibitor
  2. tumor suppressor gene
  3. proto-oncogene
  4. oncogene
10.

Which eukaryotic cell-cycle event is missing in binary fission?

  1. cell growth
  2. DNA duplication
  3. mitosis
  4. cytokinesis
11.

FtsZ proteins direct the formation of a ________ that will eventually form the new cell walls of the daughter cells.

  1. contractile ring
  2. cell plate
  3. cytoskeleton
  4. septum
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