Cell Cycle Questions and Answers

Multiple Choice Questions and Answers on Cell Cycle

Question 1 : The G0 phase is

  1. a permanent state of all body cells
  2. the state of most cells in an animal body
  3. another name for interphase
  4. all of the above

Answer : 2

Question 2 : How many chromatids are there in a duplicated chromosome?

  1. One
  2. Two
  3. Three
  4. Four

Answer : 2

Question 3 : The term homologous chromosomes

  1. refers to replications of the same chromosome
  2. is another name for sister chromatids
  3. must be haploid
  4. means a pair of chromosomes of the same kind, such as sex chromosomes

Answer : 4

Question 4 : At the center of the cell cycle control system is Cdk, a protein that

  1. is phosphorylated to become active
  2. binds to different cyclins
  3. is only active during mitosis
  4. manufactures growth factors

Answer : 2

Question 5 : Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.

  1. C
  2. G
  3. M
  4. S

Answer : 4

Question 6 : Which of the following is the primary growth phase of a cell?

  1. G1
  2. G2
  3. M
  4. G0

Answer : 1

Question 7 : Cells which no longer divide (such as certain specialized cells found in the human brain) remain in which phase of the cell cycle?

  1. Prophase
  2. S phase
  3. G0 Phase
  4. Gl Phase

Answer : 3

Question 8 : The cell cycle is controlled in most cells by

  1. time (after a certain length of time the cell divides)
  2. a series of checkpoints
  3. cell size (when the cell reaches a certain size, it divides)
  4. different cells exhibit different control strategies

Answer : 4

Question 9 : How many chromatids does a diploid body cell contain just prior to cell division?

  1. 23
  2. 46
  3. 69
  4. 92

Answer : 4

Question 10 : DNA replication is controlled at which of the following checkpoint?

  1. G1
  2. G2
  3. M
  4. S

Answer : 1

Question 11 : Which of the following begins when pairs of sister chromatids align in the center of the cell?

  1. Anaphase
  2. Interphase
  3. Metaphase
  4. Prophase

Answer : 3

Question 12 : Which of the following is the normal cell cycle, primarily regulated at checkpoints?

  1. Metaphase in mitosis
  2. Anaphase, G1 boundary
  3. G1-S boundary
  4. S-G2 boundary

Answer : 3

Question 13 : The phase of mitosis which is associated with the formation of the nuclear envelope, is

  1. prophase
  2. metaphase
  3. anaphase
  4. telophase

Answer : 4

Question 14 : At the __________ checkpoint, cell growth is controlled.

  1. C
  2. G1
  3. G2
  4. S

Answer : 2

Question 15 : A nuclear envelope forms around each set of sister chromatids in

  1. prophase
  2. metaphase
  3. anaphase
  4. telophase

Answer : 4

Question 16 : In which of the following phase preparations for genome separation are made?

  1. C
  2. G1
  3. G2
  4. M

Answer : 4

Question 17 : Cdks bind with __________ , enabling the Cdks to function as enzymes.

  1. MPF
  2. cyclins
  3. histones
  4. p53

Answer : 2

Question 18 : Which of the following is not a part of a human chromosome in any phase?

  1. Centriole
  2. Histone
  3. Nucleosome
  4. Centromere

Answer : 1

Question 19 : During which phase, a cleavage furrow is formed in animal cells?

  1. C
  2. G1
  3. G2
  4. M

Answer : 1

Question 20 : In which phase, each chromosome replicates to produce two sister chromatids?

  1. interphase
  2. metaphase
  3. anaphase
  4. telophase

Answer : 1

Question 21 : Microtubules grow from the poles to kinetochores of each chromatid during

  1. prophase
  2. metaphase
  3. anaphase
  4. telophase

Answer : 1

Question 22 : Which of the following triggers the division of activated T lymphocytes?

  1. FGF
  2. Interlukin 2
  3. PDGF
  4. Erythroprotein

Answer : 2

Question 23 : The term, not related to mitosis is

  1. gametes
  2. chromosomes
  3. DNA replication
  4. somatic cells

Answer : 1

Question 24 : What structure forms as a network of protein cables during cell division?

  1. Spindle
  2. Aster
  3. Kinetochore
  4. Chromatid

Answer : 1

Question 25 : A centromere is

  1. another name for kinetochore
  2. the structure to which microtubules attach
  3. a constriction on a chromosome bound to a disk
  4. all of the above

Answer : 4

Question 26 : Which of the following statements about mitosis is incorrect?

  1. The daughter nuclei are genetically identical to the parent nucleus
  2. Chromosomes separate during anaphase due to the interaction of polar microtubules from opposite poles pushing against each other
  3. Chromosomes separate during anaphase when the kinetochore microtubules shorten as they depolymerize
  4. Chromosomes move to the metaphase plate using motor proteins, a kind of kinesin, attached to spindle fibers

Answer : 2

Question 27 : In the cell cycle replication of the genome occurs in the

  1. G1 phase
  2. G2 phase
  3. M phase
  4. S phase

Answer : 4

Question 28 : At which of the following check point, mitosis is controlled?

  1. G1 phase
  2. G2 phase
  3. M phase
  4. S phase

Answer : 2

Question 29 : The centromeres move toward the poles in __________ .

  1. anaphase
  2. interphase
  3. metaphase
  4. prophase

Answer : 1

Question 30 : Which phase of mitosis is associated with separation of chromatids?

  1. anaphase
  2. interphase
  3. metaphase
  4. prophase

Answer : 1

Question 31 : Sequences that correctly describes the cell cycle is

  1. -> G1-> G2 -> S -> mitosis -> cytokinesis ->
  2. -> S -> G2 -> mitosis -> cytokinesis -> G1 ->
  3. ->cytokinesis-> mitosis -> G1 -> S -> G2 ->
  4. -> G1 ->S -> G2 -> cytokinesis -> mitosis ->

Answer : 2

Question 32 : Which of the following from a blood clot stimulates the growth of cells in the healing process?

  1. EGF
  2. PDGF
  3. MPF
  4. NGF

Answer : 2

Question 33 : The spindle forms in the

  1. G1 phase
  2. G2 phase
  3. M phase
  4. S phase

Answer : 3

Question 34 : Which phase of mitosis is associated with chromosomes aligned at the center of the cell and centromeres divide?

  1. anaphase
  2. interphase
  3. metaphase
  4. prophase

Answer : 3

Question 35 : The event(s) which does not occur during interphase, is/are

  1. Chromatin condenses
  2. Protein Synthesis
  3. Organelles replication
  4. DNA replication

Answer : 1

Question 36 : In prokaryotes, just before the cell divides, the two daughter genomes are attached side by side to the

  1. cell membrane
  2. replication origin
  3. centromeres
  4. equatorial plate

Answer : 1