2024 aqa as biology 7401/2 paper 2 with 150 questions and correct detailed answers (verified answers) |already graded a+|| brand new!!

2024 aqa as biology 7401/2 paper 2 with 150 questions and correct detailed answers (verified answers) |already graded a+|| brand new!! Compare and contrast the DNA in eukaryotic cells with the DNA in prokaryotic cells -answer-Comparisons 1. Nucleotide structure is identical; 2. Nucleotides joined by phosphodiester bond; OR Deoxyribose joined to phosphate (in sugar, phosphate backbone); 3. DNA in mitochondria / chloroplasts same / similar (structure) to DNA in prokaryotes Contrasts 4. Eukaryotic DNA is longer; 5. Eukaryotic DNA contain introns, prokaryotic DNA does not; 6. Eukaryotic DNA is linear, prokaryotic DNA is circular; 7. Eukaryotic DNA is associated with / bound to protein / histones, prokaryotic DNA is not Haemoglobins are chemically similar molecules found in many different species. Differences in the primary structure of haemoglobin molecules can provide evidence of phylogenetic (evolutionary) relationships between species. Explain how - answer-1. Mutations change base / nucleotide (sequence); 2. (Causing) change in amino acid sequence; 3. Mutations build up over time; 4. More mutations / more differences (in amino acid / base / nucleotide sequence / primary structure) between distantly related species; OR Few(er) mutations / differences (in amino acid / base / nucleotide sequence / primary structure) in closely related species; 5. Distantly related species have earlier common ancestor; OR Closely related species have recent common ancestor Explain why students were unable to make a conclusion from the table? -answer--missing information -so cannot compare all stages -no statistical comparison of standard deviations given or no measure of significant differences