|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?
|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
Image: download (image/jpg)
|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?
|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?
|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