AQA AS BIOLOGY Paper 1 QP 2021

AQA AS BIOLOGY PAPER 1 QP 2021


1.Question g1.2:
ANS>> g1489
method g(4.38x10^3 g/ g5) gx g1.7= g1489

2.Two gdifferences gbetween gtRNA gand gmRNA gstructure:
g g gANS>> g gtRNA ghas gamino gacid gbinding gsite, gmRNA gdoesn't

tRNA ghas ganticodon, gmRNA ghas gcodon

3.Difference gin gmRNA gand gpre-mRNA:
g g g gANS>> g gmRNA ghas gfewer gnucleotides gdue gto gsplic- ging



4.Structures gA gand gB gof gHIV:
g g g g gANS>> g gA= gAttatchment gprotein gB=

gcapsid



5.How gHIV gis greplicated: g
g g g g gANS>> gAttachment gproteins gattach gto greceptors gon ghelper gT gcells,

gRna genters gcell, greverse gtranscriptase gconverts gRNA gto gDNA,

genzymes gproduced, gvirus gparticles gassembled gand greleased



6.Name gone gorganelle ginn gdigesting gthese gbacteria g(U. gmarinum gcells):
g g g g gANS>> g gLyso- gsomes gfuse gwith gvesicle, greleases ghydrolytic

genzymes



7.question g3.3: g
g g gANS>> g g32, gActual=image/magnification



8.Describe gand gexplain gthe garrangment gof ggenetic gmaterial gin gfigure g4
g(during gprophase):

g g g g g g gANS>> g gChromosomes gare gnot glined gup gbecause gno gspindle

gactivity



9.4.2 gquestion: g
g g g gANS>> gA



10.Fixed gposition goccupied gby ggene gon gDNA gmolecule:
g gANS>> gLocus

1 g/
g4