970671
Description
Flashcards by blairzy123, updated more than 1 year ago
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Created by blairzy123
over 11 years ago
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| Question | Answer |
| What is the function of: the nucleus | contains DNA (the instructions for making proteins) |
| What is the function of: the cyptoplasm | gel like substance where proteins (like enzymes) are made |
| What is the function of: cell membrane | holds the cell together and controls what enters and leaves the cell |
| What is the function of: mitochondria | Where the enzymes needed for reactions of aerobic respiration are found |
| Name 3 things that plant cells have that animal cells do and give their function. | Cell wall- supports and strengthens the cell Vacuole- contains cell sap, a weak solution of sugar and salts Chloroplasts - where the reactions for photosynthesis occur |
| Yeast cells have mitochondria and a nucleus. True or False? | True |
| What type of cells have a cell wall but no nucleus? | Bacterial cells (instead they have a circular molecule of DNA floating within the cytoplasm) |
| Give a definition of an enzyme | Enzymes are proteins produced by living things that help speed up chemical reactions |
| Describe the lock and key model |
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| Name two things that effect how an enzyme works | Temperature and pH |
| What is a denatured enzyme? | where the bonds in the active site break and change shape, so that the substrate no longer fits |
| Name three things that energy from respiration is used for | Movement Active transport Synthesis of larger molecules |
| What type of respiration, aerobic or anaerobic releases more energy per glucose molecule? | aerobic respiration |
| Write the word equation for aerobic respiration | glucose+oxygen -> carbon dioxide+water+energy |
| Write the symbol equation for aerobic respiration | C6H12O6 +6O2 = 6CO2 + 6H2O + energy |
| Give an example of when humans respire anaerobically | during vigorous exercise (when the body can't supply oxygen to the muscles for aerobic respiration) |
| Anaerobic respiration releases energy. What else does it release in: Animal cells? | Lactic acid |
| Anaerobic respiration releases energy. What else does it release in: Yeast cells? | Ethanol and Carbon Dioxide |
| Briefly describe how bread is made using yeast. | The yeast ferments the carbohydrates in the bread and release CO2 and cause the bread to rise |
| Briefly describe the process of photosynthesis | Photosynthesis is a series of chemical reactions that uses energy from sunlight to produce food |
| Write the word equation for photosynthesis | Carbon dioxide + Water -> Glucose + Oxygen |
| Write the symbol equation for photosynthesis | 6CO2+6H2O = C6H12O6+6O2 |
| Give three main ways in which plants use glucose | Respiration Chemicals in growth Stored as starch |
| Name three factors that can effect the rate of photosynthesis | Light Carbon Dioxide Temperature |
| Describe how to take a transect | Run a tape measure between two points Start at one end, collecting the data you want, then move along the transect and collect data you want |
| Describe how you might use a quadrat when investigating plants | It helps you estimate the percentage cover of a plant species on the ground, by counting how much of the quadrat is covered by the species |
| What's an identification key? | A series of questions you can use to try and figure out what a plant is |
| Give a definition of diffusion | The passive overall movement of particles from a region of high concentration to a region of low concentration |
| Give two examples of chemicals that can move in or out of leaf cells by diffusion | CO2 taken in for photosynthesis O2 excreted in photosynthesis |
| What is osmosis? | The overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane |
| Give two ways in which active transport differs from diffusion | It requires energy It moves particles from a low concentration to a higher concentration |
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