AQA A LEVEL BIOLOGY Study guides, Class notes & Summaries

AQA A-level BIOLOGY 7402/1 Paper 1 Version: 1.0 Final Question Paper & Mark scheme [MERGED] June 2023

AQA A- LEVEL BIOLOGY PAPER 1 WITH 100 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)| NEWEST 2024| ALREADY GRADED A+

AQA A level Biology Revision Questions And Answers A+ Graded

AQA A LEVEL BIOLOGY EXAM/17 QUESTIONS AND ANSWERS

AQA A-Level Biology: Paper 1 2021/31 questions and answers

ecology - Answer the study of interrelationships between organisms and their environment environment - Answer includes both abiotic and biotic factors biotic factors - Answer living factors abiotic factors - Answer non-living factors biosphere - Answer the space where an organism inhabits ecosystem - Answer all the living and nonliving components of a particular area population - Answer a group of individuals of the same species that occupy the same habitat...

A mutation is - Answer A change to the quantity or structure of the DNA of an organism which can result in a different amino acid sequence in the encoded polypeptide A gene mutation is - Answer A change or rearrangement to one or more nucleotide bases in DNA During DNA replication - Answer Gene mutations might arise Different types of gene mutations - Answer Addition, deletion, substitution, inversion, duplication and translocation of bases Addition mutations are - An...

Transcription - Answer helix unzips by DNA polymerase Strands separate, acts as template Free RNA nucleotides attach to completmentary base Phosphate bonds form Pre-MRNA detaches Splicing=removes introns-non coding Translation - Answer Ribosome attaches to start condon TRNA with complementary anticodon pairs with mRNA tRNA releases amino acid forming a peptide bond then tRNA is released back to cytoplasm Peptide chain formed, release into the cell DNA, Chromosomes and Genes - ...

What is photosynthesis? - Answer Occurs ONLY in plants. The plant makes glucose from light, carbon dioxide and water What is the equation for photosynthesis? - Answer 6CO2 + 6H2O -> C6H12O6 + 6O2 How is energy stored in plants? - Answer In the glucose until plants release it by respiration What is a metabolic pathway? - Answer A series of reactions that are catalyzed by different enzymes and result in one or more products - photosynthesis What is aerobic respiratio...

Self Cells - Answer The body's own cells and molecules Non-Self Cells - Answer Foreign cells and molecules invading someone Non Specific Defense - Answer A bodily response that is immediate and applies to all pathogens entering the body Specific Defense - Answer A slower bodily response that is specific based on each pathogen entering the body Cellular Response - Answer Involves T lymphocytes and only occurs in cells Humoral Response - Answer Involve...