Cell Wall

Q.

Cheek cells do not have ______.

1. cell membrane

2. nucleus

3. golgi apparatus

4. plastids

Q. Middle lamella is composed mainly of:

1. Phosphoglycerides
2. Hemicellulose
3. Muramic acid
4. Calcium pectate

Q. Plasmodesmata are:

1. Connection between adjacent cells
2. Lighnified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma

Q.

What are chitin and cellulose?

Q.

Match the following layers of the cell wall with their components:

Column I (Layer) Column II (Component)

i). Cellulose a. Middle lamella

ii). Pectin b. Secondary cell wall

iii). Lignin c. Primary cell wall

1. i).$\Rightarrow$ a., ii). $\Rightarrow$ c., iii). $\Rightarrow$ b

2. i).$\Rightarrow$ c., ii). $\Rightarrow$ a., iii). $\Rightarrow$ b

3. i).$\Rightarrow$ c., ii). $\Rightarrow$ b., iii). $\Rightarrow$ a

4. i).$\Rightarrow$ b., ii). $\Rightarrow$ c., iii). $\Rightarrow$ a

Q.

Fill in the blanks:​
(ii) The plasma protein, globulin, helps in mechanism.​

Q. Middle lamella is composed of

1. carbohydrate
2. calcium pectate
3. protein
4. peptidoglycan

Q.

Do cells have envelopes?

Q. Explain the schematic representation of gaseous exchange in tissue.