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Questions and Answers
What is the composition of thick filaments in microfilaments?
What is the composition of thick filaments in microfilaments?
- Composed of keratin (7-10 nm in diameter)
- Composed of actin (5 nm in diameter)
- Composed of tubulin
- Composed of myosin (12 nm in diameter) (correct)
What is the function of free ribosomes?
What is the function of free ribosomes?
- Production of motion in the cell
- Structural support to the cytoplasm
- Synthesis of protein used inside the cell (correct)
- Synthesis of protein used outside the cell
What gives structural support to the cytoplasm and shapes the cell?
What gives structural support to the cytoplasm and shapes the cell?
- Centriole
- Endoplasmic reticulum
- Cytoskeleton (correct)
- Ribosome
Where are centrioles located in non-dividing cells?
Where are centrioles located in non-dividing cells?
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What is the function of attached ribosomes?
What is the function of attached ribosomes?
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Study Notes
Microfilaments
- Thick filaments are composed of myosin
Ribosomes
- Free ribosomes function in synthesizing proteins that are released into the cytosol
- Attached ribosomes function in synthesizing proteins that are inserted into membranes or exported from the cell
Cytoplasm and Cell Shape
- Microfilaments (actin filaments) give structural support to the cytoplasm and shape the cell
Centrioles
- In non-dividing cells, centrioles are located near the nucleus and are involved in the formation of cilia and flagella
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