Assertion (A): Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements.
Reason (R): There are three principal types of protein filaments - actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.

Both A and R are correct and R is the correct explanation of A

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Both A and R are correct, but R is not the correct explanation of A

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A is correct, but R is incorrect

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Both A and R are incorrect

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Solution

The correct option is A Both A and R are correct and R is the correct explanation of A
Eukaryotic cells (particularly animal and lower plant cells) have the ability to adopt a variety of shapes and carry out directed movements because they have a network of protein fibres that support the shape of the cell and anchor organelles to a fixed location. This network is called cytoskeleton. The cytoskeleton is made up of three types of protein filaments: actin filaments, microtubules and intermediate filaments.

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Assertion (A): Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements. Reason (R): There are three principal types of protein filaments - actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.

Assertion (A): Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements.
Reason (R): There are three principal types of protein filaments - actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.