Differentiation

Q.

What is Dedifferentiation?

Q.

What would be expected to happen if:

(a) GA3 is applied to rice seedlings

(b) Dividing cells stop differentiating

(c) A rotten fruit gets mixed with unripe fruits

(d) You forget to add cytokinin to the culture medium.

Q. Identify the incorrect statement related to the formation of tracheary elements from meristematic cells.

1. Loss of protoplasm

2. Develop very strong elastic cell wall

3. Increased cellulose and lignin deposition

4. Primary cell walls are deposited with chitin

Q.

In plants, cell division is restricted to ------------------

1. Meristematic cells

2. Permanent cells

3. Xylem

4. Phloem

Q.

The cells formed from apical meristems undergo maturation. This is called as __.

Q. Development is the sum of growth and __.

Q. Which among the following is not formed as a result of redifferentiation process?

1. Phellem
2. Phelloderm
3. Secondary xylem
4. Interfascicular cambium

Q.

Meristematic cells to form a tracheary element will undergo the following change:

1. Develop chloroplasts

2. Develop lignocellulosic primary cell wall

3. Lose their protoplasm

4. Develop vacuoles

Q. The __ form of cell differentiation has both the determinate and indeterminate aspects.

Q.

The kind of growth that helps the plant grow taller is termed _______

1. Axillary growth

2. Secondary growth

3. Primary growth

4. Apical growth

Q. Interfascicular cambium and cork cambium are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific function. This phenomenon is called

1. Redifferentiation
2. Heterophylly
3. Dedifferentiation
4. Differentation

Q. Interfascicular cambium develops from the cells of :

1. Endodermis
2. Pericycle
3. Medullary rays
4. Xylem parenchyma

Q. To test the effects of growth factors on the differentiation of plant tissue, which among the following would be the best choice of experimental tissue?

1. Dermal tissue
2. Meristematic tissue
3. Vascular tissue
4. Ground tissue

Q.

A biochemical process in plants by which meristematic cells undergo changes and transform into permanent cells is

1. Differentiation

2. Dedifferentiation

3. all the above

4. Redifferentiation

Q. Which process is not involved in the development of grain into a mature wheat plant?

1. Mitosis
2. Meiosis
3. Differentiation of cells
4. Increase in size of cells

Q.

Why do bulliform cells become flaccid?

Q.

Assertion (A): The final cell structure is determined by the location of the cell.

Reason (R): The cells produced from root apical meristem, if they are pushed ahead will develop into root cap and if they are pushed to the side they will develop into epidermis

1. Both A & R are true and R explains A

2. Both A & R are true and R does not explain A

3. A is true and R is false

4. Both A and R are false

Q. Cells of tracheary elements (tracheids and vessels) become dead at maturity and lose their protoplasm due to the deposition of lignocellulosic cell wall thickenings. This is an example of

1. Dedifferentiation
2. Redifferentiation
3. Differentiation
4. Growth

Q. Which of the following represents the differentiation of the cell?

1. Transformation of root cells into root cap
2. Senescence of the cells
3. Formation of new cells near the wounded area of plants
4. Formation of tumour in the plant

Q. Question: In below lines if xylem are young they should be consist of living cells then why it is a part of apoplast ??
"In young roots, water enters directly into the xylem vessels and/or tracheids. these are non-living conduits and so are parts of the apoplast."

Q. To test the effects of growth factors on the differentiation of plant tissue, which among the following would be the best choice of experimental tissue?

1. Dermal tissue
2. Meristematic tissue
3. Vascular tissue
4. Ground tissue

Q. Differentiate between.
Growth and differentiation

Q.

What is meant by differentiation ?

Q. Apoptosis can be induced in a plant organ or the whole plant by a burst of?

1. decay of DNA, RNA
2. Ethylene
3. Cytokinin's
4. Auxin

Q. According to histogen theory, epidermis is formed by

1. Plerome
2. Protoderm
3. Dermatogen
4. Periblem

Q. The length of different internodes in a culm of sugarcane, is variable because of

1. size of leaf lamina at the node below each internode
2. intercalary meristem
3. shoot apical meristem
4. position of axillary buds

Q.

What would be expected to happen if:

(a) GA₃ is applied to rice seedlings

(b) Dividing cells stop differentiating

(c) A rotten fruit gets mixed with unripe fruits

(d) You forget to add cytokinin to the culture medium.

Q. The shoot apical meristem in a dicot embryo is located

1. Between the two cotyledons
2. Within the root apex
3. Around the suspensor
4. In the endosperm

Q. To test the effects of growth factors on the differentiation of plant tissue, which among the following would be the best choice of experimental tissue?

1. Dermal tissue
2. Meristematic tissue
3. Vascular tissue
4. Ground tissue

Q.

The xylem which differentiates has a thick secondary wall made of

1. Suberin
2. Pectin
3. Cellulose
4. Lignin