AQA A-level Biology Paper 1 2021 FF

AQA A-level Biology Paper 1 2021 FF Explain the advantage for larger animals of having a specialised system that facilitates oxygen uptake. x2 - Correct Answer 1- lower surface area to volume ratio 2- overcomes large diffusion distance Suggest how the environmental conditions have resulted in adaptations of systems using Model A rather than Model B. x2 - Correct Answer 1- there's a lower concentration of oxygen in the water 2- provides a larger surface area Suggest 2 ways the student could improve the quality of his scientific drawing. x2 - Correct Answer 1- draw continuous lines 2- add the magnification Give one feature of the chloroplast that allows protein to be synthesised inside the chloroplast and describe one difference between this feature in the chloroplast and similar features in the rest of the cell. x2 - Correct Answer 1- ribosomes in the chloroplast are smaller than the ones in the cytoplasm 2- 70s vs 80s Suggest 2 further investigations that should be done before drugs can be used on humans. x2 - Correct Answer 1- test drugs on humans to see side effects 2- use different concentrations of the drug to find suitable dosage Describe how triglycerides are formed. x3 - Correct Answer 1- three fatty acids and one glycerol molecule 2- condensation reaction with removal of 3 water molecules 3- formation of ester binds Explain why a data logger was used to measure the length of the root time rather than a ruler. - Correct Answer 1- provides a larger resolution b