5.6 Ribosomes

Question 1

Ribosomes were first observed by _____ in ____ year.

Answer 1

George Palade; 1953

Question 2

Ribosomes are ______ structures first observed as ______ particles under the electron microscope.

Answer 2

granular structures; dense particles

Question 3

Ribosomes are membrane-bound organelles.
T/F

Answer 3

False

Question 4

Ribosomes are composed of ______.

Answer 4

RNA and proteins

Question 5

Ribosome is ______ factory.

Answer 5

Protein factory

Question 6

Protein synthesis in an animal cell occurs on ribosomes present in ______ and ______.

Answer 6

Cytoplasm; Mitochondria

Question 7

Each ribosome has two subunits:

Answer 7

I. Larger subunit
II. Smaller subunit

Question 8

Eukaryotic ribosome is ____, having two subunits, ____ and ____.

Answer 8

80S; (60S and 40S)

Question 9

Prokaryotic ribosome is ____, having two subunits, ____ and ____.

Answer 9

70S; (50S and 30S)

Question 10

‘S’ in ribosomal subunit stands for ______

Answer 10

Sedimentation coefficient (Svedberg’s Unit)

Question 11

The sedimentation coefficient of Ribosome is a measure of _______.

Answer 11

density and size