MCB 252 FINAL EXAM |NEW AND UPDATED 2026
|WITH VERIFIED QUESTIONS AND ANSWERS!!!
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
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
|WITH VERIFIED QUESTIONS AND ANSWERS!!!
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
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
