Asked by Oliver Price on Jul 08, 2024
Verified
What is tropomyosin?
A) A protein found along the groove of the F-actin double helix
B) A T tubule and two adjacent terminal cisternae
C) The combination of myosin heads with active sites on actin molecules
D) The movement of myosin head while attached to actin myofilament
E) After exercise, the O2 taken in that exceeds the O2 required for resting metabolism
F-actin Double Helix
A structural configuration of actin filaments arranged in a twisted double helix, significant in muscle contraction and cell movement.
Tropomyosin
A regulatory protein in muscle cells that blocks the binding site for myosin on actin molecules, preventing muscle contraction in the absence of calcium.
Protein
Large molecules made up of amino acids that perform a variety of functions in the body, including structural support, enzyme catalysis, and transportation.
- Comprehend the architecture and role of muscle elements like the triad and myofilaments.
Verified Answer
SP
Scottie PimpinJul 11, 2024
Final Answer :
A
Explanation :
Tropomyosin is a protein that runs along the groove of the F-actin double helix, playing a crucial role in muscle contraction by regulating the access of myosin to its binding sites on actin filaments.
Learning Objectives
- Comprehend the architecture and role of muscle elements like the triad and myofilaments.