Biological molecules

Which element is present in all proteins but not in carbohydrates or fats?

• 1 Nitrogen
• 2 Hydrogen
• 3 Oxygen
• 4 Carbon

The bond that joins two amino acids is a:

• 1 Glycosidic bond
• 2 Hydrogen bond
• 3 Peptide bond
• 4 Ester bond

Glucose and fructose are:

• 1 Disaccharides
• 2 Polysaccharides
• 3 Lipids
• 4 Monosaccharides

Sucrose is made of:

• 1 Glucose and galactose
• 2 Two fructose units
• 3 Two glucose units
• 4 Glucose and fructose

Which polysaccharide is the storage form of glucose in animals?

• 1 Glycogen
• 2 Cellulose
• 3 Starch
• 4 Chitin

The sugar in DNA is:

• 1 Deoxyribose
• 2 Glucose
• 3 Fructose
• 4 Ribose

Triglycerides are made of glycerol and:

• 1 Three amino acids
• 2 Three sugars
• 3 Three nucleotides
• 4 Three fatty acids

The test for protein is the:

• 1 Emulsion test
• 2 Iodine test
• 3 Benedict's test
• 4 Biuret test

Benedict's solution is used to test for:

• 1 Proteins
• 2 Reducing sugars
• 3 Lipids
• 4 Starch