OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are microfilaments?
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Microfilaments are hollow and have a structure that resembles rope made of two twisted chain of protein called actin.
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Microfilaments are NOT HOLLOW and have a structure that resembles rope made of two twisted chains of protein called actin.
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Microfilaments are hollow and have a structure that resembles rope made of three twisted chains of protein called actin.
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Microfilaments are NOT HOLLOW and have a structure that resembles rope made of three twisted chains of protein called actin.
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Explanation:
Detailed explanation-1: -Microfilaments are thin (7 nm) molecules composed principally of actin protein subunits, which polymerize to form elongated actin filaments (F-actin). Individual actin molecules, called G-actin, carry ATP to provide energy for the polymerization process.
Detailed explanation-2: -Microfilaments are solid rods made of a protein known as actin. When it is first produced by the cell, actin appears in a globular form (G-actin; see Figure 1).
Detailed explanation-3: -Within the cell, actin filaments (also called microfilaments) are organized into higher-order structures, forming bundles or three-dimensional networks with the properties of semisolid gels.
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