NEET Questions - Botany - Cell cycle and Cell Divisions

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Physics Chemistry Botany Zoology

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Which factors are required for growth ?

An increase in group of cells, a duplication of genetic material
An increase in group of cells, production of daughter cells by mitosis
A duplication of genetic material and a division assuring that daughter cells receive an equal complement of genetic material.
An increase in cell mass, a duplication of genetic material, a division assuring that each daughter cell receives an equal complement of the genetic material

With how many cell reproduction starts ?

Two cells
Single cell
Many cells
Somatic cell

A small protein which is attached to outer surface of inner mitochondrial membrane and acts as a mobile carrier for electron transfer between complex III and IV is

Cytochrome a₃
Cytochrome c₁

Ubiquinone

Cytochrome c

At the end of which stage does cell enter mitosis ?

G1 - phase
S - phase
M - phase
G2 - phase

The sequence in the cell cycle is

S, G₁ , G₂ M
G₁ , S G₂ , M
S, M G₁ , G₂, M
G₂ , S, M, G₁

WHICH OF THE FOLLOWING IS AN ASEXUAL STRUCTURE IN BRYOPHYTES ?

GEMMAE
GEMMULES
OOGONIUM
SPHAGNUM

Mitosis actually means

Reduction in number of chromosomes
Division ofnucleus only
Division of cytoplasm only
Both nuclear (Karyokinesis) and cytoplasmic divisions.

Substances that interface with microtubule function interfare with cell division because....

Microtubules are distributed equally in the new cells
Microtubules are involved in precise separate set of chromosomes get into each daughter cells.
Without microtubules, cytokinesis cannot take place and a membrane is formed.
Microtubules are essential for the disappearince of the nuclear membrane and without them the chromosomes have to stay close together within the nuclear membrave to be able to separate into two new nuclei.

Chromosomes can be counted during :

Prophase
Metaphase
Anaphase
Telophase

The nuclear membrane disintegrates and spindle appears at :

Prometaphase
Early prophase
Late telophase
Late prophase

The term ‘karyokinesis’ is used for

Disappearance of nuclear mimbrane during metaphase
Changes occuring at anaphase, when chromosomes move to the opposite poles.
Event occuring during interphase
Over all changes occurring in nucleus during the cell division.

During which phase of prophase-I of meiosis does the process of synapsis occur ?

Pachytene
Zygotene
Leptotene
Diplotene

Which is the longest phase of meitoic division ?

Prophase-I
Metaphase-I
Anaphase-I
Telophase-I

At which stage, the homologous chromosomes separate due to repulsion, but are yet held by chiasmata :

Zygotene
Pachytene
Diplotene
Diakinesis

Significance of meiosis is associated with :

DNA duplication
Asexual reproduction
Sexual reproduction
Growth of the body

NEET Botany Questions: Cell cycle and Cell Divisions