B4 revision cards 0.0 / 5 ? BiologyB4GCSEOCR Created by: ani._xCreated on: 29-03-17 19:17 Name 3 things that plant cells have and animals cells don't? Cell wall, Valcuole, Chloroplasts 1 of 20 Yeast cells have mitochondria and a nucleas. True or false? True 2 of 20 What type of cells have a cell wall but no nucleas? Bacteria. 3 of 20 What is the definition for an enzyme? They are proteins produced by living things 4 of 20 Describe the "lock" and "key" model? Key = substrate. Lock = enzyme. The correct fit will react. The incorrect substrate will produce no reaction 5 of 20 Name two things that affect how quickly an enzyme works? Right tempreture and optimum PH 6 of 20 Name two things that energy released by respiration is used for? Movement and large molecules 7 of 20 What type of respiration"areobic" or "anerobic" produces more energy per glucose molecule? Aerobic produces more energy per glucose molecule than Anerobic. 8 of 20 What is the word equation for Aerobic respiration? Glucose + oxygen - carbon dioxide+water 9 of 20 Give an example of when human cells respire anaerobically? Starch and celluose 10 of 20 Anaerobic respiration releases energy. What else does it produce in animal cells and yeast cells. Animal cells- lactic acid. Yeast cells- alcohol and bread. 11 of 20 Describe how bread is made using yeast? Yeast ferment that carbohydrates in flour. This releases carbon dioxide and makes the bread rise. 12 of 20 What happens during photosynthesis? Its a series of chemical reactions that uses energy from sunlight and produces food. 13 of 20 What is the word equation for photosynthesis? Carbon dioxide+water-glucose +oxygen 14 of 20 Give three main ways plants use glucose? Respiration, chemicals for growth, starch 15 of 20 Name three factors that can limit the rate of photosynthesis? 1. Amount of light. 2. Carbon dioxide level 3.Tempreture 16 of 20 Describe how to take a transect? You run a tape measure through two fixed points. You start at one end and collect the data you want 17 of 20 What is an identification key? A bunch of questions that you can use to figure out what a plant is 18 of 20 What is diffusion? It is the steady movement of particles where there are lots of them to places where there are fewer. e.g. when you spray perfume 19 of 20 What is osmosis? It's a passive movement of water molecules from an area of higher concentration to lower concentration. 20 of 20
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