9th class Biology
Chapter 5
Cell Cycle
Exercise solved Mcqs
1. 1. In which stage
of the cell cycle each chromosomes is duplicated and so it consist of two
chromatid?
a)
G1
b)
S
c)
M
d)
G2
2. 2. If you observe a
cell like this one,
What phase of mitosis is it?
a)
Anaphase
b)
Telophase
c)
Metaphase
d)
Prophase
3. During
which phase of mitosis spindles are formed?
a)
G2
b)
Interphase
c)
Prophase
d)
Metaphase
4. In which stage
of life cycle, the cell is preparing enzymes for chromosomes duplication?
a)
G1
b)
G2
c)
S
d)
M
5. Which of the
following stage of cell division is very different for animal and plant cells?
a)
Metaphase
b)
Anaphase
c)
Telophase
d)
Cytokinesis
6. Prior to cell
division, each chromosomes replicates or duplicates its genetic material. The
products are connected by a centromere and are called;
a)
Sister chromosomes
b)
Homologous chromosomes
c)
Non-sister chromatid
d)
Sister chromatids
7. The process of
mitosis ensure that;
a)
Each new cell is genetically different from its parent
b)
Each new cell receives the proper number of
chromosomes
c)
Cells will divide at the appropriate time
d)
Chromosomes duplicate without errors
8. Cytokinesis in a
plant cell is characterized by
a)
The equal division of homologous chromosomes
b)
A pinching off the cell membrane to divide the cell
c)
The formation of the cell plate in the the
cytoplasm
d)
The movement of chromosomes from the metaphase plate
9. Which of the
following is unique to mitosis and not a part of meiosis I?
a)
Homologous chromosomes pairing forming bivalents
b)
Homologous chromosomes cross over
c)
Chromosomes pairs are broken during anaphase
d)
Chromatids separates during anaphase
10. Which event
distinguishes meiosis from mitosis?
a)
Condensation of chromosomes
b)
Loss of the nuclear membrane
c)
Formation of metaphase plate
d)
Pairing of Homologous chromosomes
11. In which stage
of the cell cycle most cell spend their lives?
a)
Prophase
b)
Metaphase
c)
Interphase
d)
Telophase
12. Which of the
following distinguishes meiosis from mitosis?
a)
The chromosome number is reduced
b)
Chromosomes under crossing over
c)
The daughter cells are genetically different from the
parent cell
d)
All of the above
13. For mitosis, the
chromosomes of the cell duplicate during interphase. When do the chromosomes duplicate
for meiosis?
a)
Before meiosis I
b)
Before meiosis II
c)
During meiosis I
d)
Do not duplicate
14. Find the correct
statement.
a)
Homologous chromosomes forms pairs during mitosis
b)
Chromosomes do
not duplicate in the interphase preceding meiosis I
c)
Homologous chromosomes forms pairs during
meiosis but not mitosis
d)
Spindles are not required during meiosis
15. What reason
would you suggest for the fact that the total DNA content of each daughter cell
is reduced during meiosis?
a)
Chromosomes do not duplicate during the interphase
before meiosis I
b)
Chromosomes do not duplicate between meiosis I and II
c)
Half of the chromosomes from each gamete are
broken
d)
Sister chromatids separates during anaphase of meiosis
I
