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Q. No.
Regarding various levels of protein structure, which of the following is not true?
1. The positional information of amino acids in a protein is called the primary structure.
2. Alpha helix is a secondary structure and beta pleated sheet is a tertiary structure of a protein.
3. Tertiary structure is absolutely necessary for the many biological activities of proteins.
4. Quaternary structures are seen in proteins made of more than one polypeptide chain.
Subtopic:  Proteins |
 89%
Level 1: 80%+
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Regarding RuBisCO:

I:  It is the most abundant protein in the whole of the biosphere.
II:  Mg2+ is its activator
 
1. Only I is correct
2.  Only II is correct
3. Both I and II are correct
4.  Both I and II are incorrect
Subtopic:  Proteins |
 74%
Level 2: 60%+
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Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?

1. Ester bonds 2. Hydrogen bonds
3. Electrostatic interaction 4. Hydrophobic interaction
Subtopic:  Proteins |
Level 3: 35%-60%
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Identify the zwitter ion configuration of alanine:

1. 2.
3. 4.
Subtopic:  Proteins |
 75%
Level 2: 60%+
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
Assertion (A): Dietary proteins are the source of essential amino acids.
Reason (R): All essential amino acids are aromatic.
In the light of the above statements, choose the correct answer from the options given below:
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Proteins |
 88%
Level 1: 80%+
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Identify the incorrectly match pair:
1. RuBisCO Most abundant protein in the whole of the biosphere
2. Insulin A polymer of fructose
3. Vinblastin A secondary metabolite used as a drug
4. Adenine A substituted purine
Subtopic:  Proteins | Primary & Secondary Metabolites |
 76%
Level 2: 60%+
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Identify the incorrect statement:
1. Insulin is a polymer of fructose.
2. Cellulose is a homopolymer
3. Starch is a homopolymer
4. Chitin is nitrogen containing complex polysaccharide
Subtopic:  Proteins |
 74%
Level 2: 60%+
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A pure protein should normally have

1. Two ends 2. One end
3. Three ends 4. No ends

Subtopic:  Proteins |
 90%
Level 1: 80%+
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Identify the substances having a glycosidic bond and peptide bond, respectively in their structure:

1. Glycerol, trypsin 2. Cellulose, lecithin
3. Inulin, insulin 4. Chitin, cholesterol 
Subtopic:  Proteins | Carbohydrates |
 67%
Level 2: 60%+
NEET - 2020
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