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Questions and Answers
What is the primary function of the endoplasmic reticulum in a cell?
What is the primary function of the endoplasmic reticulum in a cell?
- Production of chlorophyll
- Synthesis of amino acids
- Movement during cell division
- Transport of materials within the cell (correct)
Where are ribosomes located in a cell and what is their main function?
Where are ribosomes located in a cell and what is their main function?
- In the cytoplasm; to make proteins from amino acids (correct)
- In the nucleus; to synthesize DNA
- On the endoplasmic reticulum; to store energy
- Near the nucleus; to move organelles
What role do centrioles play in cell division?
What role do centrioles play in cell division?
- Absorbing sunlight for energy
- Synthesis of pigments
- Facilitating protein synthesis
- Moving to opposite poles of the nucleus (correct)
What is the function of chloroplasts in plant cells?
What is the function of chloroplasts in plant cells?
Which of the following statements is true regarding chloroplasts and animal cells?
Which of the following statements is true regarding chloroplasts and animal cells?
What is the main component of the plant cell wall?
What is the main component of the plant cell wall?
Which of the following correctly describes the cell membrane?
Which of the following correctly describes the cell membrane?
Where is the nucleus located in plant cells compared to animal cells?
Where is the nucleus located in plant cells compared to animal cells?
What is the function of chromosomes found in the nucleus?
What is the function of chromosomes found in the nucleus?
Which of the following statements about the cell wall is false?
Which of the following statements about the cell wall is false?
What is the semi-viscous material inside the cell that facilitates cellular functions called?
What is the semi-viscous material inside the cell that facilitates cellular functions called?
The nucleus is bounded by which membrane?
The nucleus is bounded by which membrane?
What primarily composes the cytoplasm?
What primarily composes the cytoplasm?
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Study Notes
Cell Wall
- Present in plants, algae, fungi, and bacteria; absent in animal cells.
- Composed mainly of cellulose in plant cells.
- Provides structural support and maintains cell shape.
Cell Membrane
- Outermost covering in animal cells; located inside the cell wall in plant cells.
- Partially permeable, also known as the plasma membrane.
- Composed of lipids and proteins; regulates entry and exit of substances.
Nucleus
- Central organelle in animal cells, pushed to the side by vacuole in plant cells.
- Functions as the control center of the cell, often described as the brain.
- Bounded by a nuclear membrane; contains nucleoplasm with chromosomes.
- Chromosomes consist of DNA and proteins, essential for genetic information.
Cytoplasm
- Semi-viscous substance filling the cell, consisting mainly of water, salts, and proteins.
- Most cellular functions occur here, supporting the organelles.
Chloroplast
- Found only in plant cells; contains chlorophyll, the green pigment.
- Chlorophyll captures sunlight for photosynthesis, making chloroplasts the food producers of plant cells.
Ribosomes
- Small structures in cytoplasm responsible for protein synthesis from amino acids.
Centrioles
- Paired cylindrical structures located near the nucleus in animal cells.
- Not present in plant cells; assist in cell division by moving to opposite poles of the nucleus.
Endoplasmic Reticulum
- Network of tubular membranes in the cytoplasm, involved in transporting materials within the cell.
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