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AQA AS level biology exam questions with answers

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AQA AS LEVEL BIOLOGY TEST PAPERS 2025/2026 QUESTIONS WITH ANSWERS GRADED A+

community - all the living organisms present in an ecosystem at a given time complementary DNA - DNA that is made from mRNA in a process that is the reverse of normal transcription condensation - chemical process in which 2 molecules combine to form a more complex 1 with the elimination of a simple substance, usually water. continuous variation - variation in which organisms do not fall into distinct categories but show graduations from one extreme to the other coronary arteries - arterie...

properties of starch and glycogen as energy stores? - -insoluble, doesn't affect water potential, cell won't shrink or burst -coiled, compact, fits inside cells better -branched/chained, easy to break down, glucose removed from the end endoplasmic reticulum? - rough- has ribosomes ,protein synthesis, process and package smooth- makes lipids and carbs golgi apparatus? - processes and packages proteins into vesicles digestive enzymes placed into lysozomes, vesicles with membranes s...

chloroplast structure? - absorbs light energy for photosynthesis to produce glucose double membrane thylakoid disks stack into granum thylakoid surrounded by stroma fluid large surface area test for reducing sugars - heat with benedicts, turns brick red vacuole - surrounded by membrane called tonoplast contains cell sap keeps cell turgid pushes chloroplasts to surface test for non reducing sugar? - -heat with benedicts, no change -add dilute hcl (hydrolyses glycosidic bond) -add sod...

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