Which one is not a D-sugar:

1. 2.
3. 4.

Subtopic:  Carbohydrates - Classification & D-L configuration |
 67%
From NCERT
NEET - 2022
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The incorrect statement about the denaturation of proteins is:
1. It results due to change of temperature and pH.
2. It results in the loss of biological activity of proteins.
3. A protein is formed from amino acids linked by peptide bonds.
4. Uncoiling of the helical structure takes place.
Subtopic:  Denaturation of Proteins & Chemical Properties |
 66%
From NCERT
NEET - 2022
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Given below are two statements: 
Statement I:  A unit formed by the attachment of a base to 1' position of sugar is known as a nucleoside.
Statement II:  When nucleoside is linked to phosphorous acid at 5' position of sugar moiety we get nucleotide.
In the light of the above statements choose the correct answer from the options given below:
1.  Statement I is false but Statement II is true.
2.        Both Statement I and Statement II are true.
3.  Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
Subtopic:   DNA, RNA & Metal Ions |
From NCERT
NEET - 2023
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Cheilosis occurs due to a deficiency of:
1. Thiamine  2. Nicotinamide 
3. Pyridoxamine  4. Riboflavin 
Subtopic:  Vitamins, Hormones & Enzymes |
 67%
From NCERT
NEET - 2023
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RNA upon hydrolysis, generates different quantities of different bases. It shows that RNA is :

1. Doubly - stranded.
2. Single - stranded.
3. Triple - helical in structure.
4. Having deoxyribose sugar.
Subtopic:   DNA, RNA & Metal Ions |
 86%
From NCERT
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Which statement accurately describes the behavior of water in an egg when boiled?: 

1. Precipitated out.
2. Adsorbed by the coagulated protein.
3. Absorbed by the eggshell.
4. Both (1) and (3) 
Subtopic:  Denaturation of Proteins & Chemical Properties |
 62%
From NCERT
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Pentaacetate of D-glucose reaction with NH2OH justifies the :

1.  Absence of aldehyde group.
2. Presence of ketone group.
3. Presence of aldehyde group.
4. Presence of alcohol group.
Subtopic:  Carbohydrates - Classification & D-L configuration |
From NCERT
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Match column I with column II and choose the correct option.
Column-I Column-II
(a) Sucrose  (i) Malt sugar
(b) Lactose (ii) Cone sugar
(c) Fructose (iii) Milk sugar
(d) Maltose  (iv) Fruit sugar

1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
3. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
Subtopic:  Carbohydrates - Classification & D-L configuration |
 80%
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The RBC deficiency is a deficiency disease of:

1. Vitamin B1 2. Vitamin B2
3. Vitamin B12 4. Vitamin B6
Subtopic:  Vitamins, Hormones & Enzymes |
 85%
From NCERT
NEET - 2021
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Consider the following statements:

a. Proteins are synthesized by various RNA molecules in the cell and commands for protein synthesis are present in DNA.
b. RNA contains  β-D-ribose and DNA contains  β-D-2-deoxyribose.
c. RNA contains uracil and DNA contains thymine.
d. RNA molecules are of three types, that is, messenger RNA, ribosomal RNA, and transfer RNA

The incorrect statement(s) are : 

1. a, b and d

2. a, b, c and d

3. a, b and c

4. None of the above.

Subtopic:   DNA, RNA & Metal Ions |
 71%
From NCERT
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