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CHAPTER NO
CHAPTER
NO.21
CELL
CYCLE
COMPLETION ITEMS.
Fill in the blanks.
The period of divison
during cell cycle is called _______ phase.
In yeast cells,
cell cycle is completed in _______ minutes.
During cell division,
_______ sets of microtubules originate from each pair of centrioles.
The spread of tumor
cells and establishment of secondary areas of growth is called _______.
Pairing of chromosomes
starts in _______ stage of prophase-I.
In Down's syndrome,
chromosome no. _______ fails to segregarte.
Individuals with
Down's syndrome have _______ chromosomes.
A person with klinefelter's
syndrome has an extra _______ chromosome.
The persons affected
with Turner's syndrome have _______ chromosomes.
Internal programme
of events and sequence of morphological changes by which cell commits
suicide is called _______.
The cell death due
to tissue damage is called _______.
Division of the
nucleus is called _______.
The microtubules
of centrioles are made of a protein _______.
The most critical
phase of mitosis which ensures equal distribution of chromatids in the
daughter cells is called _______.
In human, S-phase
takes about _______ hours.
Mongolism is also
known as _______.
_______ phase precedes
G2 phase.
The specialized
microtuble structure including aster and spindle is called _______.
_______ is formed
from vesicles which originate from golgi complex.
_______ is the
special area of centromere where spindle fibers attach.
TRUE/FALSE
ITEMS.
Encircle
the correct answer. (T / F)
Interphase is the
period of great biochemical activity. (T / F)
Meiosis occurs in
haploid cells. (T / F)
During S-phase,
DNA is synthesized and chromosome number is doubled. (T
/ F)
Division of the
cytoplasm is called cytokinesis. (T / F)
Equatorial plate
is formed during telophase. (T /
F)
Pharagmoplast is
formed in plants. (T / F)
In mitosis the hereditary
material is equally distributed in the daughter cells. (T
/ F)
The interphase of
meiosis lacks, G1 stage. (T / F)
Go stands
for no gap. (T / F)
Crossing over takes
place during metaphase. (T / F)
During diplotene,
the paired chromosomes repel each other and begin to separate.
(T / F)
The chances of
teenage mother having down's syndrome child is one in many thousands.
(T / F)
Persons with klinefelter's
syndrome produce small testes with no sperms at ejaculation. (T
/ F)
Autosomal non-disjunction
may occur in other than 21st chromosome. (T /
F)
Genetic information
remains unchanged during mitosis. (T / F)
In human cells,
G1 takes about 13 hours. (T / F)
Each kinetochore
gets four fibers each from opposite poles. (T / F)
Individuals with
Turner's syndrome often survive with male appearance. (T
/ F)
During crossing
over, parental chromosomes exchange segments with erach other.
(T / F)
Pairing of homologous
chromosomes is called synapse. (T / F)
MULIPLE CHOICE ITEMS.
Choose and encircle
the best possible answer.
1. It is the period of extensive
metabolic activity:
Go c. G2
G1 d. S
2. In human cell, average cell
cycle is about:
6 hours c. 18 hours
12 hours d. 24 hours
3. The period of cell cycle
between two consecutive divisions is termed as:
Prophase c. Telephase
Metaphase d. Interphase
4. The vesicles forming phargmoplast
originate during:
Prophase c. Inter
phase
Metaphase d. Telephase
5. Cancer is caused mainly by
mutations in:
Somatic cells c. G2
stage
Sex cells d. S-phase
6. The interphase of meiosis
lacks:
Go stage c. G2
stage
G1 stage d. S
phase
7. Condensation of chromosomes
reaches to its maximum during:
Leptotene c. Diplotane
Zygotenre d. Diakinesis
8. The sex chromosome complement
in individuals with klinefelter's syndrome is:
XXY c. XXYY
Xy d. XYYY
9. Mitosis is divided into:
Karyokinesis c. Interphase
Cytokinesis d. Both
a & b
10. A female lacking ovaries
and germ cells is probably affected with:
Klinefelter's
syndrome c. Down's syndrome
Turner's syndrome d. Haemophilia
11. The process of meiosis is
completed in ______ divisions:
2 c. 4
3 d. 5
12. The number of daughter cells
produced at the end of meiosis is:
2 c. 6
4 d. 8
13. Meiosis occurs in:
Viruses c. Plants
Bacteria d. Both plants
and animals
14. Small localized tumors are
called:
Benign c. Cancer
Malign d. Interdigitate
15. Reduction in the chromosome
number occurs during:
Meiosis I c. Mitosi
Meiosis II d. Both
a & b
16. Crossing over occurs during:
Leptotene c. Pachytene
Zygotene d. Diplotene
17. Chromatids start moving
towards the respective poles in:
Anaphase c. Prophase
Metaphase d. Diplotene
18. Prophase I of merosis is
further divided into _______ substages:
3 c. 5
4 d. 6
19. The proteins which become
activated during cytokinesis are:
Actin and myosin c. Globulin
Haemoglobin d. Fibrin
20. The length of chromosomes
is:
0.25 - 0.50 um c. 0.60
- 1.2 um
0.40 - 0.80 um d. I
um - 3 um
MATCHING ITEMS.
Match Column
'A' with 'B' and write the correct answer in Column'C'.
1. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Interphase i. Centromere a-
b. Mitotic spindle ii. 4.5 hours b-
c. Kinetochore iii. Resting phase c-
d. G2 phase iv. Aster
& spindle d-
Chromatin
2. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Phragmoplast i. Somatic cells a-
b. Cancer ii. Pachytene b-
c. Tetrad iii. Anaphase I c-
d. Crossing over iv. Plant cell d-
Zygotene
3. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. XXY i. Necrosis a-
b. Cell death ii. Turner's syndrome b-
c. Tissue culture iii. Klinefelter's
syndrome c-
d. Tumor cells iv. Mitosis d-
Metastasis
4. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Karyokinesis i. Pairing a-
b. Tubulin ii. Division of nucleus b-
c. Apoptosis iii. Protein c-
d. Synapsis iv. Leptotene d-
Cell suicide
5. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Meiosis I i. Missing X a-
b. Malignant tumor ii. Diplotene b-
c. Cytokinesis iii. Rapid division c-
d. Turner's syndrome iv. Cell
cleavage d-
G1 phase
LABELLING ITEMS.
Draw neat labeled diagram of
the following:
Mitosis
Meiosis I
A single chromosome
throughout the cell cycle.
*****************************************************
ANSWERS.
COMPLETION ITEMS.
1. Mitotic 2. 90 3. 3
4. Metastasis 5. Zygotene 6. 21
7. 47 8. X 9. 45
10. Apoptosis 11. Necrosis 12. Karyokinesis
13. Tubulin 14. Anaphase 15. 10
16. Down's Syndrome 17. S 18. Mitotic
apparatus
19. Phragmoplast 20. Kinetochore
TRUE/FALSE ITEMS.
1 2 3 4 5 6 7 8 9 10 11 12
T F T T F T T F T F T T
13 14 15 16 17 18 19 20
T T T F F F T F
MULTIPLE CHOICE ITEMS.
1 2 3 4 5 6 7 8 9 10 11 12
b d d b a c d a d b a b
13 14 15 16 17 18 19 20
d a a c a c a a
MATCHING ITEMS.
1 a b c d 2. a b c d
iii iv i. ii iv i. v ii
3. a b c d 4. a b c d
ii i. iv v ii iii v i.
5. a b c d
ii iii iv i.
LABELLING ITEMS.
CHAPTER NO
CHAPTER
NO.21
CELL
CYCLE
COMPLETION ITEMS.
Fill in the blanks.
The period of divison
during cell cycle is called _______ phase.
In yeast cells,
cell cycle is completed in _______ minutes.
During cell division,
_______ sets of microtubules originate from each pair of centrioles.
The spread of tumor
cells and establishment of secondary areas of growth is called _______.
Pairing of chromosomes
starts in _______ stage of prophase-I.
In Down's syndrome,
chromosome no. _______ fails to segregarte.
Individuals with
Down's syndrome have _______ chromosomes.
A person with klinefelter's
syndrome has an extra _______ chromosome.
The persons affected
with Turner's syndrome have _______ chromosomes.
Internal programme
of events and sequence of morphological changes by which cell commits
suicide is called _______.
The cell death due
to tissue damage is called _______.
Division of the
nucleus is called _______.
The microtubules
of centrioles are made of a protein _______.
The most critical
phase of mitosis which ensures equal distribution of chromatids in the
daughter cells is called _______.
In human, S-phase
takes about _______ hours.
Mongolism is also
known as _______.
_______ phase precedes
G2 phase.
The specialized
microtuble structure including aster and spindle is called _______.
_______ is formed
from vesicles which originate from golgi complex.
_______ is the
special area of centromere where spindle fibers attach.
TRUE/FALSE
ITEMS.
Encircle
the correct answer. (T / F)
Interphase is the
period of great biochemical activity. (T / F)
Meiosis occurs in
haploid cells. (T / F)
During S-phase,
DNA is synthesized and chromosome number is doubled. (T
/ F)
Division of the
cytoplasm is called cytokinesis. (T / F)
Equatorial plate
is formed during telophase. (T /
F)
Pharagmoplast is
formed in plants. (T / F)
In mitosis the hereditary
material is equally distributed in the daughter cells. (T
/ F)
The interphase of
meiosis lacks, G1 stage. (T / F)
Go stands
for no gap. (T / F)
Crossing over takes
place during metaphase. (T / F)
During diplotene,
the paired chromosomes repel each other and begin to separate.
(T / F)
The chances of
teenage mother having down's syndrome child is one in many thousands.
(T / F)
Persons with klinefelter's
syndrome produce small testes with no sperms at ejaculation. (T
/ F)
Autosomal non-disjunction
may occur in other than 21st chromosome. (T /
F)
Genetic information
remains unchanged during mitosis. (T / F)
In human cells,
G1 takes about 13 hours. (T / F)
Each kinetochore
gets four fibers each from opposite poles. (T / F)
Individuals with
Turner's syndrome often survive with male appearance. (T
/ F)
During crossing
over, parental chromosomes exchange segments with erach other.
(T / F)
Pairing of homologous
chromosomes is called synapse. (T / F)
MULIPLE CHOICE ITEMS.
Choose and encircle
the best possible answer.
1. It is the period of extensive
metabolic activity:
Go c. G2
G1 d. S
2. In human cell, average cell
cycle is about:
6 hours c. 18 hours
12 hours d. 24 hours
3. The period of cell cycle
between two consecutive divisions is termed as:
Prophase c. Telephase
Metaphase d. Interphase
4. The vesicles forming phargmoplast
originate during:
Prophase c. Inter
phase
Metaphase d. Telephase
5. Cancer is caused mainly by
mutations in:
Somatic cells c. G2
stage
Sex cells d. S-phase
6. The interphase of meiosis
lacks:
Go stage c. G2
stage
G1 stage d. S
phase
7. Condensation of chromosomes
reaches to its maximum during:
Leptotene c. Diplotane
Zygotenre d. Diakinesis
8. The sex chromosome complement
in individuals with klinefelter's syndrome is:
XXY c. XXYY
Xy d. XYYY
9. Mitosis is divided into:
Karyokinesis c. Interphase
Cytokinesis d. Both
a & b
10. A female lacking ovaries
and germ cells is probably affected with:
Klinefelter's
syndrome c. Down's syndrome
Turner's syndrome d. Haemophilia
11. The process of meiosis is
completed in ______ divisions:
2 c. 4
3 d. 5
12. The number of daughter cells
produced at the end of meiosis is:
2 c. 6
4 d. 8
13. Meiosis occurs in:
Viruses c. Plants
Bacteria d. Both plants
and animals
14. Small localized tumors are
called:
Benign c. Cancer
Malign d. Interdigitate
15. Reduction in the chromosome
number occurs during:
Meiosis I c. Mitosi
Meiosis II d. Both
a & b
16. Crossing over occurs during:
Leptotene c. Pachytene
Zygotene d. Diplotene
17. Chromatids start moving
towards the respective poles in:
Anaphase c. Prophase
Metaphase d. Diplotene
18. Prophase I of merosis is
further divided into _______ substages:
3 c. 5
4 d. 6
19. The proteins which become
activated during cytokinesis are:
Actin and myosin c. Globulin
Haemoglobin d. Fibrin
20. The length of chromosomes
is:
0.25 - 0.50 um c. 0.60
- 1.2 um
0.40 - 0.80 um d. I
um - 3 um
MATCHING ITEMS.
Match Column
'A' with 'B' and write the correct answer in Column'C'.
1. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Interphase i. Centromere a-
b. Mitotic spindle ii. 4.5 hours b-
c. Kinetochore iii. Resting phase c-
d. G2 phase iv. Aster
& spindle d-
Chromatin
2. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Phragmoplast i. Somatic cells a-
b. Cancer ii. Pachytene b-
c. Tetrad iii. Anaphase I c-
d. Crossing over iv. Plant cell d-
Zygotene
3. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. XXY i. Necrosis a-
b. Cell death ii. Turner's syndrome b-
c. Tissue culture iii. Klinefelter's
syndrome c-
d. Tumor cells iv. Mitosis d-
Metastasis
4. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Karyokinesis i. Pairing a-
b. Tubulin ii. Division of nucleus b-
c. Apoptosis iii. Protein c-
d. Synapsis iv. Leptotene d-
Cell suicide
5. COLUMN
'A' COLUMN 'B' COLUMN
'C'
a. Meiosis I i. Missing X a-
b. Malignant tumor ii. Diplotene b-
c. Cytokinesis iii. Rapid division c-
d. Turner's syndrome iv. Cell
cleavage d-
G1 phase
LABELLING ITEMS.
Draw neat labeled diagram of
the following:
Mitosis
Meiosis I
A single chromosome
throughout the cell cycle.
*****************************************************
ANSWERS.
COMPLETION ITEMS.
1. Mitotic 2. 90 3. 3
4. Metastasis 5. Zygotene 6. 21
7. 47 8. X 9. 45
10. Apoptosis 11. Necrosis 12. Karyokinesis
13. Tubulin 14. Anaphase 15. 10
16. Down's Syndrome 17. S 18. Mitotic
apparatus
19. Phragmoplast 20. Kinetochore
TRUE/FALSE ITEMS.
1 2 3 4 5 6 7 8 9 10 11 12
T F T T F T T F T F T T
13 14 15 16 17 18 19 20
T T T F F F T F
MULTIPLE CHOICE ITEMS.
1 2 3 4 5 6 7 8 9 10 11 12
b d d b a c d a d b a b
13 14 15 16 17 18 19 20
d a a c a c a a
MATCHING ITEMS.
1 a b c d 2. a b c d
iii iv i. ii iv i. v ii
3. a b c d 4. a b c d
ii i. iv v ii iii v i.
5. a b c d
ii iii iv i.
LABELLING ITEMS.