Summary of topic 1 Biology Edexcel A Level- with complete notes!

This document provides a summary of the following topics: difference between cellulose and starch permanent vacuole with it's funtion chloroplast and differences and similarities between chloroplast and mitochondria. amyloplast description of structure and function of ground tissues in plants in a table (parenchyma, sclerenchyma, and collenchyma)

Edexcel A Level Biology Paper 3 Mark scheme June 2022: (9BI0) Paper 3: General and Practical Principles in Biology. A description including four of the following • {sodium / Na} channels open (1) • sodium ions flow into {axon / cell / neurone} (1) • this causes depolarisation (1) • {sodium / Na} channels close at {0.8ms / 30mV} (1) • {potassium / K} channels open at {0.8ms / 30mV} (1) (4) Question Number Answer Additional Guidance Mark 1(b) An answer that includes the followin...