brodidit for students
Biological molecules
Class 11 · Biology · 6 questions
Name: ____________________ Date: ____________
Which element is present in all proteins but not in carbohydrates or fats?
- A Nitrogen
- B Hydrogen
- C Oxygen
- D Carbon
The bond that joins two amino acids is a:
- A Glycosidic bond
- B Hydrogen bond
- C Peptide bond
- D Ester bond
Glucose and fructose are:
- A Disaccharides
- B Polysaccharides
- C Lipids
- D Monosaccharides
Sucrose is made of:
- A Glucose and galactose
- B Two fructose units
- C Two glucose units
- D Glucose and fructose
Which polysaccharide is the storage form of glucose in animals?
- A Glycogen
- B Cellulose
- C Starch
- D Chitin
The sugar in DNA is:
- A Deoxyribose
- B Glucose
- C Fructose
- D Ribose
Answer key
1. A, 2. C, 3. D, 4. D, 5. A, 6. A
Amino acids contain an amino group, which carries nitrogen.
Amino acids join by peptide bonds.
They are simple sugars.
Sucrose is a disaccharide of glucose and fructose.
Animals store glucose as glycogen in the liver and muscles.
DNA contains deoxyribose.