ribhosome

Question 1

who discovered ribosome?

Answer 1

George Palade

Question 2

structure of ribosomes

Answer 2

Ribosomal RNA (rRNA) and proteins. they are made up of two subunits, one is large is shaped like a dome, and the smaller one forms a cap-like structure over the larger one

Question 3

What is a dimer and how is it formed?

Answer 3

two ribosomal subunit remain united due to the high concentration of Mg^2+ ions in the matrix. reducing the concentration below a certain level leads to the subunits separating, on increasing it the subunit become associated with each other and is known as a dimer.

Question 4

what is Ergasome?

Answer 4

many ribosomes form a chain on a common messenger RNA and form the polyribosomes or polysomes or Ergasome.

Question 5

what are two types of the ribosome? explain each composition and RNA: protein ratio

Answer 5

70s(prokayotic) and 80s(eukaryotic).

1)70s -30s -21 protein and 16 s rRna

The 50s - 34 protein and 23s and 5s rRNA

rna : protein ratio = 60:40

2)80s - 40s -33 protein and a single 18s rRNA

The 60s - 40 protein and three types of

r RNA 28s,5.8,5s

rna:protein = 40:60

Question 6

functions of ribosomes

Answer 6

1. Ribosomes associated with endoplasmic reticulum synthesize secretory proteins
2. Free ribosomes synthesize non-secretory proteins. Which is used inside the cell

Question 7

newly synthesized proteins are processed with the help of wich protein

Answer 7

chaperon proteins