Worksheet: Biological Molecules

In this worksheet, we will practice describing the structures and functions of biological molecules, such as DNA, proteins, carbohydrates, and fats.

Q1:

Which of the following diagrams represents a macromolecule of protein comprised of two different monomers?

  • A
    COCOCOCOCO
  • B
    OCOOCOOCOOCOOCO
  • C
    NHCONHCNOHCNOHCNOHCO
  • D
    OCOOCOOCOOCOOCO
  • E
    NHCONHCONHCNOHCNOHCO

Q2:

Which of the following chemicals contains the same linkages found in proteins?

  • APolyethene
  • BPolyester
  • CStarch
  • DNylon
  • ETerylene

Q3:

Which analytical technique can identify and separate mixtures of amino acids?

  • ADistillation
  • BFiltration
  • CEvaporation
  • DDecanting
  • EChromatography

Q4:

A section of a molecule of starch is shown in the diagram. Starch can be hydrolyzed to glucose using dilute sulfuric acid. Which diagram represents glucose?

OOOOO
  • A
  • B
    HOH
  • C
    HOOH
  • D
    OO
  • E
    HH

Q5:

Which combination of elements makes up the linkages in protein molecules?

  • ANitrogen, sulfur, and hydrogen
  • BOxygen, hydrogen, and carbon
  • CNitrogen, hydrogen, carbon, and sulfur
  • DNitrogen, oxygen, hydrogen, and carbon
  • ENitrogen, oxygen, and carbon

Q6:

Which of the following biomolecules are capable of hydrolyzing carbohydrates and proteins?

  • ARed blood cells
  • BCytokines
  • CSugars
  • DDNA
  • EEnzymes

Q7:

What do amino acids form when they are polymerized?

  • ADNA
  • BCarbohydrates
  • CFats
  • DProteins
  • ESugars

Q8:

What is the name of the monomers that combine to become macromolecules of DNA?

  • ASugars
  • BPhosphates
  • CFatty acids
  • DNucleotides
  • EAmino acids

Q9:

What is the chemical process that can break carbohydrates down into simple sugars?

  • APolymerization
  • BDissolution
  • CCombustion
  • DHeating
  • EHydrolysis

Q10:

Fill in the blank: One way Terylene and nylon are different from proteins and carbohydrates found in the body is that they are both .

  • Along-chain organic compounds
  • Bsynthetic
  • Cused for energy by the body
  • Dnaturally occurring
  • Efound in foodstuff

Q11:

What are the three main food groups?

  • ACarbohydrate, protein, and fiber
  • BFat, fiber, and protein
  • CFat, carbohydrate, and water
  • DFiber, carbohydrate, and protein
  • EFat, carbohydrate, and protein

Q12:

Which type of chemical compound are fats?

  • ACarboxylic acids
  • BAlkanes
  • CAlcohols
  • DEsters
  • EAmides

Q13:

What type of biomolecule reacts with glycerol to form lipids?

  • ANucleotides
  • BFatty acids
  • CProteins
  • DSugars
  • EAmino acids

Q14:

What type of molecules are proteins and carbohydrates examples of?

  • AHydrocarbons
  • BPolymers
  • CCarbonyls
  • DAlcohols
  • EMonomers

Q15:

Fill in the blank: Enzymes are a type of .

  • Acarbohydrate
  • Bfat
  • Csugar
  • Damino acid
  • Eprotein

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