Biology 101 (Chapter 4 - Chapter 5) First Exam

42 Questions | Total Attempts: 259

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Biology 101 (Chapter 4 - Chapter 5) First Exam

Welcome To Biology 101 Exam Be careful and focus The exam is easy :) GooD Luck 


Questions and Answers
  • 1. 
    All of these are true about " electron configuration" EXCEPT:
    • A. 

      It determines the kind of bonds that an atom will form with other atoms

    • B. 

      It determines the number of bonds that an atom will form with other atoms

    • C. 

      It's the key to an atom's chemical characteristics

    • D. 

      It determines the number of valence electrons

    • E. 

      None of the above

  • 2. 
    One of these is not true about an Carbon atom:
    • A. 

      It has 4 valance electrons

    • B. 

      It has 6 electrons

    • C. 

      It can bound to another carbon atom

    • D. 

      It forms hydrogen bounds by sharing it's 4 electrons

    • E. 

      Two of the above

  • 3. 
    When a Carbon forms 4 single bounds the arrangement of these bounds will be:
    • A. 

      At the same plane

    • B. 

      Tetrahedral shape with 109.5 bond angles

    • C. 

      Tetrahedral shape with 105.9 bond angles

    • D. 

      Two of the above

    • E. 

      None of the above

  • 4. 
    One of theses isn't a frequent bonding partner of Carbon:
    • A. 

      Hydrogen

    • B. 

      Sulfur

    • C. 

      Nitrogen

    • D. 

      Oxygen

    • E. 

      Two of the above

  • 5. 
    Carbon dioxide is often considered inorganic because: 
    • A. 

      It's a very simple molecule

    • B. 

      It lacks nitrogen

    • C. 

      It lacks hydrogen

    • D. 

      It doesn't have single bonds

    • E. 

      Two of the above

  • 6. 
    Carbon can make organic compounds that vary in:
    • A. 

      Length of carbon chains

    • B. 

      Shape

    • C. 

      Number of double bonds

    • D. 

      Location of double bonds

    • E. 

      All of the above

  • 7. 
    Carbon chains Could have all of these forms(shapes) except:
    • A. 

      Open(straight) chain

    • B. 

      Ring chain

    • C. 

      Random chain

    • D. 

      Branched chain

    • E. 

      None of the above

  • 8. 
    The major components of petroleum are:
    • A. 

      Enantiomers

    • B. 

      Hydrocarbons

    • C. 

      Amino acids

    • D. 

      None of the above

  • 9. 
    All of these are characteristics of hydrocarbons(such as fats and gasoline) except:
    • A. 

      Dissolve in water

    • B. 

      Hydrophobic compounds (because the great majority of their bonds are nonpolar carbon to hydrogen linkages)

    • C. 

      Can undergo reactions that release a relatively large amount of energy

    • D. 

      Two of the above

    • E. 

      None of the above

  • 10. 
    Compounds that have the same numbers of atoms of the same elements (same molecular formula) but different structures , is the definition of:
    • A. 

      Structural isomers

    • B. 

      Cis-trans isomers

    • C. 

      Enantiomers

    • D. 

      All of the above

  • 11. 
    The two compounds in that figure are related as:
    • A. 

      Geometric isomers

    • B. 

      Strucural isomers

    • C. 

      Enantiomers

    • D. 

      None of the above

  • 12. 
    One of these statements is TRUE about that figure: 
    • A. 

      It can make cis-trans isomers

    • B. 

      It can make structural isomers

    • C. 

      It can make enantiomers and asymmetric carbons are (b&c)

    • D. 

      It can make enantiomers and asymmetric carbon is (b)

    • E. 

      Two of the above

  • 13. 
    Organic compounds with a sulfhydryl group are known as:
    • A. 

      Alcohols

    • B. 

      Organic acids

    • C. 

      Amines

    • D. 

      Thiols

    • E. 

      Sulfylated compounds

  • 14. 
    One of these statements is false about "Acetone":
    • A. 

      Structural isomer with Propanal

    • B. 

      Simplest ketone

    • C. 

      Has a carboxyl group within the carbon skeleton

    • D. 

      Consist of 3 carbons

    • E. 

      None of the above

  • 15. 
    • A. 

      Charged by (-1) in ionized form

    • B. 

      Acts as an acid

    • C. 

      Can pick up H+ from the water in living organisms

    • D. 

      Includes nitrogen atom

    • E. 

      Two of the above

  • 16. 
    If a polymer with 741 monomers is broken by hydrolysis , this will give us :
    • A. 

      740 monomers

    • B. 

      740 water molecules

    • C. 

      741 water molecules

    • D. 

      None of the above

  • 17. 
    Carbohydrates macromolecules are:
    • A. 

      Polymers called disaccharides composed of many monosaccharides joined by covalent bonds

    • B. 

      Polymers called polysaccharides composed of many monosaccharides joined by hydrogen bonds

    • C. 

      Polymers called polysaccharides composed of many monosaccharides joined by glycosidic linkages

    • D. 

      None of the above

  • 18. 
    The one true about relation between Glucose and Fructose is:
    • A. 

      Both are aldoses

    • B. 

      Structural isomers

    • C. 

      They differ in molecular formula

    • D. 

      Both are hexoses

    • E. 

      Two of the above

  • 19. 
    One of these is an example of a disaccharides:
    • A. 

      Starch

    • B. 

      Amylose

    • C. 

      Galactose

    • D. 

      Lactose

  • 20. 
    Starch is found in planet cells in a structures called "plastids"
    • A. 

      True

    • B. 

      False

  • 21. 
    The best describes the relation between amylose and amylopectin is:
    • A. 

      Both are synthesized in animal cells

    • B. 

      Both are branched

    • C. 

      Both have 1-4 glycosidic linkages and 1-6 glycosidic linkages

    • D. 

      Potato tubers and grains are the major sources of them

    • E. 

      Two of the above

  • 22. 
    Starch and cellulose differ in:
    • A. 

      Function

    • B. 

      Glycosidic linkages

    • C. 

      Three-dimensional shape

    • D. 

      Two of the above

    • E. 

      All of the above

  • 23. 
    β glucose mean that OH group attached to second carbon are above the plane of the glucose ring
    • A. 

      True

    • B. 

      False

  • 24. 
    Cow harbors can digest cellulose by it's enzymes 
    • A. 

      True

    • B. 

      False

  • 25. 
    "insoluble fiber" refers mainly to:
    • A. 

      Chitin

    • B. 

      Cytoskeleton

    • C. 

      Cellulose

    • D. 

      None of the above

  • 26. 
    One of these is wrong about fats:
    • A. 

      They are hydrophobic

    • B. 

      Also called triacylglycerol

    • C. 

      Are macromolecules

    • D. 

      Have two types saturated and unstaturated

    • E. 

      In making fat , three fatty acids are each joined to glycerol

  • 27. 
    Saturated fats have cis double bonds
    • A. 

      True

    • B. 

      False

  • 28. 
    • A. 

      Antiparallel

    • B. 

      Bilayer

    • C. 

      α-helix

    • D. 

      None of the above

  • 29. 
    One of these isn't an example of Steroids:
    • A. 

      Cholesterol

    • B. 

      Estradiol

    • C. 

      Testosterone

    • D. 

      Atherosclerosis

  • 30. 
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

  • 31. 
    Ovalbumin is an example of:
    • A. 

      Transport proteins

    • B. 

      Amino Acids

    • C. 

      Storage proteins

    • D. 

      Contractile proteins

  • 32. 
    The only amino acid that it's α carbon isn't an asymmetric carbon
    • A. 

      Alanine

    • B. 

      Glycine

    • C. 

      Cysteine

    • D. 

      Lysine

  • 33. 
    How many different types of polypeptides ,each composed of 110 amino acids, could be synthesized using 20 common amino acids
    • A. 

      110^(20)

    • B. 

      20^(110)

    • C. 

      20

    • D. 

      110×20

  • 34. 
    • A. 

      Peptide bonds

    • B. 

      Hydrogen bonds

    • C. 

      disulfide bonds

    • D. 

      Phosphodiester bonds

    • E. 

      A, B, and C

  • 35. 
    Which type of interaction stabilizes the alpha (α) helix and the beta (β) pleated sheet structures of proteins?
    • A. 

      Hydrogen bonds

    • B. 

      Hydrophobic interactions

    • C. 

      Nonpolar covalent bonds

    • D. 

      Ionic bonds

  • 36. 
    The function of each protein is a consequence of its specific shape. What is the term used for a change in a protein's three-dimensional shape or conformation due to disruption of hydrogen bonds, disulfide bridges, or ionic bonds?
    • A. 

      Hydrolysis

    • B. 

      Stabilization

    • C. 

      Denaturation

    • D. 

      Dehydration

  • 37. 
    • A. 

      The 5' end has a hydroxyl group attached to the number 5 carbon of pentose.

    • B. 

      The 5' end has a phosphate group attached to the number 5 carbon of pentose.

    • C. 

      The 5' end has thymine attached to the number 5 carbon of pentose.

    • D. 

      The 5' end has a carboxyl group attached to the number 5 carbon of pentose.

    • E. 

      The 5' end is the fifth position on one of the nitrogenous bases.

  • 38. 
    If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?
    • A. 

      10%

    • B. 

      25%

    • C. 

      40%

    • D. 

      Impossible to tell from the information given

  • 39. 
    If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other
    • A. 

      5'TAACGT3'

    • B. 

      3'TAACGT5'.

    • C. 

      5'UAACGU3'

    • D. 

      3'UAACGU5'.

  • 40. 
    The molecular formula for glucose is C6H12O6. What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration reactions?
    • A. 

      C60H111O51

    • B. 

      C60H120O60

    • C. 

      C60H100O50

    • D. 

      C60H102O51

  • 41. 
    The structural level of a protein least affected by a disruption in hydrogen bonding is the
    • A. 

      Primary level

    • B. 

      Secondary level

    • C. 

      Tertiary level

    • D. 

      Quaternary level.

    • E. 

      All structural levelsare equally affected.

  • 42. 
    • A. 

      It is a saturated fatty acid.

    • B. 

      A diet rich in this molecule may contribute to atherosclerosis

    • C. 

      Molecules of this type are usually liquid at room temperature

    • D. 

      A and B

    • E. 

      A, B and C