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Fill in the blanks. The thin filaments o...

Fill in the blanks. The thin filaments of myofibril contain (A) actin and two filaments of (B) protein along with (C) protein for masking blinding site for myosin.

A

(A)1F (B)Troponin (C)Tropomyodin

B

(A)1F (B)Tropomyosin (C)Troponin

C

(A)2F (B)Troponin (C)Tropomyosin

D

(A)2F (B)Tropomyosin (C)Troponin

Text Solution

AI Generated Solution

The correct Answer is:
To fill in the blanks for the statement regarding the thin filaments of myofibrils, we can break down the information as follows: 1. **Identify the components of thin filaments**: - The thin filaments are primarily composed of actin. - The specific type of actin involved is known as F-actin (filamentous actin), which is made up of monomeric units called G-actin (globular actin). 2. **Identify the additional proteins associated with thin filaments**: - Alongside actin, there are two additional proteins that run closely with the actin filaments. These are tropomyosin and troponin. - Tropomyosin is a protein that wraps around the actin filaments and helps regulate the interaction between actin and myosin. - Troponin is another protein complex that is associated with tropomyosin and is responsible for masking the binding sites on actin for myosin. 3. **Fill in the blanks**: - (A) actin - (B) tropomyosin (the two filaments of this protein run along the actin) - (C) troponin (this protein masks the binding site for myosin) Thus, the completed statement is: "The thin filaments of myofibril contain (A) actin and two filaments of (B) tropomyosin along with (C) troponin for masking the binding site for myosin."
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