Question

c) Which of the following describes the cytoskeleton?
1. A web of proteins that gives shape and support to the cell.
2. A membrane-bound organelle that contains genetic material.
3. The outer covering of a cell that separates it from the environment.
4. The structure that contains the information about how to make a cell’s proteins.

Answer 1

Answer:

3

Explanation:

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Answer 2

The option that describes the cytoskeleton in 1. A web of proteins that gives shape and support to the cell.

• Inside the cells thread like filamentous structures are present that are made up of protein.
• They help in providing structure and shape to the cells. They also help in the motility of a cell.
• Cytoskeletal elements are absent in prokaryotic cells.
• There are three types of cytoskeletal elements that include:
• Micro-filaments
• Intermediate filaments
• Microtubules.
• Micro-filaments help in muscle contraction and amoeboid movement through the help of pseudopodia.
• Intermediate filaments give support to the nuclear membrane.
• One microtubule consists of 13 protofilaments.
• They form structures like cilia, flagella, basal body and spindle fibres.

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