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Question
Microfilaments are composed mainly of a protein called
Microfilaments are composed mainly of a protein called
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Solution
The correct option is D Actin
The correct option is D
Explanation of correct option
Option D:
- Actin is a ubiquitous intracellular protein found in all eukaryotic cells that play a key role in muscle contraction and cell movement.
- Actin is also involved in the maintenance and regulation of cell shape and architecture.
- Actin is a protein that creates filaments that offer mechanical support and movement driving forces to cells.
- It is involved in a variety of biological functions, including detecting external stimuli, internalizing membrane vesicles, moving over surfaces, and cell division.
Explanation of incorrect options
Option A:
- Chitin is an important biopolymer found in nature.
- Fungi, arthropods, and nematodes are the principal producers. In insects, it acts as a scaffold, supporting the epidermis and trachea cuticles, as well as the peritrophic matrices that line the gut epithelium.
- After cellulose, chitin is the second most prevalent biodegradable polymer generated in nature. It's an acetylated polysaccharide made up of N-acetyl-d-glucosamine groups coupled by (14) links that come in the form of organized crystalline microfibrils.
Option B:
- Myosin is a molecular motor prototype—a protein that transfers chemical energy in the form of ATP into mechanical energy, allowing it to generate force and movement.
- Myosin is a motor protein that creates a force in muscle contractions, similar to how an oar stroke generates force. It has two parts: a head and a tail. The shaft of the thick filament is formed by the tails of around 300 myosin molecules.
Option C:
- Tubulin is a dimeric protein that is found in all eukaryotes and is required for their survival.
- Tubulin dimers form microtubules, which are dynamic polymers involved in a range of tasks, the most notable of which is mitosis. Guanosine triphosphate hydrolysis is involved in tubulin construction and disassembly.
Final answer: Microfilaments are composed mainly of a protein called actin.
Actin
The correct option is D
Explanation of correct option
Option D:
- Actin is a ubiquitous intracellular protein found in all eukaryotic cells that play a key role in muscle contraction and cell movement.
- Actin is also involved in the maintenance and regulation of cell shape and architecture.
- Actin is a protein that creates filaments that offer mechanical support and movement driving forces to cells.
- It is involved in a variety of biological functions, including detecting external stimuli, internalizing membrane vesicles, moving over surfaces, and cell division.
Explanation of incorrect options
Option A:
- Chitin is an important biopolymer found in nature.
- Fungi, arthropods, and nematodes are the principal producers. In insects, it acts as a scaffold, supporting the epidermis and trachea cuticles, as well as the peritrophic matrices that line the gut epithelium.
- After cellulose, chitin is the second most prevalent biodegradable polymer generated in nature. It's an acetylated polysaccharide made up of N-acetyl-d-glucosamine groups coupled by (14) links that come in the form of organized crystalline microfibrils.
Option B:
- Myosin is a molecular motor prototype—a protein that transfers chemical energy in the form of ATP into mechanical energy, allowing it to generate force and movement.
- Myosin is a motor protein that creates a force in muscle contractions, similar to how an oar stroke generates force. It has two parts: a head and a tail. The shaft of the thick filament is formed by the tails of around 300 myosin molecules.
Option C:
- Tubulin is a dimeric protein that is found in all eukaryotes and is required for their survival.
- Tubulin dimers form microtubules, which are dynamic polymers involved in a range of tasks, the most notable of which is mitosis. Guanosine triphosphate hydrolysis is involved in tubulin construction and disassembly.
Final answer: Microfilaments are composed mainly of a protein called actin.
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