Question

151. Cytoplasmic streaming, a characteristic of Amoeba
and white blood cells of vertebrates is caused by
(1) Sliding microtubules Xcu
12) Elongating cell walls
(3) Contracting microfilaments
(4) Relaxing microtubules
pson​

Answer 1

Answer:

(3)

Explanation:

because muscle can only has

contractility

excitability

extensibility and elasticity

Answer 2

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Cytoplasmic streaming, a characteristic of Amoeba and white blood cells of vertebrates is caused by Contracting Microfilaments.

$\huge{\bold{\underline{Additional \: Points:-}}}$

• Microfilaments provide support to the Plasma membrane(Cell membrane).

• These (Microfilaments) helps in psuedopodia Formation in Amoeba & White blood cells (WBC).

• They (Microfilaments) helps in the Formation of Cleavage furrow during Cell division (Only in Animal cells).

• They are Composed of two different types of proteins I.e. Actin (Globular protein) & Myosin (Filamentous protein).

• It (Microfilaments) helps in providing Mechanical support, Motility & Maintenance of the shape of the cell.

• These (Microfilaments) are solid, Unbranched & rod - like fibrils of indefinite Lengths.