AQA A LEVEL BIOLOGY QUESTIONS AND ANSWERS 100% PASS

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AQA A LEVEL BIOLOGY QUESTIONS AND ANSWERS 100% PASS the krebs cycle takes place in the _______ of the ___________ ✔✔matrix mitochondria epistasis ✔✔arises when the allele of one gene affect... s or masks the expression of another in the phenotype autosome ✔✔a chromosome that is not a sex chromosome biodiversity ✔✔the range and variety of genes, species and habitats within a particular region biomass ✔✔the total mass of living material, normally measured in a specific area over a given period of time intraspecific competition ✔✔competition between organisms of the same species interspecific competition ✔✔competition between organisms of different species krebs cycle ✔✔series of aerobic biochemical reactions in the matrix of the mitochondria of most eukaryotic cells by which energy is obtained through the oxidation of acetylcoenzyme A produced from the breakdown of glucose meiosis ✔✔the type of nuclear division in which the number of chromosomes is halved mutation ✔✔a sudden change in the amount or the arrangement of the genetic material in the cell NADP ✔✔a molecule that carries electrons produced in the light dependent reaction of photosynthesis selection ✔✔process that results in the best-adapted individuals in a population surviving to breed and so pass their favourable alleles to the next generation selection pressure ✔✔the environmental force altering the frequency of alleles in a population stroma ✔✔matrix of a chloroplast where the light-independent reaction of photosynthesis occurs substrate-level phosphorylation ✔✔the formation of ATP by the direct transfer of a phosphate group from a reactive intermediate to ADP stabilising selection ✔✔preserves the average phenotypes (ones around the mean) of a population by favouring average individuals. in other words, selection against the extreme phenotypes ✔✔ [Show More]

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