Question

Distinguish between the following pairs Smooth ER and Rough ER Cell wall and cell membrane Chloroplast and mitochondria.

Answer 1

• Smooth ER (Endoplasmic Reticulum)

1. It is smooth due to absence of Ribosomes.
2. It helps in transport of steroids and lipids.

• Rough ER (Endoplasmic Reticulum)

1. It is’rough due to presence of Ribosomes.
2. It helps in protein synthesis

• Cell wall

1. It is seen only in plant cells.
2. It is made of cellulose.

• Cell membrane

1. It is seen in plant and animal cells.
2. It is made of proteins and lipids.

• Chloroplast

1. It is a organelle seen only in plant cells (green plants)
2. It helps in synthesis and storage of starch.

• Mitochondria

1. It is a organelle seen in plant and animal cells.
2. It is the centre of respiration in a cell and produces energy.