Totipotency

Q. Cytokinin helps in delay of leaf senescence by:

1. Increasing more water absorption by root
2. Increasing rate of translocation of organic solutes
3. Promoting nutrients mobilization
4. Formation of adventitious buds

Q.

The capacity to generate a whole plant from any cell/explants is called:

1. Pluripotency

2. Cell cloning

3. Tissue culture

4. Totipotency

Q.

The concept of cellular totipotency was established by which scientist?

1. White

2. Haberlandt

3. Steward

4. Muir

Q.

What is the difference between multipotent and pluripotent cells?

Q.

Regeneration of a plant cell to give rise to a new plant is called

1. Pluripotency

2. Budding

3. Totipotency

4. Reproduction

Q. The edible part of the coconut is ______.

1. free-nuclear endosperm
2. pericarp
3. both a and c
4. cellular endosperm

Q.

Cytokinins are predominantly present in

1. Permanent tissue

2. Meristematic tissue

3. Endodermis

4. Cortical region

Q.

Type of cleavage in an egg is determined by _____.

Q.

In a tissue culture medium, the embryoids formed from pollen grains is due to

1. Double fertilisation

2. Cellular totipotency

3. Organogenesis

4. Test tube culture

Q. Gibberellin promotes cell elongation and division in

1. Roots
2. Shoots
3. All of these
4. Leaves

Q. What is the purpose of adding inorganic salts in the culture medium for tissue culture?

1. They act as an energy source for the explant
2. They help in building up necessary proteins for growing explant
3. They help in providing necessary macro and micronutrients to the explant
4. They help in inducing cell divisions in the explant

Q.

What are the two types of stem cells?

Q. Totipotency means:

1. period of dormancy
2. ability to pollinate
3. ability to regenerate
4. process of interbreeding

Q. Differentiate between totipotent and pluripotent stem cells.

Q. The plants developed by tissue culture of a specific plant tissue or part are known as ________.

1. somatic hybrids
2. somaclones
3. cambium
4. explants

Q. Assertion :The arrangement of axonemal microtubules in cilia or flagella is called $9+2$ array. Reason: The axoneme usually has nine pairs or doublets of radially arranged peripheral microtubules, and a pair of centrally located microtubules.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Describe the tissue culture technique and what are the advantages of tissue culture over conventional method of plant breeding in crop improvement programmes.

Q. Which type of cells demonstrate cellular totipotency?

1. All plant cells
2. Only bacterial cells
3. Only gymnosperm cells
4. All eukaryotic cells

Q. Distinguish between the following on the basis of what is given in the brackets.

$\left(iii\right)$ Mitosis in animal and plant cell $\left(\text{occurrence}\right).$

Q. Somatic embryo develops in tissue culture from :-

1. Somatic cell
2. Single germline cell
3. Any fertilised cell
4. egg cell
   

Q. Which of the following plant cells will show totipotency?

1. Meristem
2. Cork cells
3. Sieve tubes
4. Xylem vessels

Q. Which of the following can be called as embryonic stem cells?

1. Stem cells isolated from liver
2. Stem cells isolated from blastula
3. Stem cells isolated from skin
4. Stem cells isolated from umbilical cord

Q. What is totipotency? Describe the important method of tissue culture with the help of diagram.

Q. Cellular totipotency means

1. Synthesis of new cells.
2. Formation of new species.
3. Formation of new plants.
4. Capability of plant cell to form complete plant.

Q. In Pinus, endosperm cells have $30$ chromosomes then how many chromosomes are present in sieve cells

1. $30$
2. $60$
3. $10$
4. $15$

Q. Assertion :In tissue culture, whole plant can be produced from plant cell Reason: The capacity to generate a whole plant from any cell/ explant is called totipotency

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. How does zona pellucida of ovum help in preventing polyspermy?

Q. Mention the property of plant cells that has helped in growing crops by tissue culture.

Q.

The capacity to generate a whole plant from any cell/explants is called:

1. Pluripotency

2. Cell cloning

3. Tissue culture

4. Totipotency

Q. Match the columns.

	Column I		Column II
a	Neutrophils	$1$	Single large nucleus
b	Eosinophils	$2$	$2-3$ lobed nucleus
c	Basophils	$3$	Kidney shaped nucleus
d	Lymphocytes	$4$	$2-7$ lobed nucleus
e	Monocytes	$5$	Bilobed nucleus

1. $a-4,b-5,c-2,d-1,e-3$
2. $a-2,b-5,c-1,d-4,e-3$
3. $a-2,b-4,c-5,d-3,e-1$
4. $a-4,b-1,c-3,d-5,e-2$
5. $a-1,b-4,c-3,d-2,e-5$