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York University
BIOL 1001
Paula Wilson

BIOL  1010  Fall  Practise  Questions  -­‐  KEY                   1. Which  of  the  following  best  describes  how  an  organism  like  a  limpet  or  flatworm,  that  lacks   image-­‐forming  eyes,  can  use  light  to  sense  surroundings?   A. These  organisms  possess  many  individual  ommatidia  that  act  together  in  vision.   B. Photoreceptor   cells   allow   light   to   be   sensed,   and   surrounding   tissues   may   provide   information  about  the  direction  of  light.   C. Photosynthetic  proteins  can  capture  photons  of  light,  and  reactions  convert  the  energy  to   chemical  form.   D. The  eye  in  such  animals  resembles  a  vertebrate  eye,  with  lens  and  retina,  but  the  organism   lacks  the  brain  necessary  for  processing  images  in  the  same  way.   E. Phytochrome   molecules   respond   to   certain   wavelengths   of   light,   and   can   cause   certain   physiological  responses  based  on  the  state  of  this  photoreceptor  molecule.     2. Which  of  the  following  is  NOT  an  example  of  how  living  organisms  can  use/exploit  light  (in  a   beneficial  way)?   A. Daylight  affects  physiological  processes,  such  as  appetite  and  sleep,  in  many  animals.   B. Certain  flowering  plants  will  only  flower  when  day  (or  night)  length  reaches  a  particular  limit.   C. Some  wavelengths  of  light  can  damage  biological  molecules  like  DNA.   D. Certain  animal  pollinators  are  attracted  to  flowers  of  a  particular  colour.   E. Plants  use  light  in  photosynthesis.     3. A  species  is  defined  by     A. comparison  of  genetic  sequences.   B. morphological  similarities.   C. the  ability  to  mate  and  produce  fertile  offspring.   D. biochemical  and  metabolic  similarities.   E. Any  of  the  above  could  be  used,  depending  on  the  nature  of  the  organism.       4. Which  of  the  following  is  the  best  example  of  evolution  (as  defined  in  Biology)?   A. Lee’s  excessive  consumption  of  alcohol  after  retirement  caused  changes  in  her  liver  cells,   leading  to  serious  liver  disease  at  the  age  of  76.   B. A  lake  in  Northern  Alberta  has  larger  populations  of  green  algae  than  were  present  10  years   ago,  as  pollution  caused  some  die-­‐offs  of  fish  and  other  aquatic  animals.   C. A  farmer  finds  a  high-­‐yield  wheat  plant,  keeps  the  seeds  to  grow  the  next  year,  and  over   16  years,  continues  to  keep/grow  plants  of  high-­‐yield  plants  until  90%  of  his  fields  are  this   variety.   D. Pat  now  works  out  regularly  at  the  gym,  and  compared  to  6  years  ago  when  he  started   working  out,  is  now  highly  muscled.           1 BIOL  1010  Fall  Practise  Questions  -­‐  KEY                   5. Comparing  the  (scientific  meaning  of)  terms  ‘hypothesis’  and  ‘theory’,  which  of  the  following   statements  is  true?   A. There  is  no  difference—the  terms  are  interchangeable.   B. A   theory   is   a   speculative   statement   to   be   tested;   hypotheses   are   testable   explanations   supported  by  facts  gathered  over  time.   C. A  hypothesis  is  a  speculative  statement  to  be  tested;  theories  are  testable  explanations   supported  by  facts  gathered  over  time.   D. A  hypothesis  can  be  considered  as  a  well-­‐accepted  explanation;  a  theory  is  another  term  for     “null  hypothesis”.     6. Prokaryotes  are  the  only  representatives  in  these  two  nutritional  categories:   A. chemoautrotrophs  and  photoautrotrophs.   B. chemoautrotrophs  and  photoheterotrophs.   C. chemoheterotrophs  and  photoheterotrophs.   D. chemoheterotrophs  and  photoautotrophs.   E. All  nutritional  categories  include  members  of  each  domain  (Bacteria,  Archaea,  Eukarya).     7. Antibiotics  have  been  overprescribed  over  the  last  few  decades  and  we  now  see  many  bacterial   strains  circulating  in  our  society  that  are  antibiotic  resistant.  This  scenario  is  an  example  of     A. selection.             B. endosymbiosis.   C. species  biodiversity.       D. reproductive  isolation.   E. starvation.     8. In  a  living  organism,  the  normal  information  flow  in  production  of  proteins  from  hereditary   material  is   A. DNA    transcription    translation     B. RNA    translation    transcription     C. Ribosome    DNA    transcription     D. DNA    translation    transcription   E. RNA    transcription    translation     9. A  DNA  double  helix  is  made  up  of  two  strands  that  are  held  to  each  other  by     A. hydrogen  bonds.   B. ionic  bonds.   C. hydrophobic  interactions.   D. phosphodiester  bonds.         2 BIOL  1010  Fall  Practise  Questions  -­‐  KEY                     10. Cells  from  all  domains  (Bacteria,  Archaea,  Eukarya)  contain  which  structures:   A. chromosome,  ribosomes,  plasma  membrane.   B. cell  wall,  capsule,  and  ribosomes.   C. cell  wall,  flagella,  and  ribosomes.   D. chromosome,  mitochondria,  plasma  membrane.   E. chromosome,  cell  wall,  and  nuclei.         11. The  following  statements  all  support  why  the  bacterium  E.  coli  is  considered  a  useful  model   organism,  EXCEPT:  
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