PU M 2026 Biological Molecules Free Quiz 1

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PU M 2026 Biological Molecules Free Quiz 1

PU M Quiz

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Remaining: 10

Navigator 10 Q

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General 10 MCQs

1. Which molecule is most abundant in living organisms?

A. Water B. Proteins C. Carbohydrates D. Lipids

2. What type of bond forms between water molecules?

A. Ionic bonds B. Covalent bonds C. Hydrogen bonds D. van der Waals forces

3. Which property of water allows it to resist temperature changes?

A. Low specific heat B. High density C. Low density D. High specific heat

4. Why is water called a universal solvent?

A. Universal solvent B. Density C. Color D. Odor

5. What is the general formula of carbohydrates?

A. (CH2O)n B. C2H4O2 C. CH4O D. C6H12O6

6. What are the simplest carbohydrates called?

A. Disaccharides B. Monosaccharides C. Polysaccharides D. Lipids

7. Which carbohydrate is the main source of energy for cellular respiration?

A. Fructose B. Sucrose C. Glucose D. Starch

8. Are lipids hydrophobic or hydrophilic?

A. Hydrophobic B. Hydrophilic C. Both D. Neither

9. What is the structure of a triglyceride?

A. One glycerol and three fatty acids B. One glycerol and three fatty acids C. One glycerol and four fatty acids D. Only glycerol

10. Why do phospholipids form a bilayer in cell membranes?

A. Hydrophobic heads B. Hydrophilic tails C. Hydrophilic heads and hydrophobic tails D. No bilayer

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