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11th Biology Weekly Test - 3 ( Bio - Botany - Cell Cycle )

MABS Institution

11th Biology Weekly Test - 3 ( Bio - Botany - Cell Cycle )-Aug 2020

Time : 1.00 Hours

Part - A

Multiple Choice Question - Answer All Question

Crossing over occurs between

Non-homologous chromatids of non homologous chromosomes
Non-sister chromatids of homologous chromosomes
Sister chromatids of homologous chromosomes
Sister chromatids of non homologous chromosome

Many checkpoints control the ____________ .

2C
Cell cycle
Restriction point
G1

Which of the following is not a mitogen?

Giberellin
Ethylene
Kinetin
Colchicine

Cell cycle was discovered by __________ .

Cell cycle
Prevost and Dumans
Eukaryotic cell
Interphase

Chromosomes are attached to the spindle fibres by kinetochore in ____________ .

Prophase
Metaphase
Anaphase
Telophase

During which of the following phases of mitosis asters do appear around the centrioles?

Anaphase
Metaphase
Prophase
Telophase

Number of daughter cells formed at the end of Meiosis I is _____________.

2
4
1
0

Which is a true statement for mitosis?

Cell formed by it performs diverse functions i.e. show division of labour
The number of chromosomes in the new cells are half than that of the parent cell
Two cells formed as a result of this division are identical in all aspects.
Cells formed as a result of mitosis have different genetic characters.

The check point is otherwise called:

Important point
collecting point
restriction point
Controlling point

How does the pairs of homologous chromosomes appear during zygotene phase?

Univalent
Trivalent
Tetravalent
Bivalent

Bouquet arrangement of Chromosome is seen in _____

Pachytere
Leptotene
Zygotene
Diplotene

Which of the following structure will not be common to mitotic cell of a higher plant?

Cell plate
Centromere
Centriole
Spindle fibre

Bivalent aligned at the equator of the cell known as______________ .

Chiasmata
Lampbrush chromosome
Diakinesis
Metaphase plate

Two sets of daughter chromosomes reach opposite poles of the cell in ___________ .

Prophase
Metaphase
Anaphase
Telophase

Significance of meiosis ______

The number of chromosomes is maintained in all cells.
It is an important process for evolution
Due to division, cell can maintain their efficient size.
A very significant contribution of mitosis is cell repair

Prophase is characterized by ______

spliting of centromere
thread like appearance of chromosomes
arrangement of chromosomes on equatorial plate
pairing of homologous chromosome

____________ longest phase of the cell cycle.

4 hours
1hour
Interphase
C-Value

Spindle fibres assemble in _________ .

Chiasmata
Lampbrush chromosome
Diakinesis
Metaphase plate

Centrosome structure was given by ______

John Ray
T. Boweri
Van Benden
Franchi

Amphiastral type cell division is seen in __________ cells.

Fungal
Algal
Plant cells
Animal

Nuclear membrane does not rupture in ____________ .

Meiosis
Mitogen
Mitotic poisons
Endomitosis

Anaphase promoting complex APC is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in human cell, which of the following is expected to occur?

Chromosomes will be fragmented
Chromosomes will not condense
Chromosomes will not segregate
Recombination of Chromosomes will occur

Find out which is incorrect In the following pairs.

Mouse - 40 Chromosomes
Onion - 16 Chromosomes
Human - 46 Chromosomes
Rice - 26 Chromosomes

The minimum number of meiotic divisions required to produce 400 seeds in a pea plant is.

200
700
500
400

______________ is found in animal cells.

Anastral
Amphiastral
Mitosis
Meiosis

In plant cells initiation of spindle fibres takes place, nucleolus disappears is ___________ .

Prophase
Metaphase
Anaphase
Telophase

In ____________ the nuclear envelope remains intact and chromosomes migrate.

Amitosis
Mitosis
Closed Mitosis
Open Mitosis

Cells of mammalian cartilage undergoes __________.

Amitosis
Meiosis
Mitosis
Equational division

Recombination of homologous chromosomes is completed by the end of the stage ___________ .

Leptotene
Zygotene
Pachytene
Diplotene

Damaged cells must be replaced by identical new cells by mitosis.

Cytokinesis
Cell plate
Genetic stability
Repair of tissues

Chiasmata is the point where:

Crossing over takes place
Nuclear division takes place
Cytokinesis occur
Nucleolus disappears

Short, constricted region in the chromosome is __________.

Kinetochore
Centromere
Satellite
Telomere

___________ involves division of nucleus.

Maturation Promoting Factor
Incipient cell division
Karyokinesis
Cytokinesis

In cell cycle ___________ is spent for interphase.

95%
An hour
11 hours
8 hours

Synthesis of RNA and protein takes place in which phase of the cell cycle?

S-phase
M-phase
G₁ - phase
Metaphase

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