One of the essential α-amino acids is:

1. Lysine 2. Glycine
3. Serine 4. Proline

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 74%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Insulin, a protein acts as:

1. an antibody

2. a hormone

3. an enzyme

4. a transport agent

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 84%
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Which one of the following vitamins contains a metal atom?

1. Riboflavin

2. Vitamin B12

3. Vitamin A

4. Vitamin B6

Subtopic:  Vitamins, Hormones & Enzymes |
 75%
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Adenosine is an example of:

(1) nucleotide

(2) nucleoside

(3) purine base

(4) pyrimidine base

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 79%
From NCERT
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In both DNA and RNA heterocyclic base and phosphate ester linkages are at:
1. \(C^1_5\) and \(C^1_2\) respectively of the sugar molecule.
2. \(C^1_2\) and \(C^1_5\) respectively of the sugar molecule.
3. \(C^1_1\) and \(C^1_5\) respectively of the sugar molecule.
4. \(C^1_5\) and \(C^1_1\) respectively of the sugar molecule.

Subtopic:   DNA, RNA & Metal Ions |
 55%
From NCERT
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Which one of the following statements is correct ?

1. All amino acids are optically active

2. All amino acids except glycine are optically active

3. All amino acids except glutamic acid are optically active

4. All amino acids except lysine are optically active

Subtopic:  α - Amino Acids, Peptide Bond, Proteins & Structure |
 86%
From NCERT
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α-D-glucose and β D-glucose have a specific rotation of +112° and +19° respectively. In aqueous solution the rotation becomes +52°. This process is called:

(1) inversion

(2) racemisation

(3) mutarotation

(4) enolisation

Subtopic:  Carbohydrates - Classification & D-L configuration |
 73%
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The incorrect statement among the following is:

1. Insulin maintains the sugar level in the blood of a human body.
2. Ovalbumin is a simple food reserve in egg white.
3. Blood proteins thrombin and fibrinogen are involved in blood clotting.
4. Denaturation makes the proteins more active.
Subtopic:  Denaturation of Proteins & Chemical Properties |
 88%
From NCERT
NEET - 2017
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The central dogma of molecular genetics states that the genetic information flows from
(1) amino acids  proteins  DNA

(2) DNA  carbohydrates  proteins

(3) DNA  RNA  proteins

(4) DNA  RNA  carbohydrates

 

Subtopic:   DNA, RNA & Metal Ions |
 91%
NEET - 2016
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The correct corresponding order of names of four aldoses with configuration given below

respectively, is
1. L-erythrose, L-threose, L-erythrose, D-threose

2. D-threose, D-erythrose, L-threose, L-erythrose

3. L-erythrose, L-threose, D-erythrose, D-threose

4. D-erythrose, D-threose, L-erythrose, L-threose

Subtopic:  Carbohydrates - Classification & D-L configuration |
 50%
NEET - 2016
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