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Questions and Answers
What is the primary function of a cell wall?
What is the primary function of a cell wall?
- Regulate the passage of genetic material
- Generate energy for the cell
- Facilitate cellular communication and signaling
- Provide structural support, shape, and protection (correct)
Which organisms commonly have cell walls?
Which organisms commonly have cell walls?
- Algae, animals, and fungi
- Plants, animals, and bacteria
- Fungi, algae, plants, and most prokaryotes (correct)
- Animals, fungi, and some prokaryotes
What is the primary component of the primary cell wall in land plants?
What is the primary component of the primary cell wall in land plants?
- Glycoproteins and carrageenan
- Lignin and suberin
- Polysaccharides like cellulose, hemicelluloses, and pectin (correct)
- Peptidoglycan
What is the main component of bacterial cell walls?
What is the main component of bacterial cell walls?
What is the unique component of diatoms' cell walls?
What is the unique component of diatoms' cell walls?
Which organelle is responsible for maintaining the shape and structure of the cell as well as storing waste products?
Which organelle is responsible for maintaining the shape and structure of the cell as well as storing waste products?
Which organelle is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell?
Which organelle is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell?
Which organelle is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells?
Which organelle is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells?
Which structure does not belong to the endomembrane system in eukaryotic cells?
Which structure does not belong to the endomembrane system in eukaryotic cells?
What is a relatively small, membrane-enclosed sac that stores or transports substances?
What is a relatively small, membrane-enclosed sac that stores or transports substances?
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Study Notes
Cell Walls
- The primary function of a cell wall is to provide structural support, protection, and maintain the cell's shape.
Organisms with Cell Walls
- Cell walls are commonly found in bacteria, archaea, fungi, plants, and some protists.
Plant Cell Walls
- The primary component of the primary cell wall in land plants is cellulose.
Bacterial Cell Walls
- The main component of bacterial cell walls is peptidoglycan (also known as murein).
Diatom Cell Walls
- The unique component of diatoms' cell walls is frustules, which are made of silica (silicon dioxide).
Organelles
Lysosomes
- Lysosomes are responsible for maintaining the shape and structure of the cell as well as storing waste products.
Golgi Apparatus
- The Golgi apparatus is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell.
Endoplasmic Reticulum
- The endoplasmic reticulum (ER) is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells.
Endomembrane System
- The structure that does not belong to the endomembrane system in eukaryotic cells is lysosomes.
Vesicles
- A vesicle is a relatively small, membrane-enclosed sac that stores or transports substances.
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