aqa biology exam style questions
aqa biology exam style questions . Explain how cellulose gives cotton its strength. - straight/unbranched chains; (idea of more than 1) chains lie side by side / form (micro)fibrils; idea of H bonds holding chains together; (1) (b) Describe how new viruses are produced after HIV has infected a T cell. - DNA copy made (of viral RNA); Inserted into host DNA / chromosomes; (Uses viral DNA to) make viral proteins/particles; Makes viral RNA; (Host) cell makes new viruses; "Budding off" / wrapped in cell membrane; Accept reverse transcriptase makes DNA for 2 marks in correct context; (2) (ii) Describe how the Golgi apparatus is involved in the secretion of enzymes.
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