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Questions and Answers
What is the function of the cell membrane?
What is the function of the cell membrane?
- It maintains the integrity of the nucleus.
- It regulates interactions with other cells and controls the movement of substances from the interior to exterior.
- It contains the genetic material of the cell.
- It is a permeable and selective barrier that separates the external environment from the inside of the cell. (correct)
What distinguishes eukaryotic cells from prokaryotic cells?
What distinguishes eukaryotic cells from prokaryotic cells?
- Eukaryotic cells lack a plasma membrane.
- Eukaryotic cells are smaller in size compared to prokaryotic cells.
- Eukaryotic cells are unicellular organisms.
- Eukaryotic cells have a differentiated nucleus with complex DNA and numerous organelles. (correct)
What is true about multicellular organisms?
What is true about multicellular organisms?
- They are made up of several cells grouped together and specialized in certain functions within the organism itself. (correct)
- They lack a plasma membrane.
- They contain only one type of cell throughout their entire body.
- They are always unicellular.
What is found inside a eukaryotic cell?
What is found inside a eukaryotic cell?
What happens when cells resembling each other group together?
What happens when cells resembling each other group together?
What is the role of organelles in eukaryotic cells?
What is the role of organelles in eukaryotic cells?
What distinguishes unicellular organisms from multicellular organisms?
What distinguishes unicellular organisms from multicellular organisms?
What does the nucleus of a eukaryotic cell contain?
What does the nucleus of a eukaryotic cell contain?
What is the main characteristic that distinguishes animal eukaryotic cells?
What is the main characteristic that distinguishes animal eukaryotic cells?
What is the composition of the Phospholipid Bilayer?
What is the composition of the Phospholipid Bilayer?
Where are the non-polar tails of phospholipids located in the membrane?
Where are the non-polar tails of phospholipids located in the membrane?
What is the function of cholesterol in the phospholipid bilayer?
What is the function of cholesterol in the phospholipid bilayer?
Where are glycolipids located in the membrane?
Where are glycolipids located in the membrane?
What are integral proteins also known as?
What are integral proteins also known as?
What is the function of transport proteins in the membrane?
What is the function of transport proteins in the membrane?
Where are glycolipids located in the phospholipid bilayer?
Where are glycolipids located in the phospholipid bilayer?
What is the function of cholesterol in the phospholipid bilayer?
What is the function of cholesterol in the phospholipid bilayer?
What are integral proteins also known as?
What are integral proteins also known as?
What is the main function of transport proteins in the membrane?
What is the main function of transport proteins in the membrane?
Where is protoplasm found in a cell?
Where is protoplasm found in a cell?
What is the composition of the Phospholipid Bilayer?
What is the composition of the Phospholipid Bilayer?
What joins molecules to take them from one side of the membrane to the other?
What joins molecules to take them from one side of the membrane to the other?
What forms a double layer with non-polar tails on the inside of the membrane?
What forms a double layer with non-polar tails on the inside of the membrane?
What is located in the spaces between unsaturated tails in a phospholipid bilayer?
What is located in the spaces between unsaturated tails in a phospholipid bilayer?
Which type of protein completely crosses the membrane?
Which type of protein completely crosses the membrane?
What is the main function of the cell membrane?
What is the main function of the cell membrane?
What distinguishes eukaryotic cells from prokaryotic cells?
What distinguishes eukaryotic cells from prokaryotic cells?
What happens when cells resembling each other group together?
What happens when cells resembling each other group together?
Where are glycolipids located in the cell membrane?
Where are glycolipids located in the cell membrane?
What is the composition of the Phospholipid Bilayer?
What is the composition of the Phospholipid Bilayer?
What is true about multicellular organisms?
What is true about multicellular organisms?
What is found inside a eukaryotic cell?
What is found inside a eukaryotic cell?
What is the role of organelles in eukaryotic cells?
What is the role of organelles in eukaryotic cells?
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Study Notes
Cell Structure and Function
- The cell membrane is semi-permeable, allowing certain substances to pass through while keeping others out.
Eukaryotic and Prokaryotic Cells
- Eukaryotic cells have a true nucleus and membrane-bound organelles, distinguishing them from prokaryotic cells.
- Prokaryotic cells lack a true nucleus and membrane-bound organelles.
Multicellular Organisms
- Multicellular organisms are composed of multiple cells that work together to form tissues and organs.
Eukaryotic Cell Structure
- Inside a eukaryotic cell, you can find a nucleus, organelles, and protoplasm.
- The nucleus contains genetic material.
Organelles and Cellular Function
- Organelles perform specific functions within the cell, such as protein synthesis, energy production, and waste management.
- Organelles are bound by a membrane and found within the eukaryotic cell.
Cell Membrane Composition
- The phospholipid bilayer is composed of a double layer of phospholipids, with polar heads facing outward and non-polar tails facing inward.
- The non-polar tails are located in the interior of the membrane.
- Cholesterol is embedded in the phospholipid bilayer, providing fluidity and flexibility.
- Glycolipids are located on the outer surface of the membrane.
Proteins and Cell Membrane Function
- Integral proteins, also known as transmembrane proteins, completely cross the membrane.
- Transport proteins facilitate the movement of molecules across the membrane.
Cellular Organization
- Protoplasm is the region of the cell where metabolic processes occur.
- When cells resembling each other group together, they form tissues.
Cell Membrane Function
- The cell membrane regulates the movement of molecules in and out of the cell.
- It also maintains the cell's shape and provides mechanical support.
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