Adult human haemoglobin consists of:

(1) 2 subunits (β, β)                           

(2) 2 subunits (α, α)

(3) 4 subunits (2α, 2β)                      

(4) 3 subunits (2α, 1β)

Subtopic:  Structural Organisation of Proteins |
 91%
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Long protein chain folded upon itself like a hollow woolen ball and gives us a 3-dimensional view of a protein belongs to
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure

Subtopic:  Structural Organisation of Proteins |
 85%
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Which of the following statements is not correct about proteins?

1. The first amino acid of all the proteins is also known as N-terminal amino acid

2. In proteins, only right handed helics are observed

3. α- helics are tertiary structures of proteins 

4. Primary structure of a protein dictates its secondary and tertiary conformations

Subtopic:  Structural Organisation of Proteins |
 76%
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Identify the incorrect statement regarding the structure of proteins:

1. They are heteropolymers containing strings of amino acids.
2. The first amino acid in the primary structure is the N-terminus amino acid
3. Only left helices are observed in proteins
4. Tertiary structure is absolutely essential for many biologic functions of the proteins
Subtopic:  Structural Organisation of Proteins |
 82%
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Which of the following is not the function of protein

(1)Act as hormones

(2)act as enzymes

(3)act as genetic material

(4)fight against infections

Subtopic:  Structural Organisation of Proteins |
 80%
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G.N. Ramachandran discovered the structure of collagen which is a/an:

1. Alpha helix

2. Beta pleated sheet

3. Triple helix

4. Icosahederon

Subtopic:  Structural Organisation of Proteins |
 52%
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The quaternary structure of a protein:

(1) Consists of 4 subunits - hence the name quaternary

(2) Is unrelated to the function of the protein

(3) Both (a) and (b)

(4) Depends on the 1° structure of subunits

Subtopic:  Structural Organisation of Proteins |
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