OCR A Level Biology Exam Bundle with Complete Solutions Latest Updated 2024.

Exam questions A level biology OCR Questions and Correct Answers 2024 how does an endotherm respond to an increase in temperature - Correct Answer dilation of arterioles near surface of the skin stating chromosome numbers (2n,4n,n) what correctly describes mitosis and meiosis - Correct Answer mi...

OCR A Level Biology Paper 1 Questions and Answers Verified 2024 Priority Topics Auxin is a plant hormone produced in the shoot tip. Auxin causes cell elongation and travels down the stem from the tip. Auxin is destroyed by sunlight. Explain how this leads to positive phototropism in the plant. - Co...

Exam Questions Biology set 1 paper 1 Questions and Answers 2024 Describe how the concentration of cholesterol in her blood changed over a ten year period (2) - Correct Answer fluctuation and overall decrease steep decrease first/after two years and then gradual decrease Explain the overall chan...

OCR A Level Biology summer Assessment Questions and Correct Answers Verified 2024 Which of the options, A to D, correctly describes how an endotherm would respond to an increase in temperature? - Correct Answer A: dilation of arterioles near the surface of the skin Which of the images, A to D, c...

A Level Biology OCR Questions and Answers Verified 2024 What is a light microscope used for? - Correct Answer Observing living and dead specimins What are the pros and cons of a light microscope? - Correct Answer Pros: Cheap, portable, easy to use, can study living specimens. Cons: Limited magni...

OCR Biology Exam Practice Questions and Correct Answers 1ai) Drawing fig 1.2 - teacher sees two of labels are incorrect and that the biological drawing was poor quality identify 1 incorrect label and explain your answer - Correct Answer ribosome, you cant see this with a light microscope 1aii)...

Specimen MS Paper 1 OCR Biology Questions and Correct Answers correct sequence of organelles involved during the production and secretion of a protein - Correct Answer -rough endoplasmic reticulum -Golgi body -vesicles -cell wall/cell membrane Thymine(T) is what in a transcripted mRNA sequ...

OCR A Level Biology Questions and Answers Verified Graded A+ 2024 What is Cell signalling? - Correct Answer When cells communicate by signalling, one cell releases a chemical•This chemical is detected by another cell•The second cell then responds to this signal What are the two Cell signalli...

OCR A Level Biology Modules 1 to 4 Questions and Answers why do specimens need to be thin when observing them under a light microscope? - Correct Answer to allow light to pass through identify and explain the starch test - Correct Answer add iodine dissolved in potassium iodide solution to the ...

OCR A Level Biology Revision Flashcards and Questions Cofactor Coenzymes and Prosthetic Groups Verified 2024 Cofactor - Correct Answer Non-protein helper component, helps enzymes carry out its function, binds loosely/temporarily to enzyme to activate them Coenzymes - Correct Answer Organic Cofac...

OCR A Level Biology Practicals Questions and Answers Verified 2024 Practical 1 : Using a Light microscope to examine blood smears - Correct Answer Preparation: 1.) staining samples with methylene blue/ eosin - staining to add contrast so it is easier to identify different parts of te cell - for ...