Quiz  /  Proteins Class 9 MCQ Questions With Answers

  • 1. 
    Proteins are made of

  • CHO
  • CHON
  • CHONP`
  • CHONS

  • 2. 
    While speaking to a colleague, a scientist makes the following statement: "I propose that Bald Eagle eggs in northern Maine will have thinner shells than those from birds in southern Alaska due to increased levels of pesticides in the water." This statement is a

  • theory
  • law
  • conclusion
  • hypothesis

  • 3. 
    Which colored box highlights the amino group?

  • Blue (left)
  • Turquoise (top)
  • Orange
  • Red
  • Purple

  • 4. 
    What is the name for a chain of amino acids?

  • Polypeptide chain
  • Triglycerides
  • Polysaccharides
  • Nucleotides

  • 5. 
    Each amino acid is different from the other due to....

  • The R group
  • The amino group
  • The carboxyl group
  • The central carbon

  • 6. 
    Which of the following are functional proteins?

  • antibodies
  • amylase
  • insulin
  • All of above

  • 7. 
    What is the name of the bond that joins two amino acids together?

  • Ester bond
  • Glycosidic bond
  • Peptide bond
  • Nucleic bond

  • 8. 
    Which reaction is needed to bond two amino acids together?

  • Dehydration
  • Dehydrogenation
  • Hydration
  • Hydrolysis

  • 9. 
    Given the graph below, which statement best describes the role of enzymes?

  • More energy is released without the presence of enzymes
  • Less energy is needed to start a reaction when enzymes are present.
  • A reaction is catalyzed by the lack of enzymes
  • The presence of enzymes causes reactions to occur at a slower rate.

  • 10. 
    What structural protein makes up hair, nails, skin, feathers, beaks, hooves, horns and fur?

  • elastin
  • collagen
  • keratin
  • hemoglobin

  • 11. 
    Which level of protein structure is only found in proteins with more than one polypeptide chain?

  • Primary
  • Secondary
  • Tertiary
  • Quaternary

  • 12. 
    Which colored box highlights the carboxyl group?

  • Blue (left)
  • Turquoise (top)
  • Orange
  • Red
  • Purple

  • 13. 
    Amino acids that must be supplied by foods in the diet

  • essential amino acid
  • complete protein
  • emulsion
  • collagen

  • 14. 
    Structural proteins

  • form structures needed in the body
  • are enzymes
  • are fats
  • are not needed for humans to live

  • 15. 
    DNA and RNA are what type of macromolecule?

  • lipids
  • nucleic acids
  • carbohydrates
  • enzymes

  • 16. 
    All proteins

  • have a unique structure that determines their unique function.
  • are exactly the same in function but different in structure.
  • are exactly the same in structure but different in function.
  • are enzymes.

  • 17. 
    Which protein structure is only found in proteins with more than one polypeptide chain?

  • Primary
  • Secondary
  • Tertiary
  • Quaternary

  • 18. 
    The polymer which folds into proteins

  • Polypeptide
  • Amino Acids
  • Nucleic Acids
  • Polynucleotides

  • 19. 
    Cells must produce many different enzymes because

  • enzymes are quickly used up
  • most cellular reactions require a specific, unique enzyme
  • They have to have some way to use up the protein that they consume
  • enzymes are not very effective at speeding up reactions

  • 20. 
    What is an example of a protein?

  • Strawberries
  • Bread
  • Pasta
  • Steak

  • 21. 
    Enzymes belong to which category of organic molecule?

  • Proteins
  • Lipids
  • Carbohydrates
  • Nucleic acids

  • 22. 
    Which colored box is the reason this is an organic molecule?

  • Blue (left)
  • Turquoise (top)
  • Orange
  • Red
  • Purple

  • 23. 
    Antibodies protect the body from pathogens. What type of proteins are they considered?

  • Transport
  • Signaling
  • Defense
  • Contractile

  • 24. 
    Two amino acids will bond together as the result of _______.

  • Dehydration synthesis
  • Hydrolysis
  • pHolysis
  • Rehydration synthesis

  • 25. 
    Collagen and keratin are examples of what type of protein?

  • Fibrous
  • Globular
  • Multifunctional
  • Digestive enzymes

  • 26. 
    Which level of protein structure describes a protein's three-dimensional shape?

  • Primary
  • Secondary
  • Tertiary
  • Quaternary
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