Question

Match the motor molecule to its function.

A) processive movement toward microtubule plus end
B) movement along microtubule toward its minus end
C) processive movement toward actin filament plus end
D) generates force on actin filaments in a sarcomere
E) generates force for sliding of flagellar microtubules

1) cytoplasmic dynein
2) axonemal dynein
3) kinesin
4) myosin V dimer
5) myosin II filament

Answer 1

Motor proteins such as kinesin, cytoplasmic dynein, myosin V dimer, myosin II filament, and axonemal dynein have distinct functions, including moving cargo within cells, generating force in muscle contractions, and enabling movement of cilia and flagella.

Step-by-step explanation:

Matching the motor molecule to its function involves understanding the behavior of different motor proteins within the cell. Here's how they match up:

• A) processive movement toward microtubule plus end - 3) kinesin
• B) movement along microtubule toward its minus end - 1) cytoplasmic dynein
• C) processive movement toward actin filament plus end - 4) myosin V dimer
• D) generates force on actin filaments in a sarcomere - 5) myosin II filament
• E) generates force for sliding of flagellar microtubules - 2) axonemal dynein

Each motor protein has a specific directionality and function in intracellular transport and movement. For instance, kinesin is known for its movement towards the plus end of microtubules, commonly carrying cargo such as vesicles. Cytoplasmic dynein typically moves towards the minus end of microtubules, playing a role in retrograde transport. Myosin V is involved in the transport of organelles and vesicles along actin filaments. The myosin II filament is a vital component in muscle contraction, while axonemal dynein is responsible for the bending and sliding motion of cilia and flagella.