Which of the following metal ions activates many enzymes participating in the oxidation of glucose to produce ATP and with Na it is also responsible for the transmission of nerve signals:

1. Copper

2. Calcium

3. Potassium

4. Iron

Subtopic:  Vitamins, Hormones & Enzymes |
 75%
From NCERT
NEET - 2020
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Which of the following is a basic amino acid?

1. Alanine

2. Tyrosine

3. Lysine

4. Serine 

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 86%
From NCERT
NEET - 2020
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Sucrose on hydrolysis gives:

1. α-D-Glucose + β-D-Glucose

2. α-D-Glucose + β-D-Fructose

3. α-D-Fructose + β-D-Fructose

4. β-D-Glucose + α-D-Fructose

Subtopic:  Polysaccharides & their Importance |
 86%
From NCERT
NEET - 2020
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The reaction of concentrated sulphuric acid with carbohydrates (C12H22O11) is an example of:

1. Dehydration 2. Oxidation
3. Reduction 4. Sulphonation
Subtopic:  Polysaccharides & their Importance |
 62%
From NCERT
NEET - 2020
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Deficiency of which vitamin causes osteomalacia ?

1. Vitamin A 2. Vitamin D
3. Vitamin K 4. Vitamin E
Subtopic:  Vitamins, Hormones & Enzymes |
 79%
From NCERT
NEET - 2020
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Which structure(s) of proteins remains(s) intact during denaturation process?

1. Both secondary and tertiary structures

2. Primary structure only

3. Secondary structure only

4. Tertiary structure only

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 81%
From NCERT
NEET - 2019
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Fructose reduces Tollen's reagent due to:

1. Primary alcoholic group
2. Secondary alcoholic group
3. Enolisation of fructose followed by conversion to aldehyde by base
4. Asymmetric carbon
Subtopic:  Carbohydrates - Classification & D-L configuration |
 69%
From NCERT
AIPMT - 2010
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Which of the following is not a fat-soluble vitamin?

1. Vitamin A 

2. Vitamin B complex

3. Vitamin D 

4. Vitamin E

Subtopic:  Vitamins, Hormones & Enzymes |
 93%
From NCERT
AIPMT - 2011
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The correct statements regarding "Denaturation" are:

(a) Denaturation of proteins causes the loss of secondary and tertiary structures of the protein. 
(b) Denaturation leads to the conversion of a double strand of DNA into a single strand.
(c) Denaturation affects the primary structure which gets distorted.


1. (a), (b) and (c)
2. (b) and (c)
3. (a) and (c)
4. (a) and (b)

Subtopic:  Denaturation of Proteins & Chemical Properties |
 84%
From NCERT
AIPMT - 2011
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α-D-glucose and β-D-glucose are:

1. Epimers

2. Anomers

3. Functional isomers

4. Chain isomers

Subtopic:  Carbohydrates - Classification & D-L configuration |
 83%
From NCERT
AIPMT - 2000
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