The major portion of the dry weight of plants comprises of:
1. Nitrogen, phosphorus, and potassium
2. Calcium, magnesium, and sulphur
3. Carbon, nitrogen, and hydrogen
4. Carbon, hydrogen, and oxygen
The most abundant organic compound on earth is:
1. Protein
2. Cellulose
3. Lipids
4. Steroids
Spoilage of oil can be detected by which fatty acid:
1. Oleic acid
2. Linolenic acid
3. Erucic acid
4. None of the above
In plants, inulin and pectin are:
1. Reserved material
2. Wastes
3. Excretory material
4. Insect-attracting material
Phospholipids are esters of glycerol with:
1. | Three carboxylic acid residues |
2. | Two carboxylic acid residues and one phosphate group |
3. | One carboxylic acid residue and two phosphate groups |
4. | Three phosphate groups |
Role of enzyme in reactions is to:
1. Decrease activation energy
2. Increase activation energy
3. Act as an inorganic catalyst
4. None of the above
Which of the following have carbohydrate as prosthetic group :
1. Glycoprotein
2. Chromoprotein
3. Lipoprotein
4. Nucleoprotein
Lipids are insoluble in water because lipid molecules are:
1. Hydrophilic
2. Hydrophobic
3. Neutral
4. Zwitter ions
Collagen is a:
1. Fibrous protein
2. Globular protein
3. Lipid
4. Carbohydrate
Hydrolytic enzymes that act on low pH are called:
1. Protease
2. α-Amylase
3. Hydrolases
4. Peroxidase