Telophase

Q.

What Parts of the Cell Are Involved in Cell Division?

Q. Microtubules are the constituents of

1. Spindle fibres, centrioles and cilia
2. Centrioles, spindle fibres and chromatin
3. Cilia, flagella and peroxisomes
4. Centrosome, nucleosome and centrioles

Q. Condensation of chromatin and decondensation of chromosomes occur respectively during

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

Q.

Comment on the statement- Telophase is reverse of prophase.

Q.

What are the 5 stages of the cell cycle?

Q.

What happens in diakinesis of prophase I?

Q.

In which stage chromosome is minimum coiled?

Q.

Does the cell show Golgi complexes, nucleolus, and endoplasmic reticulum towards the end of prophase?

Q. The S-phase of cell cycle is characterized by:

1. Duplication of chromosome
2. Shortening of chromosome
3. Duplication of DNA
4. Duplication of centriole

Q. If a cell has a twice as much DNA as a normal functional cell, it means that the cell

1. is preparing to divide
2. has completed division
3. has reached the end of its life span
4. has ceased to function

Q. The given figure shows the structure of nucleosomes with their parts labelled as A, B and C. Identify A, B and C.

1. A – DNA; B – H1 histone; C – Histone octamer
2. A – H1 histone; B – DNA; C – Histone octamer
3. A – Histone octamer; B – RNA; C – H1 histone
4. A – RNA; B – H1 histone; C – Histone octamer

Q.

What happens in the prometaphase of mitosis?

Q. Select the correct statement.

1. Chromatids separate but remain in the centre of the cell during anaphase
2. Chromatids move to the opposite poles during telophase
   
3. Golgi complex and ER are visible at the end of prophase
4. Alignment of chromosomes at the centre occurs during metaphase

Q. Arrange these in order of occurrence during mitosis:
1. Sister chromatids separate
2. Chromosomes align at the centre of the cell
3. Nuclear envelope disappears
4. Chromosomes undergo decondensation

1. 3, 2, 1, 4
2. 1, 2, 3, 4
3. 4, 3, 2, 1
4. 4, 1, 2, 3

Q. Transcription occurs in which strand?either template strand or coding strand

Q. DNA is directly involved in the synthesis except that of

1. DNA
2. Protein
3. tRNA
4. mRNA

Q. A cell with two nuclei is observed during which stage?

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

Q. While performing an experiment, a student observed that a cell under the microscope undergoing mitosis is at the telophase stage but not showing any furrow initiation. What can be the possible consequence of this?
[1 mark]

1. Aneuploidy
2. Polyploidy
3. Monoploidy
4. Haploidy

Q.

Name the type of cell division that occurs during:

Growth of shoot.

Q.

Why is the centrosome duplicated once every cell cycle?

Q. The events shown below occur during different phases:
a. Centromere splits, chromatids separate and move to opposite poles, chromatids are now called chromosomes.
b. Chromosomes cluster at opposite poles, decondensation of chromosomes, reappearance of the nuclear membrane, golgi bodies, and the ER.
c. Chromosomal replication.
d. Kinetochores attach to spindle fibres and chromosomes are arranged at the equatorial plate.
e. Condensation of chromosomal materials.

Which of the following correctly identifies each of the phases described?

1. Interphase	Prophase	Metaphase	Anaphase	Telophase
   c	e	d	a	b

2. Interphase	Prophase	Metaphase	Anaphase	Telophase
   c	d	e	a	b

3. Interphase	Prophase	Metaphase	Anaphase	Telophase
   c	e	d	b	a

4. Interphase	Prophase	Metaphase	Anaphase	Telophase
   c	a	d	e	b

Q. Assertion: In eukaryotes, replication and transcription occur in the nucleus but translation takes place in the cytoplasm.

Reason: Pre-processed mRNAs are transferred from the nucleus to the cytoplasm where they get processed and then translated by the ribosomes in the cytoplasm.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but the reason is false
4. Both assertion and reason are false

Q.

1. Centriole
2. Chromocentre
3. Chromosome
4. Kinetochore

Q. In regulation of gene expression in prokaryotes
I. Lactose acts as a suppressor for the gene expression.
II. Tryptophan acts as an inducer for the gene expression.
III. Regulatory gene is the one that produces the repressor molecule.
Choose the correct options.

1. II and I
2. Only II
3. Only I
4. Only III

Q. Which of the following events precede reorganisation of the nuclear envelope during the M-phase of the cell cycle?

1. Decondensation of chromosomes and reorganisation of nuclear lamina
2. Transcription of chromosomes and reorganisation of nuclear lamina
3. Formation of phragmoplast and contractile ring
4. Transcription of chromosomes and formation of the contractile rings

Q. Which one of the following animals possesses giant chromosome?

1. Drosophila
2. Mouse
3. Xenopsylla
4. Branchiomyces

Q. Amitosis is?

1. Cleavage of nucleus without recognizable chromosomes
2. Division in which chromosomes are unequally distributed
3. A division in which chromosome bridges are formed
4. Spindles are formed

Q. Meiosis II is said to be similar to mitosis, however the two differ in some aspects like
a. In meiosis II, the two daughter cells formed from each cell are generally genetically different
b. Meiosis II is initiated immediately after cytokinesis
c. In animals, mitosis takes place in both haploid and diploid cells
d. Synaptonemal complex is formed in meiosis II
e. Centromere does not divide in meiosis II
The correct statements are

1. a, d & e
2. b, c & e
3. a & b
4. b & e

Q. Which is the main PROOF READING enzyme in DNA REPLICATION ?

Q. Chromosomes found in the salivary glands of Drosophila are

1. Lampbrush
2. Polytene
3. Supernumerary
4. B-chromosomes