Fibrous And Globular Proteins

Question 1

What functions do fibrous proteins perform

Answer 1

Structural functions

Question 2

What are fibrous proteins made from

Answer 2

Polypeptides I’m parallel chains or sheets with cross linkages to form long fibres

Question 3

Are fibrous proteins soluble or insoluble

Answer 3

Insoluble

Question 4

What is one example of a fibrous protein

Answer 4

Collagen

Question 5

What does a single fibre consist of

Answer 5

Three polypeptide chains twisted around each other

Question 6

Give 4 examples globular proteins

Answer 6

Enzymes, antibodies, plasma proteins and hormones

Question 7

What is the shape of a globular protein

Answer 7

Compact and folded in a spherical shape

Question 8

What does haemoglobin consist of

Answer 8

Four folded polypeptide chains with a iron- containing haem group at the centre

Question 9

Are globular proteins soluble or insoluble

Answer 9

Soluble

Question 10

What is the iron-containing group at the centre of a globular protein called

Answer 10

The haem group

Question 11

What role do globular proteins perform

Answer 11

Metabolic role

Question 12

What is more stable fibrous or globular proteins

Answer 12

Fibrous proteins

Question 13

Is the amino acid sequence regular or irregular in fibrous proteins

Answer 13

Regular

Question 14

Is the amino acid sequence regular or irregular in globular proteins

Answer 14

Irregular