Biochemistry Module 1

61 Questions | Total Attempts: 34

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Biochemistry Quizzes & Trivia

Questions and Answers
  • 1. 
    The synthesis of urea from ammonium cyanate
    • A. 

      Was a critical component of the miller Urey experiment

    • B. 

      Requires a protein as a catalyst

    • C. 

      Helped dispel the vital force theory

    • D. 

      Supported the vital force theory

  • 2. 
    Functional groups are
    • A. 

      Mathematical concepts applied to the topology of molecules

    • B. 

      Labaratory teams in industrial labaratories

    • C. 

      Sets of atoms that act in concert in chemical reactions

    • D. 

      None of the above

  • 3. 
    The following functional groups are very characterisitc of biomolecules, except
    • A. 

      Alkyl halides

    • B. 

      Amides

    • C. 

      Carboxylic acids

    • D. 

      Ethers

    • E. 

      Phosphate esters

  • 4. 
    Allo of the following statements are true of biomolecules except
    • A. 

      They contain predominantly ionic bonds

    • B. 

      They contain predominantly nonmetallic elements

    • C. 

      Carbon is the key element

    • D. 

      Specific stereoisomers are essential in most cases

    • E. 

      All of these characterize biomolecules

  • 5. 
    All of the following bonds are important in biomolecules except,
    • A. 

      C-CL

    • B. 

      C-H

    • C. 

      C-N

    • D. 

      O-H

    • E. 

      O-P

  • 6. 
    Polymers are important in living organisms for all of these reasons except:
    • A. 

      Different sequences of the monomers can lead to different functions

    • B. 

      Insoluble polymers can be created from soluble monomers

    • C. 

      A wide, almost unacountable variety of polymers can be created from just a few monomers

    • D. 

      Different linkages between the monomers can lead to different functions

    • E. 

      All of these are reasons polymers are important

  • 7. 
    Which statement is not correct about polymers?
    • A. 

      Polypeptides are composed of amino acids by amide bonds

    • B. 

      RNA is composed of ribonucleotides linked by phosphodiester bonds

    • C. 

      Starches and cellulose are composed of sugars linked by glycoside bonds

    • D. 

      Lipids are composed of glycerol and fatty acids linked by ester bonds

    • E. 

      All of these statements apply to polymers

  • 8. 
    In terms of the number of atoms, which element is the most common in the universe?
    • A. 

      C

    • B. 

      H

    • C. 

      He

    • D. 

      N

    • E. 

      O

  • 9. 
    In terms of the number of atoms, which element is the most common in living organisms?
    • A. 

      C

    • B. 

      Ca

    • C. 

      H

    • D. 

      N

    • E. 

      O

  • 10. 
    In terms of total mass, which element is the most common in living organisms?
    • A. 

      C

    • B. 

      Ca

    • C. 

      H

    • D. 

      N

    • E. 

      O

  • 11. 
    A polymer is
    • A. 

      a very large molecule that consist of one, and only one, kind of monomer

    • B. 

      A nonspecific aggregate of small molecule

    • C. 

      A macromolecules formed by linking smaller units called monomers

    • D. 

      A mixture of amino acids

  • 12. 
    Match the macromolecues with the monomeric unit in each
    • A. 

      Amino Acid; Proteins

    • B. 

      Monosaccharide;Carbohydrate

    • C. 

      Nucleotide;nucleic acids

  • 13. 
    A catalyst
    • A. 

      Increases the rate of a chemical reaction

    • B. 

      Increase the amount of product obtained in a chemical reaction

    • C. 

      Decreases the maount of product in a chemical reactiion

    • D. 

      None of the above

  • 14. 
    The genetic coding material is
    • A. 

      Protein

    • B. 

      DNA

    • C. 

      Polysaccharide

    • D. 

      Lipid

  • 15. 
    Biological catalyst are
    • A. 

      Proteins exclusively

    • B. 

      RNA exclusively

    • C. 

      DNA exclusively

    • D. 

      Some proteins and some RNA

  • 16. 
    It is generally believed that the following gas was missing in the primordial atmosphere:
    • A. 

      H2

    • B. 

      CO2

    • C. 

      CH4

    • D. 

      NH3

    • E. 

      O2

  • 17. 
    The following cellular component is foiund in all living organisms
    • A. 

      Nucleus

    • B. 

      Ribosomes

    • C. 

      Chloroplasts

    • D. 

      Mitochondria

    • E. 

      Cell walls

  • 18. 
    All of the following features are common to all living organisms except
    • A. 

      Biomolecules

    • B. 

      Metabolic pathways

    • C. 

      Cellular structures

    • D. 

      DNA sequences

    • E. 

      RNA molecules

  • 19. 
    All eukaryotic organisms are multicellular
    • A. 

      True

    • B. 

      False

  • 20. 
    Cell Membranes
    • A. 

      Are found in plants, but not in animals

    • B. 

      Consist mainly of sugars

    • C. 

      Do not allow transport into or out of the cell

    • D. 

      Seperate the cell from the outside world

  • 21. 
    All prokaryotic organisms are multicellular
    • A. 

      True

    • B. 

      False

  • 22. 
    Prokaryotic cells
    • A. 

      Do not have a well defined nucleus

    • B. 

      Are smaller than eukaryotic cells

    • C. 

      Do not have internal membranes

    • D. 

      All of the above

  • 23. 
    Prokaryotes
    • A. 

      Contain ribosomes

    • B. 

      Do not have a cell membrane

    • C. 

      Contain mitochondria

    • D. 

      None of the above

  • 24. 
    Ribosomes
    • A. 

      Are the site of photosynthesis

    • B. 

      Are the site of protein synthesis

    • C. 

      Are never bound to membranes

    • D. 

      Cannto be seen in the electron microscope

  • 25. 
    Ribosomes are made up of
    • A. 

      RNA and proteins

    • B. 

      DNA and Proteins

    • C. 

      RNA and DNA

    • D. 

      Proteins and carbohydrates

  • 26. 
    The following cellular component is characteristic of bacteria
    • A. 

      Nucleus

    • B. 

      Ribosomes

    • C. 

      Chloroplast

    • D. 

      Mitochondria

    • E. 

      More than one of these is characteristic of bacteria

  • 27. 
    Which Organelle is not a site for protein synthesis?
    • A. 

      Nucleus

    • B. 

      Mitochondrion

    • C. 

      Rough endoplasmic Reticulum

    • D. 

      Cytoplasm

    • E. 

      Recent evident indicates that all of these organelles can synthesize proteins

  • 28. 
    Which Organelle does not Contain DNA?
    • A. 

      Nucleus

    • B. 

      Mitochondrion

    • C. 

      Rough Endoplasmic Reticulum

    • D. 

      Chloroplasts

    • E. 

      All of these organelles contain DNA

  • 29. 
    Which organelle does not have a double membrane?
    • A. 

      Nucleus

    • B. 

      Lysosome

    • C. 

      Rough Endoplasmic Reticulum

    • D. 

      Chloroplast

    • E. 

      Mitochondrion

  • 30. 
    Which organelle is able to capture the energy of light?
    • A. 

      Nucleus

    • B. 

      Lysosome

    • C. 

      Rough ebdolasmic reticulum

    • D. 

      Chloroplast

    • E. 

      Mitochondrion

  • 31. 
    Which Organelle is involved in the synthesis of ATP?
    • A. 

      Nucleus

    • B. 

      Mitochondrion

    • C. 

      ATP is synthesized in both mitochondrion and chloroplast

    • D. 

      ATP is synthesized in all three organelles

  • 32. 
    Which organelle contains hydrolytic enzymes?
    • A. 

      Nucleus

    • B. 

      Lysosomes

    • C. 

      Rough endplasmic reticulum

    • D. 

      Chloroplasts

    • E. 

      Mitochondrion

  • 33. 
    Eukaryotic DNA
    • A. 

      Is found in the nucleus

    • B. 

      Is found in the mitochondrion

    • C. 

      Is found in the chloroplast

    • D. 

      All of the above

  • 34. 
    The hydrolysis of ATP involves release of energy
    • A. 

      TRUE

    • B. 

      False

  • 35. 
    • A. 

      Because of their polar nature

    • B. 

      Because that is the way it is.

  • 36. 
    • A. 

      Able to form 4 hydrogen bonds

    • B. 

      Hydrogen bonding makes it have a higher BP and MP

    • C. 

      It is a very good solvent and is able to make non-specific dipole to dipole interactions

    • D. 

      All of the above

  • 37. 
    • A. 

      Proton accepting molecules

    • B. 

      Proton donating molecules

    • C. 

      -log of proton concentration

    • D. 

      -log of hydroxide ion concentration

    • E. 

      All of the above

  • 38. 
    • A. 

      Experiment in which measured amount of base or acid is added

    • B. 

      Measurement that includes the determination of Pka

    • C. 

      Measurement used to determine the equivalence point

    • D. 

      Measurement used to determine inflection point at which the Ph hardly changes

    • E. 

      All of the above

  • 39. 
    • A. 

      Find a suitable pka for the buffer

    • B. 

      Make sure no side reactions will occur

    • C. 

      Use a weak acid or a weak base in sufficient amounts to make sure they will not completely dissociate

    • D. 

      All of the above

  • 40. 
    • A. 

      By adding a weak acid or a weak base it guarantees there will be a buffer.

    • B. 

      This is because if you add an acid to buffer it will react with th cojugate base to make a weak acid

    • C. 

      If you add a hydroxide ion it will react with the weak acid to form water

    • D. 

      Either way the H+ or OH- is used up when adding it to the buffer

    • E. 

      All if the above

  • 41. 
    Many of the properties of water can be accounted for by the fact that
    • A. 

      It is polar

    • B. 

      If forms hydrogen bonds

    • C. 

      It is a bent molecule

    • D. 

      All of the above

  • 42. 
    Which element is most electronegative?
    • A. 

      C

    • B. 

      H

    • C. 

      N

    • D. 

      O

    • E. 

      P

  • 43. 
    The water molecule is polar because:
    • A. 

      Electrons are not distributed symmetrically in the molecule

    • B. 

      The hydrogen atoms are found on one side of the molecule

    • C. 

      Hydrogen is less electronegative than oxygen the hydrogen atoms are founf on one side of the molecule and hydrogen is less electronegative than oxygen

    • D. 

      All of the above

  • 44. 
    The amphipathic molecule in the list below is
    • A. 

      Sodium chloride

    • B. 

      Acetic acid

    • C. 

      Benzene

    • D. 

      Palmitic acid

  • 45. 
    Which of the following classes of compound is hydrophilic?
    • A. 

      Sugars

    • B. 

      Fatty acids

    • C. 

      Amino acids

    • D. 

      Sugars and amino acids

    • E. 

      All of these

  • 46. 
    Which of the common solvents is the most polar?
    • A. 

      Acetone

    • B. 

      Alcohol

    • C. 

      Benzene

    • D. 

      Hexane

    • E. 

      Water

  • 47. 
    Which of the following classes of compounds is hydrophobic?
    • A. 

      Table salt

    • B. 

      Cholestrol

    • C. 

      Phophate esters

    • D. 

      Cholestrol and phosphate esters

    • E. 

      All of these are hydrophobic

  • 48. 
    A micelle is a structure which:
    • A. 

      Aggregates with ithe molecules in water

    • B. 

      Has its polar groups on the outside and non-polar groups on the inside when in water.

    • C. 

      Explains how soaps and detergents work

    • D. 

      All of these describe micelles

  • 49. 
    Hydrigen Bonds
    • A. 

      Play an important role in the solvent properties of water

    • B. 

      Are not involved in protein structure

    • C. 

      Play a role in the properties of DNA, but not RNA

    • D. 

      Give water a lower BP than expected

  • 50. 
    Which of the following molecules will not forma hydrogen bonds?
    • A. 

      CH4

    • B. 

      NH3

    • C. 

      H20

    • D. 

      HF

  • 51. 
    A single water molecule can form a maximum if this number of hydrogen bonds:
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

    • E. 

      5

  • 52. 
    The acid dissociation constant is the equillibrium constant for the reaction of an acid in water
    • A. 

      True

    • B. 

      False

  • 53. 
    Water can act as both an acid and a base in aqueous acid/base reactions
    • A. 

      True

    • B. 

      False

  • 54. 
    A weak acid only partially dissociates in water.
    • A. 

      True

    • B. 

      False

  • 55. 
    Bases remove protons from solution
    • A. 

      True

    • B. 

      False

  • 56. 
    The quantiity Ka is
    • A. 

      Invariant with temperature

    • B. 

      Related to molecular weight of hydrocarbons

    • C. 

      A measure of the strength of an acid

    • D. 

      All of the above

  • 57. 
    A buffer solution at ph10 has a ration of HA/A-. What is the pka of the acid?
    • A. 

      1

    • B. 

      5

    • C. 

      8

    • D. 

      9

  • 58. 
    The main intracellular buffer system is H2PO4-?/HPO4-
    • A. 

      H2PO4-/HPO4-

    • B. 

      H3PO4/H2PO4-

  • 59. 
    Which Came first the catalyst or the hereditary molecules?
    • A. 

      Both thru RNA because RNA acts as both the heriditary and a catalyst molecule.

    • B. 

      False

  • 60. 
    • A. 

      Photosynthesis

    • B. 

      Spontaneous

    • C. 

      Chemical energy to electric energy

    • D. 

      All of the above

  • 61. 
    • A. 

      Nucleusm, Mitochondrion, chloroplasts.

    • B. 

      False