Quiz  /  Biochemistry Class 9 MCQ Questions With Answers

  • 1. 
    Which biomolecule contains Deoxyribonucleic acid; a sequence of bases that makes hereditary code; Ribonucleic acid; ­translate hereditary code into proteins that determine how the cell will function under various conditions; provides storage and retrieval of information­; encode genes, gene expression, helps make proteins

  • Nucleic Acid
  • Lipid
  • Carbohydrate
  • Protein

  • 2. 
    Which elements isn't in all the biomolecules?

  • hydrogen
  • nitrogen
  • oxygen
  • carbon

  • 3. 
    What is a substance called if it speeds up a chemical reaction?

  • reusable
  • catalyst
  • specific
  • fragile

  • 4. 
    What is the bond called between two metals?

  • Ionic bonding
  • Covalent bonding
  • Hydrogen bonding
  • Atomic bonding

  • 5. 
    A carbohydrate is made up of all of the following elements except for...

  • Carbon
  • Nitrogen
  • Hydrogen
  • Oxygen

  • 6. 
    Which does not occur in dehydration synthesis?

  • water is formed
  • a polymer is produced
  • a polymer is broken down
  • monomers are covalently bonded together

  • 7. 
    Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

  • reducing the number of products
  • reducing the activation energy
  • increasing the temperature of the cell
  • increasing the concentration of reactants

  • 8. 
    What property of water helps to moderate earth's temperature?

  • adhesion
  • chohesion
  • Specific heat capacity
  • Latent heat of vaporization

  • 9. 
    In animals, glycogen is stored in ___.

  • liver
  • muscles
  • liver & muscles
  • none are correct

  • 10. 
    Which is NOT a unique property of water?

  • Frozen water floats on liquid water.
  • Water covers most of the Earth’s surface and retains a large amount of heat.
  • Water molecules stick to each other through hydrogen bonds.
  • Water cools very rapidly.

  • 11. 
    Which of the following binds to the active site of an enzyme?

  • substrate
  • product
  • codon
  • none of the above

  • 12. 
    __________ are nucleic acid functions

  • store & transfer genetic info
  • store & create energy
  • structure & energy for cells
  • membrane structure and nutrient transfer

  • 13. 
    How many atoms are there TOTAL in:H2SO4

  • 6
  • 5
  • 7
  • 3

  • 14. 
    Enzymes are

  • nucleic acids
  • proteins
  • lipids
  • carbohydrates

  • 15. 
    Temperature and pH can upset the folding of proteins leading a loss of the active site. The enzyme no longer functions correctly. What term describes this loss of function?

  • Optimization
  • Denaturation
  • Hydrolysis
  • Synthesis

  • 16. 
    Complex carbs are made of many _______

  • proteins
  • starch molecules
  • fatty acids
  • glucose molecules

  • 17. 
    Which is not a particle in an atom?

  • electron
  • megatron
  • proton
  • neutron

  • 18. 
    How do polar molecules differ from non-polar molecules?

  • Non-polar molecules are hydrophilic while polar compounds are hydrophobic.
  • Polar molecules have an uneven distribution of electrical charge where as non-polar molecules have an near even distribution of electrical charge.
  • Polar molecules have a tendency to have carbon and hydrogen only in their structures.
  • Non-polar molecules can dissolve in water while polar molecules can dissolve in oil.
Report Question
warning
access_time
  Time