H422 - Study guides, Class notes & Summaries

2 OCR 2023 Section A You should spend a maximum of 40 minutes on this section. Write your answer for each question in the box provided. 1 The image shows an erythrocyte after being placed in a solution. Which option explains the appearance of the erythrocyte? A The solution was distilled water. B The water potential of the solution is equal to the water potential of the cytoplasm of the erythrocyte. C The water potential of the solution was less negative than the cytoplasm of the eryth...

1 This question is based on the Advance Notice Article ‘Development of therapeutic antibodies for the treatment of disease’. (a) (i) State what is meant by the term antigen. ........................................................................................................................................... . ..................................................................................................................................[1] (ii) Scientists can combine antibody fra...

Apoptosis is the programmed cell death of damaged or unwanted cells. (a) Fig. 1.1 shows a transmission electron micrograph (TEM) of apoptosis of a leucocyte. Fig. 1.1 A B C (i) Name the following structures and processes shown in Fig. 1.1: • the structure labelled A forming in the cell surface membrane • the process occurring to the organelle labelled B • the structure labelled C. Structure A ...........................................................................................

Biology B H422/01: Fundamentals of biology A Level Question Paper & Mark Scheme (Merged)

ocr A Level Biology B H422-01 QUESTION PAPER June2023.

ocr A Level Biology B H422-01 MARK SCHEME June2023.

Biology B H422/03: Practical skills in biology A Level Question Paper & Mark Scheme (Merged)

ocr A Level Biology B (Advancing Biology) (H422-03) June 2022 Question Paper

ocr A Level Biology B H422-01 Question Paper June2023.

ocr A Level Biology B H422-03 Question Paper June2023.