BIOL 2200 Mid Semester Practice Questions
With Correct Answers
Phospholipid |bilayers |are |NOT |stabilised |by:
a.
van |der |Walls |forces
b.
covalent |bonds
c.
hydrogen |bonds
d.
ionic |bonds
e.
hydrophobic |interactions |- |CORRECT |ANSWER✔✔-b.
covalent |bonds
A |transmembrane |protein |has |the |following |properties: |it |has |two |binding |sites, |one |for |solute
|A |and |one |for |solute |B. |The |protein |can |undergo |a |conformational |change |to |switch |between |
two |states: |either |both |binding |sites |are |exposed |exclusively |on |one |side |of |the |membrane, |or
|both |are |exposed |exclusively |on |the |other |side |of |the |membrane. |The |protein |can |switch |
between |the |two |conformational |states |only |if |both |binding |sites |are |occupied |or |if |both |
binding |sites |are |empty, |but |cannot |switch |if |only |one |binding |site |is |occupied. |What |kind |of |
binding |site |do |these |properties |define?
a.
uniporter
b.
,ion |channel
c.
aniporter
d.
symporter |- |CORRECT |ANSWER✔✔-d. |symporter
Place |the |following |processes |involved |golgi |ribbon |formation |following |mitotic |exit |in |the |
correct |sequence.
Microtubule |clustering |of |golgi |membranes |at |the |peri-nuclear |region.
Formation |of |golgi |mini-stacks.
Golgin |tethering |of |golgi |membranes.
Golgi |membrane |fusion |using |a |SNARE-like |mechanism. |- |CORRECT |ANSWER✔✔-Formation |of |
golgi |mini-stacks.
Microtubule |clustering |of |golgi |membranes |at |the |peri-nuclear |region.
Golgin |tethering |of |golgi |membranes.
Golgi |membrane |fusion |using |a |SNARE-like |mechanism.
In |the |transfer |of |electrons |between |two |molecules, |the |molecules |that |lose |electrons |is |said |
to |be |_____________. |- |CORRECT |ANSWER✔✔-oxidized
Secretory |cargo |is |packaged |and |leaves |the |golgi |apparatus |at |the |_____________ |face. |- |
CORRECT |ANSWER✔✔-trans
, Which |of |the |following |statements |BEST |describes |protein |tertiary |structure |? |- |CORRECT |
ANSWER✔✔-The |folding |of |a |single |subunit |of |actin |into |a |globular |structure.
A |cisternal, |sheet-like |architecture |best |describes |the |____________ |endoplasmic |reticulum, |- |
CORRECT |ANSWER✔✔-rough
Invaginations |of |the |inner |mitochondrial |memrbane |are |known |as |_________________. |- |
CORRECT |ANSWER✔✔-cristae
Which |of |the |following |is |NOT |an |example |of |a |protein |post-translational |modification?
Proteolysis
Calcium-calmodulin |binding
Ubiquitination
Nitrosylation
Glycosylation.
Methylation |- |CORRECT |ANSWER✔✔-Calcium-calmodulin |binding
In |considering |the |organization |of |the |mitochondria, |what |would |you |predict |to |be |most |likely |
result |from |the |genetic |ablation |of |Mitofusins? |- |CORRECT |ANSWER✔✔-An |excess |of |
mitochondrial |fission |leading |to |many |individual |mitochondrial |organelles |within |the |cell.
Which |of |the |following |statements |about |the |nuclear |membrane |is |INCORRECT? |- |CORRECT |
ANSWER✔✔-The |nuclear |membrane |is |impermeable |to |proteins |and |RNA.
Each |signal |sequence |specifies |a |distinct |destination |within |the |cell |- |CORRECT |ANSWER✔✔-
True
With Correct Answers
Phospholipid |bilayers |are |NOT |stabilised |by:
a.
van |der |Walls |forces
b.
covalent |bonds
c.
hydrogen |bonds
d.
ionic |bonds
e.
hydrophobic |interactions |- |CORRECT |ANSWER✔✔-b.
covalent |bonds
A |transmembrane |protein |has |the |following |properties: |it |has |two |binding |sites, |one |for |solute
|A |and |one |for |solute |B. |The |protein |can |undergo |a |conformational |change |to |switch |between |
two |states: |either |both |binding |sites |are |exposed |exclusively |on |one |side |of |the |membrane, |or
|both |are |exposed |exclusively |on |the |other |side |of |the |membrane. |The |protein |can |switch |
between |the |two |conformational |states |only |if |both |binding |sites |are |occupied |or |if |both |
binding |sites |are |empty, |but |cannot |switch |if |only |one |binding |site |is |occupied. |What |kind |of |
binding |site |do |these |properties |define?
a.
uniporter
b.
,ion |channel
c.
aniporter
d.
symporter |- |CORRECT |ANSWER✔✔-d. |symporter
Place |the |following |processes |involved |golgi |ribbon |formation |following |mitotic |exit |in |the |
correct |sequence.
Microtubule |clustering |of |golgi |membranes |at |the |peri-nuclear |region.
Formation |of |golgi |mini-stacks.
Golgin |tethering |of |golgi |membranes.
Golgi |membrane |fusion |using |a |SNARE-like |mechanism. |- |CORRECT |ANSWER✔✔-Formation |of |
golgi |mini-stacks.
Microtubule |clustering |of |golgi |membranes |at |the |peri-nuclear |region.
Golgin |tethering |of |golgi |membranes.
Golgi |membrane |fusion |using |a |SNARE-like |mechanism.
In |the |transfer |of |electrons |between |two |molecules, |the |molecules |that |lose |electrons |is |said |
to |be |_____________. |- |CORRECT |ANSWER✔✔-oxidized
Secretory |cargo |is |packaged |and |leaves |the |golgi |apparatus |at |the |_____________ |face. |- |
CORRECT |ANSWER✔✔-trans
, Which |of |the |following |statements |BEST |describes |protein |tertiary |structure |? |- |CORRECT |
ANSWER✔✔-The |folding |of |a |single |subunit |of |actin |into |a |globular |structure.
A |cisternal, |sheet-like |architecture |best |describes |the |____________ |endoplasmic |reticulum, |- |
CORRECT |ANSWER✔✔-rough
Invaginations |of |the |inner |mitochondrial |memrbane |are |known |as |_________________. |- |
CORRECT |ANSWER✔✔-cristae
Which |of |the |following |is |NOT |an |example |of |a |protein |post-translational |modification?
Proteolysis
Calcium-calmodulin |binding
Ubiquitination
Nitrosylation
Glycosylation.
Methylation |- |CORRECT |ANSWER✔✔-Calcium-calmodulin |binding
In |considering |the |organization |of |the |mitochondria, |what |would |you |predict |to |be |most |likely |
result |from |the |genetic |ablation |of |Mitofusins? |- |CORRECT |ANSWER✔✔-An |excess |of |
mitochondrial |fission |leading |to |many |individual |mitochondrial |organelles |within |the |cell.
Which |of |the |following |statements |about |the |nuclear |membrane |is |INCORRECT? |- |CORRECT |
ANSWER✔✔-The |nuclear |membrane |is |impermeable |to |proteins |and |RNA.
Each |signal |sequence |specifies |a |distinct |destination |within |the |cell |- |CORRECT |ANSWER✔✔-
True
