B4 0.0 / 5HideShow resource informationScienceProcesses of LifeGCSEOCRCreated by: zoeCreated on: 18-01-14 16:51 What two things do all cells contain? DNA and organelles 1 of 31 What does DNA contain and what form is it in? genetic code and double helix 2 of 31 What are organelles? the different part of the cells structure 3 of 31 What do organelles do? different jobs within the cell and work together to allow the cell to perform a specific function 4 of 31 What takes place in the cytoplasm? chemical reactions including anaerobic respiration, the production of enzymes and other protiens 5 of 31 What does mitochondria contain? the enzymes needed for anaerobic respiration 6 of 31 What is in the nucleus? the DNA that carries the genetic code for making enzymes and other proteins used in all chemical reactions in the cell 7 of 31 What does the cell membrane do? allows chemicals like gases and water to pass in and out freely but prevents other chemicals from leaving or entering the cell 8 of 31 What three extra things does a plant cell contain compared to human and animal cells? cell wall, permanent vacuole, chloroplasts 9 of 31 What is a cell wall made of and why? cellulose to strengthen the cell 10 of 31 What does a permanent vacuole do? helps support the cell 11 of 31 What do chloroplasts contain? chlorophyll which absorbs light energy and some enzymes needed for photosynthesis 12 of 31 What are enzymes? protein molecules that speed up the rate of chemical reactions in cells 13 of 31 What happens when the enzymes structure is permanently destroyed and it stops working? enzyme becomes denatured 14 of 31 When temperature is increased what happens in the frequency and energy of collisions between reactions and enzymes? increases 15 of 31 What three things happen once the enzyme and molecule are linked? reaction takes place, products are released, process starts again 16 of 31 What is the place called where the molecule fits into the enzyme? active site 17 of 31 What two factors can change the shape of the active site? heating the enzyme over a certain temperature, altering the pH level 18 of 31 What are the two types of respiration? aerobic and anaerobic 19 of 31 What is respiration? the release of energy from food chemicals in all living cells 20 of 31 What releases energy inside living cells by breaking down glucose and combining the products with oxygen? aerobic respiration 21 of 31 What releases energy inside the cytoplasm of living cells by breaking down glucose molecules without the use of oxygen? anaerobic respiration 22 of 31 What is active transport? the movement of a substance against a concentration gradient 23 of 31 What is the symbol equation for aerobic respiration? C6H12O6 + 602 ----> 6CO2 + 6H2O + energy released 24 of 31 What is the symbol equation for photosynthesis? 6CO2 + 6H20 (light energy) ----> (chlorophyll) C6H12O6 + 6O2 25 of 31 What 3 factors can limit the rate of photosynthesis? temperature, carbon dioxide concentration, light intensity 26 of 31 What is the overall movement of substances from regions of high concentration to regions of low concentration called? diffusion 27 of 31 What do plants need to absorb from the soil for healthy growth? nitrates 28 of 31 What is a quadrat? anything with a defined area 29 of 31 What is a transect? a random section across an area 30 of 31 What is the overall movement of water from a dilute solution to a more concentrated solution through a partially permeable membrane called? osmosis 31 of 31
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