Podcast
Questions and Answers
How does the complementary nature of photosynthesis and cellular respiration contribute to energy cycling in ecosystems?
How does the complementary nature of photosynthesis and cellular respiration contribute to energy cycling in ecosystems?
- Photosynthesis breaks down glucose to release energy, while cellular respiration synthesizes glucose using energy from sunlight.
- Photosynthesis produces oxygen used in cellular respiration, while cellular respiration produces carbon dioxide used in photosynthesis. (correct)
- Photosynthesis occurs in animals, while cellular respiration occurs in plants, creating a balanced energy flow.
- Photosynthesis and cellular respiration both produce ATP as their primary product, leading to a net gain of energy.
Which component of the fluid mosaic model is most directly responsible for maintaining membrane fluidity at low temperatures?
Which component of the fluid mosaic model is most directly responsible for maintaining membrane fluidity at low temperatures?
- Peripheral proteins
- Cholesterol (correct)
- Integral proteins
- Phospholipids with saturated fatty acid tails
A researcher observes that a particular molecule readily crosses a cell membrane down its concentration gradient, but only when a specific transmembrane protein is present. This transport is most likely an example of what?
A researcher observes that a particular molecule readily crosses a cell membrane down its concentration gradient, but only when a specific transmembrane protein is present. This transport is most likely an example of what?
- Active transport
- Osmosis
- Facilitated diffusion (correct)
- Simple diffusion
A cell is placed in a hypertonic solution. What will most likely happen to the cell?
A cell is placed in a hypertonic solution. What will most likely happen to the cell?
Which transport mechanism is responsible for moving large particles, such as bacteria, into a cell?
Which transport mechanism is responsible for moving large particles, such as bacteria, into a cell?
Flashcards
Phospholipid Bilayer
Phospholipid Bilayer
A double layer of phospholipids that forms the basic structure of cell membranes.
Diffusion
Diffusion
The movement of molecules from an area of higher concentration to an area of lower concentration.
Osmosis
Osmosis
The diffusion of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
Facilitated Diffusion
Facilitated Diffusion
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Concentration Gradient
Concentration Gradient
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Study Notes
- The cell and its organelles are key topics.
Photosynthesis & Cellular Respiration
- Covered topics include the organelles and parts involved.
- Equations for each process are important.
- Focus on the main stages of each reaction.
- Understand what it means for these processes to be complementary.
Fluid Mosaic Model
- The phospholipid bilayer is a major component.
- You should know the different components, and their roles.
Transport Mechanisms
- Differences between active and passive transport.
- Focus on diffusion, osmosis, and facilitated diffusion.
- Channel and carrier proteins are important to consider.
- Protein pumps facilitate transport.
- Bulk transport includes endocytosis (phagocytosis and pinocytosis) and exocytosis.
- You should understand what a concentration gradient is.
- Hypertonic, hypotonic, and isotonic solutions are important.
- You should cover permeability and factors affecting it.
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Description
Explore cellular processes including photosynthesis and cellular respiration, their equations, and complementary nature. Learn the fluid mosaic model, phospholipid bilayer, and transport mechanisms like diffusion, osmosis, and active/passive transport. Understand concentration gradients and solution types.
