Home
Class 11
BIOLOGY
Assertion : The middle lamella is a laye...

Assertion : The middle lamella is a layer made up of calcium pectate.
Reason : It holds the different neighouring cells together.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Middle lamella is a thin, amorphous and cementing layer between the primary walls of two adjacent cells. Middle lamella is the first layer which is formed from cell plate between newly formed daughter cells at the outer side of surface cells. It is made up of calcium and magnesium pectates.
Promotional Banner

Similar Questions

Explore conceptually related problems

The middle lamella is made up of ____

Assertion: Phloem fibres or bast fibres are made up of collenchymatous cells. Reason: Phloem fibres are generally found in primary phloem.

Assertion : The fimbriae are elongated tubular structures made of a special protein. Reason : The pili are small bristle like fibres sprouting out of the cell.

Assertion (A) : Tissue is a group of dissimilar cells. Reason (R) : Muscle is made up of Muscle cell.

Assertion : Euglena is called as plant animal. Reason : Pellicle of Euglena is made up of cellulose and not protein.

Assertion (A): Hypolimnetic layer of water is always cold. Reason(R): The water holds the temperature of soil at the bottom of pond.

Assertion (A): In sponges, the outer layer is formed of pinacocytes. Reason (R) : Pinacocytes are plate-like cells that maintain the size and structure of the sponge.

Assertion (A) : Stem cells can form different types of cells. Reason (R) : They are found in plants and animals.

Assertion: A simple tissue is made of only one type of cells. Reason: Various simple tissues in plants areparenchyma, collenchyma and sclerenchyma.