Which of the following is a basic amino acid?
1. Alanine
2. Tyrosine
3. Lysine
4. Serine
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
Sucrose on hydrolysis gives:
1. -D-Glucose + -D-Glucose
2. -D-Glucose + -D-Fructose
3. -D-Fructose + -D-Fructose
4. -D-Glucose + -D-Fructose
The reaction of concentrated sulphuric acid with carbohydrates (C12H22O11) is an example of:
1. Dehydration
2. Oxidation
3. Reduction
4. Sulphonation
Deficiency of which vitamin causes osteomalacia ?
1. | Vitamin A | 2. | Vitamin D |
3. | Vitamin K | 4. | Vitamin E |
Which of the following statement is not true about glucose?
1. It is an aldohexose.
2. It contains five hydroxyl groups.
3. It is a reducing sugar.
4. It is an aldopentose.
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
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 |
Which of the following is not a fat-soluble vitamin?
1. Vitamin A
2. Vitamin B complex
3. Vitamin D
4. Vitamin E
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)