Aqa respiration Study guides, Revision notes & Summaries

AQA GCSE Biology Paper 1 Topics 1-4 Name the main organelles in an animal cell: ️> nucleus > cytoplasm > cell membrane > ribosomes > mitochondria What organelles does a plant cell have but animal cell doesn't? ️> chloroplast > cell wall > vacuole What organelles does a Bacteria cell have? ️> no nucleus > circular strand of DNA > rings of plasmid > cell wall > cell membrane What is a eukaryotic cell? ️A cell that c...

AQA GCSE BIOLOGY - PAPER 1 EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRADEA+ What does a nucleus do? Correct Answer: It contains genetic material and controls the activities of the cell What does a nucleus do? Correct Answer: It contains genetic material and controls the activities of the cell What does cytoplasm do? Correct Answer: It's a gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical react...

AQA GCSE Biology (9-1) - Paper 1 Verified Solutions What are the two types of microscopes? ️Light Microscope Electron Microscope What is the magnifying power of a light microscope? ️x 2,000 What is the magnifying power of an electron microscope? ️x 2,000,000 What is the resolving power? ️The ability to distinguish between two separate points What is the resolving power of light microscopes? ️200 nm What is the resolving power of electron microscopes? ️0.2 nm What are ...

AQA AS Biology EXAM Past Papers FREQUENT QUESTIONS AND ANSWERS The scientists used a transmission electron microscope to study the structure of the amoeba. Explain why 2 marks - ANSWER 1. High/ better resolution; 2. Shorter wavelength; 3. To see internal structures/ organelles/named organelles; Describe the relationship between increasing the number of alcoholic drinks per day and the risk of heart disease in investigation A. 2 marks decreases and increases after 2 drinks - ANS...

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. Nucleoplasm: granular, jelly-like material making up the bulk of the nucleus. 4. Chromosomes: protein-bound, linear DNA. 5. Nucleolus: small spherical region(s) in nucleoplasm. Manufactures riboso...

AQA A LEVEL RESPIRATION EXAM QUESTIONS WITH ANSWERS VERIFIED. Suggest the advantages of the change in blood flow in blood vessels during exercise. [3 marks] -more blood flow to muscles during exercise -supplying more glucose and oxygen/ removing carbon dioxide/ lactic acid/ heat -for high rate of respiration/ to meet increased demand for energy Explain how microorganisms contributed to the increase in temperature during processing of organic waste. [2 marks] respiration produces heat ex...

AQA A-level BIOLOGY 7402/3 Paper 3 Version: 1.0 Final *jun* IB/M/Jun23/E12 7402/3 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 TOTAL Wednesday 21 June 2023 Morning Time allowed: 2 hours Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions in Section A. • Answer one question from S...

2023 AQA GCSE BIOLOGY 8461/1F Paper 1 Foundation Tier Question Paper & F Mark scheme (Merged) June 2023 [VERIFIED] GCSE BIOLOGY Foundation Tier Paper 1F Tuesday 16 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provid...

AQA Biology A-Level Paper 2 Already Rated A+ describe and explain the steps in the light dependent reaction of photosynthesis 1. photoionisation: light reaches chlorophyll in PSII, which is absorbed by an electron, which becomes excited and moves to a higher energy level. 2. the electron passes to a carrier protein in the thylakoid membrane, and is passed down a series of carrier molecules called an electron transfer chain. 3. as the electron moves down, energy is lost from the el...

AQA GCSE Combined Science Trilogy : Biology Paper 1 Name the two types of cells Prokaryotic and Eukaryotic What is a prokaryotic cell? A cell without a nucleus Give an example of a prokaryote (Prokaryotic cell) Bacteria What is a eukaryotic cell? cell with a nucleus Give two examples of eukaryotic cells Plant & Animal cells What three sub-cellular structures do plant cells have which animal cells do not? Permanent vacuole, cell wall and chloroplasts What is the function of the nu...