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Q. No.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)
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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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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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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In DNA, the linkages between different nitrogenous bases are:
1. Phosphate linkages
2. H-bonding
3. Glycosidic linkages
4. Peptide linkages
1. Phosphate linkages
2. H-bonding
3. Glycosidic linkages
4. Peptide linkages
Subtopic: DNA, RNA & Metal Ions |
72%
From NCERT
NEET - 2013
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Hints
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The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct?
| 1. | D is the acidic amino acid - glutamic acid |
| 2. | C is an aromatic amino acid - tryptophan |
| 3. | A is the C-terminal amino acid and D is N terminal amino acid |
| 4. | A is the sulphur containing amino acid-methionine |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
53%
NEET - 2013
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Hints
Which of the following best illustrates FEEDBACK in development?
| 1. | Tissue (X) secretes RNA which changes the development of tissue (Y) |
| 2. | As tissue (X) develops, it secretes enzymes that inhibit the development of tissue (Y) |
| 3. | As tissue (X) develops, it secretes something that induces tissue (Y) to develop |
| 4. | As tissues (X) develops, it secretes something that shows down the growth of tissue (Y) |
Subtopic: Vitamins, Hormones & Enzymes |
NEET - 2013
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Hints
Which one of the following is a peptide hormone?
1. Glucagon
2. Testosterone
3. Thyroxin
4. Adernaline
Subtopic: Vitamins, Hormones & Enzymes |
60%
From NCERT
AIPMT - 2006
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During the process of digestion, the proteins present in food materials are
hydrolysed to amino acids as shown below.
Proteins \(\xrightarrow[]{\textbf{Enzyme(A)}}\mathrm{}\) Polypeptides \(\xrightarrow[]{\textbf{Enzyme(B)}}\mathrm{}\) Amino acids
Enzymes (A) and (B) are respectively:
| 1. | Amylase and maltase | 2. | Diastase and lipase |
| 3. | Pepsin and trypsin | 4. | Invertase and zymase |
Subtopic: Vitamins, Hormones & Enzymes |
82%
From NCERT
AIPMT - 2006
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RNA and DNA are chiral molecules due to:
1. L- sugar component
2. Chiral bases
3. Chiral phosphate exter unit
4. D- sugar component
Subtopic: DNA, RNA & Metal Ions |
53%
From NCERT
AIPMT - 2007
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Which one of the following vitamins is water-soluble?
| 1. | Vitamin-B | 2. | Vitamin-E |
| 3. | Vitamin-K | 4. | Vitamin-A |
Subtopic: Vitamins, Hormones & Enzymes |
89%
From NCERT
AIPMT - 2007
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