AQA A level Biology Bundled Exams Questions and Answers with Verified Solutions

AQA AS level biology questions and answers already passed What are the three ways a pathogen can damage hosts cells? 1) rupturing them to release nutrients inside them 2) breaking down nutrients inside the cell for their own use. This starves and eventually kills the cell. 3) replicating inside the ...

AQA A level Biology Revision Questions and Answers 100% Pass Describe how you would use a biochemical test to show that a solution contained a non-reducing sugar, such as sucrose. [3] ,first reducing sugars test; boil with dilute HCl acid then Neutralise with NaHCǑ, add benedict and heat to 95 deg...

AQA AS LEVEL BIOLOGY QUESTIONS AND ANSWERS WITH CERTIFIED SOLUTIONS what is RNA? ribonucleic acid MRNA and TRNA single stranded shorter AU CG what are biological molecules? molecules made and used by living organisms eg. lipids, carbs, DNA, AT, water, inorganic ions what are the functions of carbo...

AQA A-Level Biology (new spec) Unit 1A - Biological Molecules Latest 2023 Graded A+ Monomers Small basic molecular units Examples of monomers monosaccharides, amino acids and nucleotides Polymers Large complex molecules composed of long chains of monomers joined together Examples of polymers Carb...

AQA A-Level Biology – Proteins Latest 2023 Amino Acid A monomer that will join with other amino acids to form a protein Dipeptide Two amino acids bonded together via a peptide bond Polypeptide Many amino acids bonded together via peptide bonds Protein A combination of polypeptides Amine Group ...

AQA A-level Biology paper 1 Questions and Answers Graded A+ large molecules often contain carbon. why? they can readily form bonds with other carbon atoms. this forms a 'backbone'. other atoms can then attach. describe benedicts test for reducing sugars add equal volumes of the sugar sample and b...

AQA A-Level Biology Topic 1: Biological Molecules (2022/2023) Already Passed What are monomers? Monomers are *small units* which are the components of larger molecules. What are polymers? Polymers are molecules made from *many monomers* joined together. What are examples of monomers? *Monosacchari...

AQA A Level Biology Unit 1 Questions and Answers Rated A+ How do biological molecules provide evidence for evolution? They all have similar molecules and use the same amino acids and DNA. What are monomers of carbohydrates called? Monosaccharides. Beta Glucose Alpha glucose Glucose formula C₆...

AQA A-Level Biology – Enzymes Questions and Answers 100% Pass Activation Energy The minimum energy required for successful collisions to result in a reaction Enzyme Function Lowers the activation energy for a reaction to start, behaves as a catalyst Enzyme Structure Globular proteins that have ...

AQA A-Level Biology. 3.2 – Cells Questions and Answers Already Passed Structure of Nucleus. 1. Nuclear envelope: double membrane surrounding nucleus, outer membrane continuous with the (R)ER of the cell. 2. Nuclear pores: allow the passage of larger molecules, such as mRNA, out of the nucleus. 3...

Biology AQA A level common questions latest 2023 with complete solutions give two factors other than age and gender that would affect the concentration of creatinine in the blood ? muscle/ body mass ethnicity Explain how the cells of the collecting duct are able to absorb water from the filtrate t...

AQA A Level Biology 4/5/6 mark questions (2022/2023) (Certified Answers) Many different substances enter and leave a cell by crossing its cell surface membrane. Describe how substances can cross a cell surface membrane. (5) 1 (Simple / facilitated) diffusion from high to low concentration / down co...

AQA A level Biology topic 7 Latest 2023 Graded A+ What is a dominant allele? Allele which is always expressed in the phenotype even when theres only one copy of it What are recessive alleles? Alleges that only appear in the phenotype if 2 copies are present What are codominant alleles? Alleles tha...

AQA A-Level Biology - Topic 3 (2022/2023) with Verified Answers Smaller organisms have a ........... surface area to volume ratio Higher How do single called organisms exchange substances? Diffuse directly into or out of the cell across the cell surface membrane Give 2 reasons why in multicellular...