GR. 2 Flashcards
What is the main mechanism behind the movement of cilia and flagella?
(C) Dynein-driven sliding and nexin-regulated bending
Question: True or False: Intermediate filaments require ATP or GTP for polymerization and growth.
(B) False
Which protein is the main component of microfilaments?
(D) Actin
What is the process called when actin filaments grow at the barbed (+) end and disassemble at the
pointed (-) end?
(A) Treadmilling
It is a process by which new microtubules are initiated or seeded within the cell?
(A) Microtubule nucleation
It acts as a template for the assembly of the microtubules that make up cilia and flagella?
(D) Basal body
This structure is known as the “9+2” arrangement of microtubules, meaning there are 9 pairs of
microtubules arranged in a circles around 2 central microtubules?
(A) Cilia
What is the role of nucleating proteins in actin filament formation?
(B) They promote the formation of branched or unbranched actin filaments.
Which actin-binding protein helps maintain a high concentration of G-actin by preventing
polymerization?
(B) Thymosin β4
What is the role of the growth cone in axon development?
(C) It helps the axon grow by responding to physical and chemical cues.
This transport is a bi-directional transport and is achieved because of microtubular-associated proteins
Axonal Transport
Dynein is attached by a soluble protein complex called?
Dynactin
Myosin is a motor protein that moves along microfilaments, what
are the other two proteins that move along microtubules?
Kinesin and Dynein
This enables scientists to monitor the behavior of individual motor proteins in real time.
In Vitro Motility Assays
This improves the clarity of observations by concentrating on a narrow plane, thereby minimizing background noise.
Total Internal Reflection Fluorescence Microscopy
Name one cellular structure where microtubules play an important role.
Cilia
Give an example of conventional myosin.
Myosin II
Aside from actin, what other protein is present in the thin filament of muscle fiber?
Tropomyosin or Troponin
A process or steps that link the arrival of a nerve impulse at the
muscle plasma membrane to the shortening of the sarcomeres deep
within the muscle fiber.
Excitation-Contraction Coupling
