AQA A Level Study guides, Class notes & Summaries

AQA A-level Biology Paper 1 Test || All Questions & Answers (100% Correct) AQA A-level Biology Paper 1 Test || All Questions & Answers (100% Correct) large molecules often contain carbon. why? - ANSWER - they can readily form bonds with other carbon atoms. this forms a 'backbone'. other atoms can then attach. describe benedicts test for reducing sugars - ANSWER - add equal volumes of the sugar sample and benedicts reagent. heat the mixture in a water bath for 5 minutes. brick red prec...

AQA A level Biology Exam || Revision Questions & Answers (Graded A+) AQA A level Biology Exam || Revision Questions & Answers (Graded A+) Describe how you would use a biochemical test to show that a solution contained a non-reducing sugar, such as sucrose. [3] - ANSWER - ,first reducing sugars test; boil with dilute HCl acid then Neutralise with NaHCǑ, add benedict and heat to 95 degrees C brick red ppt forms if reducing sugar is present Describe a chemical test you could carry out to sh...

Describe the role of a ribosome in the production of a polypeptide. /3 - Correct answer1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of glycogen. /2 - Correct answer-1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure; NHE3 actively transp...

Describe the role of a ribosome in the production of a polypeptide. /3 - Correct answer1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of glycogen. /2 - Correct answer-1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure; NHE3 actively transp...

Behavioural Panic, in response to a stimulus people may freeze of scream and run away. Avoidance, people will often avoid facing their fears which can make it difficult to go out and about. Endurance, the opposite of avoidance where the sufferer takes it and endures it. Emotional Anxiety, phobias are classified as anxiety disorders, this prevents relaxation and makes it difficult to feel positive emotions. Unreasonable emotional responses, the emotional response we have is much to over t...

AQA A-Level Business-Unit 7, PESTLE Exam with Questions and Answers PESTLE ANSWER Political Economic Social Technological Legal Environmental Political Environment ANSWER comprises of actions taken by local, national or international authorities that affect the activities of businesses (YEAR 1) (POLITICAL) Factors influenced by Political Environement ANSWER - encouraging enterprises - developing infrastructure - regulating markets - environmental issues (DEFRA - Department for...

AQA A LEVEL PSYCHOLOGY TEST WITH ALL ANSWERS - YEAR 1

AQA A-Level business paper 1 revision Questions And Detailed Rationales Answers Why businesses exist - Can make you money and you can be your own boss Mission - a business aim expressed to make it seem especially purposeful and motivating Objectives - SMART Specific, Measurable, Achievable, Realistic, Time-bound Why businesses set objectives - - it is motivating to have a goal to aim toward - as a boss you can not make every decision Profit - Revenue - tot...

1. What is meant by work function (2): Minimum energy required by an electron to escape from (1) a metal surface (1) 2. What is meant by ionisation energy? (2): Minimum energy required to remove an electron from an atom (1) from the ground state (1) 3. Why do emitted electrons have a kinetic energy that varies up to a maxi- mum value? (4): Energy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below the surface of the me...