SCIENCE
CELL BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
is very soft and flexible
|
|
|
is very rigid, and supports the plant cell, giving it its shape
|
|
|
is the part that is inside the plant’s nucleus
|
|
|
None of the above
|
Detailed explanation-1: -(d)Pectin. Hint: The thick secondary cell wall is what gives the mature plant cells its strength and rigidity and its particular cell shape. There are other layers too named primary and middle lamella which are made of cellulose and pectin respectively.
Detailed explanation-2: -Cell wall gives shape and support to the plant cell. Cell wall can hold the plant cells together and this will provide strength to the plant. Cell wall provide protection to plant cells from changing climatic conditions.
Detailed explanation-3: -In a plant cell, a stiff wall surrounds the membrane, giving the cell a rigid, boxlike shape. The cell membrane protects the cell and regulates what substances enter and leave the cell. Most mature plant cells have one large vacuole.
Detailed explanation-4: -Cellulose makes the cell wall of plant cells rigid.
Detailed explanation-5: -New research modeling the plant cell wall reveals that chains of cellulose bundle together within the cell wall and slide against each other when the cell is stretched, providing a unique combination of strength and extensibility.