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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.
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Knowledge Check

  • Consider the following statements (A) Plant cells have centrioles which are absent in almost all animal cells (B) Ribosomes are the site of protein synthesis (C) The middle lamella is a layer made of calcium carbonate which holds the different neighbouring cells together (D) In animal cell, steroidal hormones are synthesised by smooth endoplasmic reticulum Of the above statements

    A
    (A) and (B) only are correct
    B
    (C) and (D) only are correct
    C
    (B) and (D) only are correct
    D
    (A) and (D) only are correct

  • Consider the following statements (A) Plant cells have centrioles which are absent in almost all animal cells (B) Ribosomes are the site of protein synthesis (C ) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together (D) In animal cell steroidal hormones are synthesized by smooth endoplasmicreticulum Of the above statements

    A
    (A) and (B) only are correct
    B
    ( C) and (D) only are correct
    C
    (B) and (D) only are correct
    D
    (A) and (D) only are correct

  • Middle lamella is made up of

    A
    Cellulose
    B
    Suberin
    C
    Calcium and magnesium pectate
    D
    Lignin

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