Podcast
Questions and Answers
What does the fluid-mosaic model describe the plasma membrane to be?
What does the fluid-mosaic model describe the plasma membrane to be?
- Fluid and dynamic in structure (correct)
- Rigid and static in structure
- Impermeable to all molecules
- Composed of a single layer of phospholipids
What is the purpose of the phospholipid's polar phosphate-containing heads in the cell membrane?
What is the purpose of the phospholipid's polar phosphate-containing heads in the cell membrane?
- To face the extracellular fluid and cytoplasm, as they are hydrophilic (correct)
- To provide structural support to the membrane
- To create a hydrophobic barrier in the center of the membrane
- To anchor membrane proteins in the membrane
What is the purpose of the phospholipid's nonpolar fatty acid tails in the cell membrane?
What is the purpose of the phospholipid's nonpolar fatty acid tails in the cell membrane?
- To anchor membrane proteins in the membrane
- To create a hydrophilic barrier in the center of the membrane
- To provide structural support to the membrane
- To face the extracellular fluid and cytoplasm, as they are hydrophobic (correct)
What is the purpose of the double layer of phospholipids in the cell membrane?
What is the purpose of the double layer of phospholipids in the cell membrane?
What is the main function of the cell membrane?
What is the main function of the cell membrane?
What is the primary function of the cell membrane?
What is the primary function of the cell membrane?
Which of the following is NOT a key function of the nucleus?
Which of the following is NOT a key function of the nucleus?
What is the main purpose of the cytoplasm in a cell?
What is the main purpose of the cytoplasm in a cell?
Which of the following is NOT a key component of the cell membrane?
Which of the following is NOT a key component of the cell membrane?
What is the primary role of organelles in a cell?
What is the primary role of organelles in a cell?
Which of the following is NOT a key function of the cell membrane?
Which of the following is NOT a key function of the cell membrane?
What is the primary function of cilia?
What is the primary function of cilia?
Which of the following is an example of active membrane transport?
Which of the following is an example of active membrane transport?
What is the main difference between cilia and flagella?
What is the main difference between cilia and flagella?
What is the primary function of microvilli?
What is the primary function of microvilli?
Which of the following is an example of simple diffusion?
Which of the following is an example of simple diffusion?
What type of membrane transport allows small, uncharged molecules to pass through the phospholipid bilayer?
What type of membrane transport allows small, uncharged molecules to pass through the phospholipid bilayer?
What is the primary function of the cytoplasm?
What is the primary function of the cytoplasm?
Which organelle is responsible for producing proteins for the cell's own use?
Which organelle is responsible for producing proteins for the cell's own use?
What is the primary function of the smooth endoplasmic reticulum?
What is the primary function of the smooth endoplasmic reticulum?
Which organelle is responsible for collecting, modifying, packaging, and distributing proteins and lipids manufactured by the endoplasmic reticulum?
Which organelle is responsible for collecting, modifying, packaging, and distributing proteins and lipids manufactured by the endoplasmic reticulum?
What is the primary function of lysosomes?
What is the primary function of lysosomes?
Which organelle is primarily responsible for breaking down fatty acids, amino acids, and detoxifying hydrogen peroxide $H_2O_2$?
Which organelle is primarily responsible for breaking down fatty acids, amino acids, and detoxifying hydrogen peroxide $H_2O_2$?
What is the main difference between primary active transport and secondary active transport?
What is the main difference between primary active transport and secondary active transport?
What is the purpose of endocytosis and exocytosis in a cell?
What is the purpose of endocytosis and exocytosis in a cell?
What is the purpose of transcription and translation in gene expression?
What is the purpose of transcription and translation in gene expression?
What are the main stages of the cell cycle?
What are the main stages of the cell cycle?
What is the purpose of mitosis in the cell cycle?
What is the purpose of mitosis in the cell cycle?
What is the main function of the sodium-potassium pump in primary active transport?
What is the main function of the sodium-potassium pump in primary active transport?
What is the difference between leak channels and gated channels in cell membranes?
What is the difference between leak channels and gated channels in cell membranes?
What is the purpose of the cell cycle stages G1, S, and G2 in interphase?
What is the purpose of the cell cycle stages G1, S, and G2 in interphase?
What is the purpose of the cell cycle stage of cytokinesis?
What is the purpose of the cell cycle stage of cytokinesis?