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BIOL | 1001 |Exam | 1 |Kessler |exam |with |correct |
answers
How |can |you |differentiate |between |atomic |number |and |mass |number |of |an |atom? a) |Atomic |number |is |the |number |of |protons |while |mass |number |is |the |number |of |protons |+ |electrons b) |Atomic |number |is |the |number |of |protons |while |mass |number |is |the |number |of |protons |+ |neutrons c) |Atomic |number |is |the |number |of |protons |while |mass |number |is |the |number |of |neutrons |+ | electrons d) |Atomic |number |is |the |number |of |neutrons |while |mass |number |is |the |number |of |protons e) |Atomic |number |is |the |number |of |protons |while |mass |number |is |the |number |of |neutrons. |- |โโb) | Atomic |number |is |the |number |of |protons |while |mass |number |is |the |number |of |protons |+ |neutrons If |an |unknown |compound |is |made |up |of |carbons, |hydrogens, |and |oxygens |in |a |1:2:1 |ratio, |you | immediately |know |that |this |compound |is |a... a) |Protein b) |Carbohydrate c) |Lipid d) |Nucleic |Acid e) |More |than |one |of |these |- |โโb) |Carbohydrate A |covalent |bond |is |the |sharing |of |________ |between |atoms |while |an |ionic |bond |is |the |________. | a) |neutrons; |sharing |of |electrons b) |Electrons; |electric |attraction |between |two |atoms c) |Protons; |electric |attraction |between |two |atoms d) |Protons; |sharing |of |electrons e) |electrons; |transfer |of |electrons |from |one |atom |to |another |- |โโb) |Electrons; |electric |attraction | between |two |atoms
Which |of |the |following |compounds/bonds |is |a |direct |result |of |a |dehydration |reaction? a) |Disaccharide b) |Peptide |bond c) |Hydrogen |bond d) |More |than |one |the |above e) |All |of |the |above |- |โโd) |More |than |one |of |the |above What |happens |when |an |unsaturated |fat |is |fully |hydrogenated? a) |Hydrogen |is |added |to |the |fatty |acid |chain b) |The |melting |point |is |raised c) |The |fatty |acid |chain |is |straightened d) |A |and |C e) |All |of |the |above |- |โโe) |All |of |the |above |(Hydrogen |is |added |to |the |fatty |acid |chain, |the |melting | point |is |raised, |the |fatty |acid |chain |is |straightened) Irn- |Bru |is |a |popuular |soft |drink |in |Scotland. |Us |Scots |love |it, |but |many |others |just |don't |"get |it", | arguing |that |it |tastes |odd. |Compared |to |the |pH |of |Coke |(around |3.0), |Irn-Bru |tests |at |a |reasonable |pH |of |5.0. |So, |I'm |arguing |back |that |regardless |the |odd |taste, |Irn-Bru |is |healthier |for |teeth! |What |is |the | H+ |ion |concentration |difference |between |Irn-Bru |and |Coke? a) |Coke |has |100x |more |H+'s b) |Irn-Bru |has |100x |more |H+'s c) |Coke |has |1000x |more |H+'s | d) |Coke |has |200x |more |H+'s | e) |Irn-Bru |has |200x |more |H+'s |- |โโa) |Coke |has |100x |more |H+'s In |order |to |market |Irn-Bru |in |the |United |States, |you |want |to |conduct |a |controlled |experiment |to | prove |that |it |is |better |for |one's |teeth |than |Coke. |You |use |extracted |teeth |and |quantify |the |amount |of |enamel |erosion |in |a |24-hour |period. |You |then |conduct |a |statistical |test |to |determine |if |Irn-Bru | eroded |the |enamel |less |than |Coke. |What |would |the |null |hypothesis |be |in |this |particular |experiment? a) |Coke |will |cause |more |enamel |erosion |than |Irn-Bru.
Which |of |the |following |is |true |regarding |bond |strength? a) |Double |bonds |are |stronger |than |triple |bonds b) |Generally |speaking, |ionic |bonds |are |stronger |than |covalent |bonds c) |Van |der |Waals |interactions |are |one |of |the |weakest |types |of |bonds. | d) |More |than |one |of |the |above e) |All |of |the |above |- |โโc) |Van |der |Waals |interactions |are |one |of |the |weakest |types |of |bonds. Based |on |your |knowledge |of |the |polarity |of |water |molecules, |the |solute |molecule |in |the |center |of |the |figure |below |is |most |likely: a) |nonpolar b) |hydrophobic c) |uncharged d) |negatively |charged e) |positively |charged |- |โโe) |positively |charged Water |has |unusually |high |specific |heat. |This |is |directly |related |to |which |of |the |following? | a) |At |its |boiling |point, |water |changes |from |liquid |to |vapor b) |More |heat |is |required |to |raise |the |temperature |of |water c) |Ice |floats |in |liquid |water d) |Salt |water |freezes |at |a |lower |temperature |than |pure |water e) |Floating |ice |can |insulate |bodies |of |water |- |โโb) |More |heat |is |required |to |raise |the |temperature | of |water Suppose |you |synthesize |a |polypeptide |that |is | 10 |amino |acids |long, |Met-Phe-Try-Pro-Ser-Thr-Cys-Tyr- Asp-Glu, |in |the |lab. |Now |you |want |to |completely |hydrolyze |that |polypeptide |into |monomer |amino | acids. |How |many |water |molecules |are |needed |for |this |reaction? | a) | 0 b) | 8 c) | 9
d) | 10 e) |Not |enough |information |given |- |โโc) | 9 Which |of |the |following |fatty |acids |have |the |highest |melting |point? a) | 24 |carbon |chain |with |no |double |bonds b) | 26 |carbon |chain |with |one |double |bond c) | 22 |carbon |chain |with |no |double |bonds d) | 24 |carbon |chain |with |two |double |bonds e) | 26 |carbon |chain |with |two |double |bonds |- |โโa) | 24 |carbon |chain |with |no |double |bonds If |you |were |designing |a |molecule |to |be |highly |acidic, |which |functional |group |would |you |be |sure |to | include |in |the |sequence? a) |hydroxyl b) |amino c) |carboxyl d) |carbonyl e) |None |of |the |above |- |โโc) |carboxyl Using |the |amino |acids |labeled |above, |which |would |most |likely |be |found |on |the |inside |of |a |folded | protein? a) |A b) |B c) |C d) |D e) |More |than |one |of |these |- |โโa) |A While |working |with |an |individual |protein, |you |notice |a |problem |with |the |secondary |structure. |Which | of |the |above |amino |acids |would |likely |be |implicated |in |this |problem? a) |A
d) |C::G |T::A |- |โโa) |A::T |C::G Use |the |figure |above |to |answer |the |following |questions. | The |model |reveals |base-pairing |via |hydrogen |bonds. |If |each |hydrogen |bond |is |a |very |weak |bond, | which |of |the |following |statements |best |explains |how |the |double |helix |is |held |together? | a) |Phosphate |groups |(not |shown |in |this |cartoon) |are |negatively |charged, |so |they |partake |in |ionic | bonds |which |are |stronger |than |hydrogen |bonds. b) |Hydrogen |bonding |only |occurs |in |RNA, |which |is |why |DNA |is |the |genetic |molecule. c) |While |each |hydrogen |bond |is |weak, |there |are |billions |of |hydrogen |bonds |in |our |genome |and | collectively |they |are |very |strong. d) |The |strands |of |the |double |helix |are |held |together |by |covalent |bonds. e) |The |genome |is |broken |up |into |chromosomes |to |avoid |too |many |weak |hydrogen |bonds. |- |โโc) | While |each |hydrogen |bond |is |weak, |there |are |billions |of |hydrogen |bonds |in |our |genome |and | collectively |they |are |very |strong. If |water |forms |a |hydration |shell |over |a |substance |with |the |hydrogen |part |of |the |water |molecule | facing |toward |that |substance, |it |is |likely |that |substance |is... a) |Nonpolar b) |An |anion c) |Hydrophobic d) |A |solvent e) |A |cation |- |โโb) |An |anion The |function |of |a |protein |upon |the |shape |into |which |the |chain |of |amino |acids |folds. |Many | noncovalent |interactions |are |responsible |for |maintaining |the |protein's |shape. |Assume |you |have | isolated |a |protein |from |an |organism |in |its |proper |shape, |and |you |have |treated |it |with |an |enzyme |that |selectively |targets |and |breaks |only |the |peptide |bonds |in |the |proteins. |Would |the |protein |retain |its | shape |under |these |conditions? a) |Yes; |once |noncovalent |bonding |determines |the |shape |of |a |protein, |the |peptide |bonds |are |no | longer |necessary.
b) |Yes; |because |the |noncovalent |interactions |that |determine |the |shape |of |a |protein |are |stronger |than |the |peptide |bonds. | c) |No; |while |the |noncovalent |bonds |determine |the |shape |of |the |protein, |the |peptide |bonds |are | required |to |hold |the |amino |acids |together. | d) |Yes; |but |the |shape |would |be |affected |to |a |greater |extent |by |changes |in |temperature. |- |โโc) |No; | while |the |noncovalent |bonds |determine |the |shape |of |the |protein, |the |peptide |bonds |are |required |to | hold |the |amino |acids |together. Which |of |the |following |macromolecules |is |least |likely |to |be |used |for |energy? a) |Carbohydrates b) |Lipids c) |Proteins d) |Nucleic |Acids |- |โโd) |Nucleic |Acids You |want |to |study |the |Marquette |community |and |how |much |exercise |per |week |various |groups |of | people |get, |particularly |professors |vs. |students. |What |would |be |a |reasonable |control |group |for |this | study? a) |Students |at |Marquette b) |Professors |at |Marquette c) |Group |of |individuals |not |affiliated |with |Marquette d) |Students |at |Marquette |who |do |not |exercise e) |None |of |these |- |โโc) |Group |of |individuals |not |affiliated |with |Marquette In |that |same |study, |what |would |you |need |to |have |to |run |a |Student's |t-test |to |see |if |professors |or | students |exercise |more? a) |Sample |size, |mean |exercise |time, |standard |deviation b) |Sample |size, |median |exercise |time, |standard |deviation c) |Sample |size, |expected |exercise |time, |actual |exercise |time d) |Expected |exercise |time, |actual |exercise |time e) |Expected |exercise |time, |actual |exercise |time, |standard |deviation |- |โโa) |Sample |size, |mean | exercise |time, |standard |deviation
Which |level |of |protein |structure |is |most |immediately |coded |for |in |DNA? a) |Primary b) |Secondary c) |Tertiary d) |Quaternary e) |There |is |no |difference |between |the |above |answers |- |โโa) |Primary Use |the |following |diagram |of |sugar |molecules |to |answer |the |following |questions. |What |is |occuring | between |glucose |and |fructose? a) |Hydrolysis b) |Peptide |bond c) |Hydrogen |bond d) |Dehydration |synthesis e) |Hydrophobic |interaction |- |โโd) |Dehydration |synthesis Use |the |following |diagram |of |sugar |molecules |to |answer |the |following |questions. What |is |the |correct |name |for |the |bond |formed |in |the |reaction |to |produce |sucrose? a) |1-4 |glycosidic |linkage b) |2-1 |glycosidic |linkage c) |1-2 |glycosidic |linkage d) |double |bond e) |ionic |bond |- |โโc) |1-2 |glycosidic |linkage Fructose |is |a |________, |while |sucrose |is |a |__________. | a) |Disaccharide; |polysaccharide b) |Monosaccharide; |lipid c) |Monosaccharide; |fatty |acid d) |Monosaccharide; |disaccharide e) |Disaccharide; |hydrocarbon |- |โโd) |Monosaccharide; |disaccharide
In |my |"flask", |I |have |a |beverage |and |some |ice |cubes. |Which |of |the |following |statements |could |be | true |about |the |contents |of |my |"flask"? a) |There |are |more |hydrogen |bonds |per |water |molecule |within |the |ice |cubes |than |in |the |liquid. b) |The |ice |cubes |are |more |dense |than |the |liquid, |so |that's |why |they |float. c) |The |beverage |is |being |chilled |because |the |molecules |in |the |ice |cubes |are |absorbing |thermal | energy. d) |My |"flask" |contains |iced |coffee. e) |More |than |one |of |the |above |statements |are |true |- |โโe) |More |than |one |of |the |above |statements | are |true The |diagram |shows |an |example |of |a |biological |buffer |system |in |our |blood. |What |is |the |purpose |of | this |system? a) |To |ensure |the |number |of |CO2 |molecules |in |blood |is |equal |to |the |number |of |water |molecules b) |To |regulate |the |concentration |of |hydrogen |ions c) |To |create |more |hydroxide |ions d) |To |maintain |blood |pH |in |the |range |of |7.35-7. e) |More |than |one |of |the |aove |- |โโe) |More |than |one |of |the |above What |would |happen |in |the |buffer |system |if |there |was |a |shortage |of |hydrogen |ions? a) |Carbonic |acid |would |dissociate |into |bicarbonate |ion |and |hydrogen |ion b) |You |would |add |hydrochloric |acid |(HCl) |to |even |out |the |concentration c) |Hydrogen |ions |would |join |with |bicarbonate d) |Carbon |dioxide |would |interact |with |hydroxide |ions |instead |of |water |- |โโa) |Carbonic |acid |would | dissociate |into |bicarbonate |ion |and |hydrogen |ion Hydrogen |bonds | a) |are |crucial |in |maintaining |the |integrity |of |the |water |molecule b) |Hold |nucleotides |together |on |the |sugar-phosphate |backbones |of |DNA c) |Are |important |in |forming |branched |polysaccharides
