Match the different levels of protein organization with their definition.

Levels of organization:
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure

Definitions:
A. Linear sequence of amino acids in the polypeptide chain
B. Three-dimensional structure of a polypeptide
C. Highly regular local sub-structures such as α-helix and β-pleated sheet structures
D. Three-dimensional structure of a multi-subunit protein

Select one:
a. 1-C, 2-D, 3-B, 4-A
b. 1-A, 2-C, 3-B, 4-D
c. 1-D, 2-A, 3-B, 4-C
d. 1-A, 2-B, 3-D, 4-C
e. 1-C, 2-D, 3-A, 4-B

Answer: b.
Primary - sequence of amino acids with peptide bonds
Secondary - a-helix and b-pleated sheets with hydrogen bonds
Tertiary- 3D structure held together by R-group (most proteins only go to this level)
Quaternary- multiple sequences of amino acid chains

Answer Link

steffimarish steffimarish · Answer 2 · 2019-10-04T13:50:27+02:00

The protein undergoes multiple modifications in order to perform it's function and the structural significance of each type is given below.

Answer: Option B

Explanation:

The protein definitions are as follows:

Primary structure- Linear sequence of amino acids in the polypeptide chain.

Secondary structure- Highly regular local sub-structures such as α-helix and β-pleated sheet structures.

Tertiary structure- It is the Three-dimensional structure of a polypeptide.

Quatenery structure- Three-dimensional structure of a multi-subunit protein.