Biology

Summary notes for biology gcse aqa respiration topic and structure of a leaf

Biology GCSE AQA revision summary notes including :the structure of leaves, plants,cells ,respiration , communicable diseases and non-communicable, plant diseases, vaccinations, monoclonal antibodies, developing drugs and defences against diseases.

pH scale above 7 - Ans .Base pH scale below 7 - Ans .Acid pH scale at 7 - Ans .Neutral how do you test pH - Ans .Phenol Red, or pH paper, or pH meters When using Biuret Reagent what do you test for? What color does it change if it has this? - Ans .test for the presence of proteins. Its initially blue and when added to a solution containing protein it turns purple or violet. When using benedicts reagent what do you test for? What color does it change if it has this? - Ans .used to test f...

Understand how living organisms share the following characteristics: • they require nutrition • they respire • they excrete their waste • they respond to their surroundings • they move • they control their internal conditions • they reproduce • they grow and develop - Ans . Describe the common features shown by eukaryotic organisms: plants, animals, fungi and protoctists are they multicellular? do they have chloroplasts? do they have cell walls? do (and if so...

2010 TZ1 2. (a) Glucose and galactose are examples of monosaccharides. State one other example of a monosaccharide. (b) The equation below shows the production of glucose and galactose from lactose. (i) There are several different types of carbohydrates. State which type of carbohydrate lactose is. (ii) State the type of chemical reaction that occurs when lactose is digested into glucose and galactose. (c) Lactase is widely used in food processing. Explain three reasons for converting lac...

Gametes are formed in sexual reproduction. Name the male gamete formed in flowering plants. pollen grain Earthworms: • live in soil • feed on dead and decaying plant matter • have soft, moist skin • exchange gases through their skin. Give two abiotic factors and two biotic factors that could affect the size of an earthworm population. Abiotic: • water • oxygen in soil Biotic: • food • predators Explain the effect a high concentration of insulin has on blood glucose ...

What is the genus of the fungus? - Ans .Ourasphaira Describe two ways to increase biodiversity in the UK - Ans .Plant trees Regenerate habitats Fungi are not in the domain Archaea Which domain are fungi classified in? - Ans .Eukaryotic What is evolution? - Ans .The process by which living things can gradually change over time. Explain how the effect of adrenaline on heart rate might cause reaction time to decrease? - Ans ..Heart rate increases .Increase in glucose and oxygen to the brain...

On the diagram, label the aorta (1 mark) On the diagram, label the right artium (1 mark) Explain how valves control the flow of blood through the heart (2 marks) - valves open and close in response to changes in blood pressure/heart contraction/pumping - valve prevents backflow/maintains direction of blood flow - valves allow heart chambers to fill/to empty outline the causes and consequences of blood clot formation in coronary arteries (2 marks) - coronary heart disease/CHD/coronary ...

Suggest why it was not appropriate to estimate the number of Jaguars using the capture-recapture technique (2) - Ans .Estimate will be inaccurate because it is a low number. Dangerous for collector. Most studies estimate the population density of Jaguars South American rainforest to be 5 individuals per 100km2. In the 2007 study: • 100 camera traps were set up covering an area of 271 km2. • 28 images of 9 different jaguars were recorded. How well do these results support a populati...

Define polygenetic inheritance - Ans .more than one gene for a single characteristic at a different loci integration of of many genes on more than one locus - continuous variation - cumulative effect of genes How does one gene code for many different proteins - Ans .-Transcription -splicing of pre RNA -Spliceosome -removal of introns -exons are arranged in a different order -mRNA is different -translation -different primary sequence of amino acids -different bonds Define geneti...