BIO 1A03 Test 2 Questions With Correct Answers

BIO 1A03 Test 2 Questions With Correct
Answers

one |gene-one |enzyme |hypothesis |- |CORRECT |ANSWER✔✔-each |gene |contains |the |information
|needed |to |make |an |enzyme




What |did |George |Beadle |and |Edward |Tatum |research? |- |CORRECT |ANSWER✔✔-Relationship |
between |genes |and |proteins |using |the |Neurospora |Crassa



One |gene-one |enzyme |hypothosis |(Neuroposa |Example) |- |CORRECT |ANSWER✔✔-Neurospora |
can |grow |well |on |minimal |medium |(simple |sugar, |vitamins, |inorganic |salts), |and |therefore |it |
must |have |enzymes |produced |by |a |certain |gene |that |that |transform |these |materials |into |
amino |acids |and |vitamins |needed |for |growth.



Metabolic |pathway |of |Arginine |- |CORRECT |ANSWER✔✔-Precursor, |Ornithine, |Citrulline, |
Arginine



Adrian |Srb |and |Norman |Horowitz |- |CORRECT |ANSWER✔✔-Radiation |treated |neurospora |to |
create |mutations |in |DNA |code. |They |identified |three |mutants



Medium |supplemented |with |arginine |- |CORRECT |ANSWER✔✔-POSITIVE |CONTROL |(Growth)



Non-supplemented |medium |- |CORRECT |ANSWER✔✔-No |Growth



Exceptions |to |one |gene |one |enzyme |hypothesis |- |CORRECT |ANSWER✔✔-More |than |one |
protein |can |be |produced |from |a |single |gene |- |post |translational |modification |of |proteins |
allows |for |the |production |of |diverse |proteins |with |specific |roles

,What |allows |of |the |synthesis |of |a |polypeptide |chain |during |translation? |- |CORRECT |
ANSWER✔✔-GTP-dependent |factors



Where |does |the |majority |of |glucose |absorption |take |place? |- |CORRECT |ANSWER✔✔-Microvilli |
cells |of |the |small |intestine



How |many |amino |acids |are |translated |from |the |insulin |gene |- |CORRECT |ANSWER✔✔-110 |
amino |acids



How |many |chains |is |a |functional |insulin |protein |made |of? |- |CORRECT |ANSWER✔✔-2 |(alpha |
and |beta)



Alpha |chain |- |CORRECT |ANSWER✔✔-21 |amino |acids



Beta |chain |- |CORRECT |ANSWER✔✔-30 |amino |acids



Preproinsulin |- |CORRECT |ANSWER✔✔-Protein |cleaved |to |become |proinsulin |which |is |cleaved |
to |become |insulin



How |do |you |get |from |preproinsulin |to |proinsulin |- |CORRECT |ANSWER✔✔-Cleavage |of |the |n-
terminal |signal |sequence



Proinsulin |to |insulin |- |CORRECT |ANSWER✔✔-Undergoes |folding, |goes |from |rough |ER |to |Golgi, |
where |cleavage |of |c-chain |occurs



List |postranslational |modifications |- |CORRECT |ANSWER✔✔-Cleavage, |phosphorylation, |
methylation, |acetylation

, Phosporylation |- |CORRECT |ANSWER✔✔-The |adding |of |a |phospate |to |a |molecule |using |kinase |
enzyme



Receptors |- |CORRECT |ANSWER✔✔-Proteins |that |receive |and |interpret |messages |from |
signalling |molecules



dimerization |- |CORRECT |ANSWER✔✔-pairing |of |two |receptor-hormone |complexes



glucose |transporters |- |CORRECT |ANSWER✔✔-proteins |that |assist |in |the |transport |of |glucose |
molecules |across |cell |membranes



location |of |translation |- |CORRECT |ANSWER✔✔-cytoplasm



Number |of |anticodon |loops |on |tRNA |- |CORRECT |ANSWER✔✔-3



Direction |of |Anticodon |- |CORRECT |ANSWER✔✔-3' |to |5'



What |is |the |point |of |attachment |for |the |amino |acid |to |the |tRNA |- |CORRECT |ANSWER✔✔-
terminal |adenine



aminoacyl-tRNA |synthetase |- |CORRECT |ANSWER✔✔-An |enzyme |that |joins |each |amino |acid |to |
the |appropriate |tRNA.



Once |bound |to |the |active |site, |these |enzymes |can |then |catalyze |the |covalent |attachment |of |a |
tRNA |molecule |to |its |amino |acid |using |the |energy |from.... |- |CORRECT |ANSWER✔✔-ATP |
hydrolysis



How |many |codons |are |there? |- |CORRECT |ANSWER✔✔-64