Lab Practical 1 (labs 7,8,9,10)

Question 1

Which of the following is not part of interphase?

a) cytokinesis
b) first gap phase
c) second gap phase
d) synthesis phase

Answer 1

a) cytokinesis

Question 2

A cell in the stage of G-zero:

a) divides continuously
b) ceases cell division
c) exhibits cytokinesis
d) exists in a gap phase

Answer 2

b) ceases cell division

Question 3

Which is the correct sequence of the M (mitotic) phase?

a) telophase, prophase, metaphase, anaphase
b) prophase, anaphase, metaphase, telophase
c) prophase, telophase, metaphase, anaphase
d) prophase, metaphase, anaphase, telophase

Answer 3

d) prophase, metaphase, anaphase, telophase

Question 4

Which of the following occurs in prophase?

a) spindle disappears
b) nuclear envelopes reassemble
c) chromosomes condense
d) sister chromatids separate

Answer 4

c) chromosomes condense

Question 5

Which of the following events occurs during telophase?

a) sister chromatids
b) chromosomes align
c) cytokinesis
d) spindle apparatus forms

Answer 5

a) sister chromatids

Question 6

Sister chromatids operate to opposite poles during:

a) telophase
b) anaphase
c) prophase
d) metaphase

Answer 6

b) anaphase

Question 7

List the major events in each phase:

1. G1, S, and G2
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase
6. Cytokinesis

Answer 7

1. Cells grow and duplicate
2. Nuclear membrane breakdowns and chromosomes form
3. Chromosomes are lined up in the middle of cell
4. Chromosomes are pulled apart and sister chromatids are pulled to opposite poles
5. Nuclear membrane and nucleous reappear and spindle fibers disappear
6. Division of cells cytoplasm and cells divide into two

Question 8

Distinguish between mitosis and cytokinesis.

Answer 8

Mitosis: involves the division of nuclear contents
Cytokinesis: involves the division of the cytoplasm