Question

1) Distinguish between the structures and functions of the smooth and rough endoplasmic reticulum.

2) What types of cells might have lots of smooth ER? (HINT: which organ in your body detoxifies drugs?)

3) What is a lysosome? Compare to an organ in your body. What two functions does it do in a cell?

Answer 1

1 (a) Smooth endoplasmic reticulum looks like circular mark which they are interlocking tubercular sheets. But rough endoplasmic reticulum looks like arrangements of double membrane.

(b) Smooth endoplasmic reticulum does not contain ribosomes, but rough endoplasmic reticulum contain ribosomes.

(c) smooth endoplasmic reticulum produce lipids, but rough endoplasmic reticulum produce protein and few hormones .

(d) smooth endoplasmic reticulum composed of tubules, but rough endoplasmic reticulum composed of cisternae.

2 - Hepatocytes ( liver as organ) .

3- Lysosome - It is an organelle of eukaryotic cells that contains degradative enzymes enclosed in a membrane.

Liver , kidney and pancreas .

Functions - (a) it helps in to remove the waste products of a cell and also helps in destroying the cell after it get died.

(b) it helps in digestion and waste removal for cells.

(c) it helps in protein synthesis.

(d) it helps in osteogenesis.