Ribosomes, ER, Golgi body, Lysosomes, Protein Trafficking

Question 1

What is the function of ribosomes?

Answer 1

Site of translation of mRNA into polypeptides

Question 2

What is the structure of Rough Endoplasmic Reticulum?

Answer 2

network of flattened membrane-bound sacs, presence of ribosomes on surface, single membrane

Question 3

What is the function of Rough Endoplasmic Reticulum?

Answer 3

presence of enzymes within the rough ER lumen that carry out post-translational modifications of proteins synthesized by the ribosomes

Question 4

What is the structure of Smooth Endoplasmic Reticulum?

Answer 4

network of fine membranous tubules, absence of ribosomes of surface, single membrane

Question 5

What is the function of Smooth Endoplasmic Reticulum?

Answer 5

: lipid synthesis, required by cell as structural component of membranes.

Question 6

What is the structure of Golgi Body?

Answer 6

made up of several flattened membrane-bound sacs known as cisternae, single membrane

Question 7

What is the function of Golgi Body?

Answer 7

1. further post-translational modifications of proteins and lipids received from the ER
2. sorting and packing of proteins before being targeted to various cellular locations
3. synthesis and chemical modification of lipids
4. formation of secretory vesicles

Question 8

What is the structure of lysosomes?

Answer 8

small vesicles that are single membrane and contains hydrolytic enzymes

Question 9

What is the function of lysosomes?

Answer 9

compartmentalize hydrolytic enzymes from the rest of cell