Quiz  /  Biochemistry Class 10 MCQ Questions With Answers

  • 1. 
    Vitamin present in citrus fruit is

  • A
  • B
  • C
  • D

  • 2. 
    Enzymes are

  • nucleic acids
  • proteins
  • lipids
  • carbohydrates

  • 3. 
    Fats, oils, waxes & hormones are examples of ______.

  • Carbohydrates
  • Lipids
  • Proteins
  • Nucleic acids

  • 4. 
    Nucleotides are monomers of

  • Carbohydrates
  • Lipids
  • Proteins
  • Nucleic Acids

  • 5. 
    Which of the following elements make up nucleic acids?

  • C, H, O
  • C, H, O, N
  • C, H, O, N, P
  • C, H, O, Ca, S

  • 6. 
    The function of a lipid is to...

  • Provide your body with energy.
  • Transmit genetic information.
  • Insulate your body and store energy.
  • Aid in almost every function of the human body.

  • 7. 
    _______ dictates the function of a protein

  • Shape
  • Temperature
  • pH
  • Time

  • 8. 
    Which macromolecule is made of simple and complex sugars?

  • lipids
  • proteins
  • carbohydrates
  • nucleic acids

  • 9. 
    What is the polymer of a nucleic acid?

  • DNA
  • Amino acid
  • Triglyceride
  • RNA
  • Both DNA and RNA

  • 10. 
    Glucose is an example of which monomer?

  • Nucleotide
  • Amino Acid
  • Simple Sugar

  • 11. 
    What is a long chain of sugars connected called?

  • monosaccharide
  • disaccharide
  • polysaccharide
  • polypeptide

  • 12. 
    Water is classified as an inorganic compound because it

  • does not contain carbon
  • does not contain nitrogen
  • contains hydrogen
  • contains oxygen

  • 13. 
    How do photosynthesis and cellular respiration differ?

  • Photosynthesis uses food and cellular respiration produces food.
  • Photosynthesis uses oxygen and cellular respiration uses carbon dioxide.
  • Photosynthesis breaks down carbohydrates and cellular respiration produces carbohydrates.
  • Photosynthesis gives off oxygen and cellular respiration uses oxygen.

  • 14. 
    Letter C...

  • active site
  • enzymes
  • substrate
  • products

  • 15. 
    A substrate attaches to an enzyme at the

  • product
  • sugar
  • attachment site
  • active site

  • 16. 
    Why can water have no net charge but have slight charges in different parts of the molecule?

  • The oxygen end is slightly negative and the hydrogen end is slightly positive.
  • The hydrogen end is slightly negative and the oxygen end is slightly positive.
  • The hydrogen and oxygen ends change in polarity.
  • Because it is hydrophobic.

  • 17. 
    All organic compounds contain the element

  • carbon
  • nitrogen
  • phosphorus
  • sulfur

  • 18. 
    What happens when enzymes are heated to a high temperature?

  • The enzymes die.
  • The shapes of the enzyme are altered or denatured
  • The enzymes' amino acid sequence changes.
  • The enzymes remain the same

  • 19. 
    DNA is a polymer formed from

  • fatty acids.
  • monosaccharides.
  • amino acids.
  • nucleotides.

  • 20. 
    Which elements make up a protein?

  • Carbon and Hydrogen
  • Carbon, Hydrogen, Oxygen
  • Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous
  • Carbon, Hydrogen, Oxygen, Nitrogen, sometimes Sulfur

  • 21. 
    How many different amino acids are there?

  • 4
  • 20
  • 6
  • 46

  • 22. 
    Which of the following is an organic compound?

  • H2O
  • C6H12O6
  • NH2
  • OH

  • 23. 
    What word describes when water is attracted to other substances?

  • cohesion
  • adhesion
  • capillary action
  • surface tension
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