Globular vs Fibrous Proteins (6 marker)

Question 1

What is the structure of globular proteins?

Answer 1

Globular proteins:
1. Compact, spherical, with a complex 3D shape.

2. Soluble in water due to the tertiary structures, which are folded so that the hydrophobic R-groups are kept away from the aqueous environment -hydrophilic R-groups are on the outside
3. Examples: enzymes (e.g., amylase), hormones (e.g., insulin).

Question 2

What is the structure of fibrous proteins?

Answer 2

1. Long, linear, with repetitive amino acid sequences.
2. Insoluble in water due to hydrophobic R groups facing away from the aqueous environment.
3. Examples: collagen, keratin.

Question 3

What is the function of globular proteins?

Answer 3

Functional proteins, so play roles in:
1. catalysis (enzymes)
2. transport (hemoglobin)
3. regulation (hormones).

Question 4

What are the roles of fibrous molecules?

Answer 4

Structural proteins so play roles in: support and strength (e.g., collagen in connective tissue, keratin in hair/nails).

Question 5

What is the type of bonding found in Globular proteins?

Answer 5

Variety of bonds maintain tertiary structure (hydrogen, ionic, disulfide).

Question 6

What is the type of bonding found in the Fibrous proteins?

Answer 6

Rely on strong covalent and hydrogen bonds provide stability, with less complex folding.