Unit 2 the - Study guides, Revision notes & Summaries

a full summary of everything you need to know for AQA A level biology unit 2, from a variety of sources including textbooks, class notes and above all the exact AQA specification and past mark schemes to give you the information you need to get the marks.

AQA AS BUSINESS Paper 1 Business 1 Friday 19 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the box at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at th...

AQA A-level ACCOUNTING Paper 2 Accounting for analysis and decision-making Tuesday 6 June 2023 Morning Time allowed: 3 hours Materials For this paper you must have: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your a...

AQA AS PHYSICS Paper 2 Wednesday 24 May 2023 Afternoon Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. Time allowed: 1 hour 30 minutes You are advised to spend about 35 minutes on Section C • You must answer the questions in the spaces pro...

Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. (5 marks) [Unit 1, June 16] : 1. Na+ ions leave epithelial cell and enter blood; 2. (Transport out is by) active transport / pump / via carrier protein using ATP; 3. So, Na+ conc. in cell is lower than in lumen (of gut); 4. Sodium/Na+ ions enter by FACILITATED diffusion; 5. Glucose absorbed with Na+ ions a...

Current : Rate of flow of charge Coulomb : The amount of charge passing a point when a current of 1A flows for 1s Potential difference : The work done per unit charge in moving a small point positive charge between two points Threshold Voltage for a Diode : The voltage at which a current will begin to flow at, assumed to be +0.6V if not stated Reverse Bias : When very little currency can flow in the reverse direction of a diode 2 | P a g e Variable Resistor : Can be used to chang...

adjacency pair : unit of conversation that contains an exchange of one turn each by two speakers syntactic error : the inaccurate arrangement on words in a sentence e.g 'the Palais de Tokyo has great stuff always' (conversational) repair : marked by a hesitation in speech where the speaker changes topic or ameliorates the situation stress : emphasis on a word or phrase by sound empty subject : the personal pronoun from the start of a sentence is missing (e.g came up to the house... ...

Explain how the structure of DNA is related to its functions (6 marks) - answer-- sugar-phosphate (backbone)/double stranded/helix so provides strength/stability/protects bases/protects hydrogen bonds - long/large molecule so can store lots of information - helix/coiled so compact - base sequence allows information to be stored/ base sequence codes for amino acids/protein - double stranded so replication can occur semi-conservatively/strands can act as templates/complementary base pairing/A-...

AQA AS BUSINESS Paper 1 Business 1 Friday 19 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the box at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at th...

AQA A-level ACCOUNTING Paper 2 Accounting for analysis and decision-making Tuesday 6 June 2023 Morning Time allowed: 3 hours Materials For this paper you must have: • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your a...