BIOL2200 Mid Semester Practice Questions 100% Correct Answers Verified Latest 2024 Version
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Phospholipid bilayers are NOT stabilised by:
a.
van der Walls forces
b.
covalent bonds
c.
hydrogen bonds
d.
ionic bonds
e.
hydrophobic interactions - b.
covalent bonds
A transmembrane protein has the following properties: it has two binding sites, one for solute A and one
for solute B....
BIOL2200 Mid Semester Practice Questions
| 100% Correct Answers | Verified | Latest
2024 Version
Phospholipid bilayers are NOT stabilised by:
a.
van der Walls forces
b.
covalent bonds
c.
hydrogen bonds
d.
ionic bonds
e.
hydrophobic interactions - ✔✔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 - ✔✔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. - ✔✔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
_____________. - ✔✔oxidized
Secretory cargo is packaged and leaves the golgi apparatus at the _____________ face. - ✔✔trans
Which of the following statements BEST describes protein tertiary structure ? - ✔✔The folding of a single
subunit of actin into a globular structure.
A cisternal, sheet-like architecture best describes the ____________ endoplasmic reticulum, - ✔✔rough
Invaginations of the inner mitochondrial memrbane are known as _________________. - ✔✔cristae
, Which of the following is NOT an example of a protein post-translational modification?
Proteolysis
Calcium-calmodulin binding
Ubiquitination
Nitrosylation
Glycosylation.
Methylation - ✔✔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? - ✔✔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? - ✔✔The nuclear
membrane is impermeable to proteins and RNA.
Each signal sequence specifies a distinct destination within the cell - ✔✔True
Genomic DNA wrapped around an octomer of histones is also referred to as a _______________. -
✔✔chromatin/nucleosome
Which of the following is NOT essential for cotranslational translocation of protein into the endoplasmic
reticulum? - ✔✔A stop-transfer anchor sequence.
The endoplasmic reticulum (ER) is made up of two distinct compartments, the smooth ER and the rough
ER. - ✔✔False - they are one unit
Ribosomal subunits are first generated in the ______________ of the cell. - ✔✔nucleus
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