MCB 252 Final Exam 50 Questions With Correct
Answers 2026
true/false
The two ends of a microtubule that is growing in vitro (with neither end
capped) have different critical concentrations. >>>>true
Which proteins are MAPS? >>>>proteins that bind the GTP cap and
promote assembly of microtubules
proteins that promote the bending of proto-filaments and promote
disassembly of microtubules
proteins that bind the sides of microtubules and connect to other proteins
such as IFs
true/false
as described in lecture, MT assembly is best described as an equilibrium
reaction rather than a steady state reaction >>>>false
MT assembly is a steady state reaction
true/false
dyneins are minus end directed motor proteins >>>>true
true/false
dyneins and kinesins are part of the same superfamily of proteins
>>>>false
, MCB 252 Final Exam 50 Questions With Correct
Answers 2026
in which of the following time frames do we think that LUCA existed?
>>>>3.6 to 4.1 billion years ago
true/false
the progenitor of the AAA ATPase family of proteins existed before the
eubacteria, the archaebacteria, and the eukaryotes diverged from each
other >>>>true
organisms such as octopi and cuttlefish that can change color do so by
regulating the activity of: >>>>motor proteins
In lecture we talked about an experiment that allow us to figure out the
conformational change associated with the power stroke of dynein. In
that experiment we compared EM micrographs of dynein molecules
trapped in the pre-power stroke conformation with EM micrographs of
dynein molecules trapped in the post-power stroke conformation. What
nucleotide did we use to trap dynein motors in the pre-power stroke
conformation? >>>>ADP-Vi
which part of the dynein family members binds the microtubules?
>>>>the stalk
Which part of dynein family members contains the ATPase? >>>>the
head
true/false
Answers 2026
true/false
The two ends of a microtubule that is growing in vitro (with neither end
capped) have different critical concentrations. >>>>true
Which proteins are MAPS? >>>>proteins that bind the GTP cap and
promote assembly of microtubules
proteins that promote the bending of proto-filaments and promote
disassembly of microtubules
proteins that bind the sides of microtubules and connect to other proteins
such as IFs
true/false
as described in lecture, MT assembly is best described as an equilibrium
reaction rather than a steady state reaction >>>>false
MT assembly is a steady state reaction
true/false
dyneins are minus end directed motor proteins >>>>true
true/false
dyneins and kinesins are part of the same superfamily of proteins
>>>>false
, MCB 252 Final Exam 50 Questions With Correct
Answers 2026
in which of the following time frames do we think that LUCA existed?
>>>>3.6 to 4.1 billion years ago
true/false
the progenitor of the AAA ATPase family of proteins existed before the
eubacteria, the archaebacteria, and the eukaryotes diverged from each
other >>>>true
organisms such as octopi and cuttlefish that can change color do so by
regulating the activity of: >>>>motor proteins
In lecture we talked about an experiment that allow us to figure out the
conformational change associated with the power stroke of dynein. In
that experiment we compared EM micrographs of dynein molecules
trapped in the pre-power stroke conformation with EM micrographs of
dynein molecules trapped in the post-power stroke conformation. What
nucleotide did we use to trap dynein motors in the pre-power stroke
conformation? >>>>ADP-Vi
which part of the dynein family members binds the microtubules?
>>>>the stalk
Which part of dynein family members contains the ATPase? >>>>the
head
true/false
