Paper 3 biology aqa paper 2023 questions with complete solutions.

Paper 3 biology aqa paper 2023 questions with complete solutions. Describe uhow upacing ucorpuscle uproduces ugenerator upotential 3 umarks u- u u u ucorrect uanswer.Stretch umediated usodium uion uchannels, Sodium uchannels uopen, Sodium uions udiffuse uin All uor unothing uprinciple 2 umarks u- u u u ucorrect uanswer.Action upotential uonly ugenerated uwhen uthreshold uis ureached u, High upressure uis uabove ustimulus, Time uperiod ubetween u0.6 uand u4.0 1 umark u- u u u ucorrect uanswer.Refractory uperiod Two uvariable uto ucontrol uin urespiration uyeast uexperiment 1 umark u- u u u ucorrect uanswer.Mass uof uglucose, Mass uof uyeast Yeast urate uof uco2 uproduction u 2 umarks u- u u u ucorrect uanswer.2.5 ux10-2 Why uwas uyeast uslower uin umaltose uover uglucose u 2 umarks u- u u u ucorrect uanswer.Maltose uis udissaccharide, Hydrolysed uinto uglucose Method uof urespiration uless uaccurate ubecause? uThis ucould ube uimproved uby- 2 umarks u- u u u ucorrect uanswer.Less uaccurate u- ucolour uis usubjective Improved uby u- uhave ua ucolour ustandard uof uthe uyellow uas ua ureference ufor uthe uend upoint Link ureaction u, uA uB uC uD 2 umarks u- u u u ucorrect uanswer.A-Pyruvate B-NADH C-Coenzyme uA D-acetylcoenzyme uA Prokaryote utick ubox u 1 umark u- u u u ucorrect uanswer.Second uBox Mean uno uof ubacteria uin uculture u- u u u ucorrect uanswer.9.144x u10 uto upower uof u8 Log uquestion uto ubacteria uone 1 umark u- u u u ucorrect uanswer.30 ugeneration Two ureasons uwhy ubacteria ucould ugrow uin uculture ucontaining uchloramphenicol 2 umarks u- u u u ucorrect uanswer.Concentration uwas utoo ulow uto ukill uall, Mutation How uis uSCFR udestroyed uby ulysosome 2 umarks u- u u u ucorrect uanswer.Vesicle ubinds uwith ua ulysosome, Lysosomes udigest uSCFR Diversity uof ufish uformula uyears uvalue u 1 umarks u- u u u ucorrect uanswer.1982 uand u2003 Describe uand uexplain u1997 uresults 2 umarks u- u u u ucorrect uanswer.1997 uhad uhighest uno uof uspecies, However ufew uspecies uwere upresent uin uvery ularge unumbers Why ujournalist uconclusion uon upower ustation umight unot ube uvalid u 4 umarks u- u u u ucorrect uanswer.Species urichness ulower uafter u29 uyears, Data uonly ufor uone ufish ucommunity, Other ucommunities umay uhave udifferent ufish uspecies, Volume uof uheated uwater umay uof uvaried Two utypes uof ucell uthat ucan ustimulate uimmune uresponse 2 umarks u- u u u ucorrect uanswer.Pathogens, Abnormal ubody ucells Why uolive uoil uapplied uto uleft uear uof uthe umice u 1 umark u- u u u ucorrect uanswer.As ucontrol uexperiment uto ushow uits uOXA uaffecting uimmune uresponse