RIBOSOMES

Question 1

What are the other name of the ribosomes ?

Answer 1

Proteins / organelles within organelle / Palade particle

Question 2

Who discovered ribosomes ?

Answer 2

Discovered by Palade in animals cells and Robinson and Brown in plant cells.

Question 3

Give some feature of ribosomes ?

Answer 3

1. Non membranous cell organelles
2. Present in both prokaryotes and eukaryotes
3. Most abundant cell organelles

Question 4

What type of ribosomes are present in the prokaryotes ?

Answer 4

70s ribosomes are present

Associated with plasma membrane and cytoplasm

Question 5

What type of ribosomes are present in the eukaryotes

and where ?

Answer 5

In cytoplasm

• free ( non secretory protein)
• bound (over the surface of the RER){secretory protein}

In organelles

• Mitochondria
• Plastids

Question 6

What is the difference between secretory and non secretory protein ?

Answer 6

Secretory protein travel from one place from to other but non-secretory protein doesn’t travel.

Question 7

`What are the two subunits of ribosomes ?

Answer 7

1. Larger (dome-shaped)

2. Smaller (cap-shaped)

Question 8

What is the chemical nature of the ribosomes ?

Answer 8

RIBONUCLEOPROTEIN

{ribonucleic acid + protein}

Question 9

What is required by the union of these subunits ?

Answer 9

Mg 2+ –> 10-4 M / 0.0001 M

Question 10

LEARN ABOUT 70s AND 80s RIBOSOMES FROM THE NOTES.

Answer 10

DONE :D