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Structure of Contractile Proteins

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Questions and Answers

What is the structure of each actin (thin) filament?

Contains multiple tropomyosin molecules intertwined with each other

A complex protein Troponin distributed throughout its length

Consists of only one F actin helically wound to itself

Made of two G actins helically wound to each other (correct)

What constitutes one thick filament in muscle cells?

Troponin

Meromyosins (correct)

Tropomyosin

G actin

What are the two important parts of a meromyosin?

Globular tail and long arm

G actin and F actin

Tropomyosin and Troponin

Heavy meromyosin and light meromyosin (correct)

What type of enzyme is the globular head of meromyosin?

ATPase enzyme Signup and view all the answers

What protein masks the active binding sites for myosin on the actin filaments in the resting state?

Troponin Signup and view all the answers

Where are the CA Actin binding sites located?

On F actins Signup and view all the answers

Structure of Contractile Proteins

Choose a study mode

Podcast

Questions and Answers

What is the structure of each actin (thin) filament?

What constitutes one thick filament in muscle cells?

What are the two important parts of a meromyosin?

What type of enzyme is the globular head of meromyosin?

What protein masks the active binding sites for myosin on the actin filaments in the resting state?

Where are the CA Actin binding sites located?

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