Snab biology Study guides, Revision notes & Summaries

These are A* quality notes that I wrote during my A Levels to help me revise for A Level Edexcel A SNAB Biology. Notes and resources for this exam board are very limited so I hope these notes help students that are struggling to find resources online. I wrote these using my class notes, the Edexcel SNAB textbook, mark schemes and other online resources such as savemyexams. At the end of the document, I have written some common exam questions that I came across during my revision along with their...

Topic 3 A Level Biology Edexcel SNAB

Edexcel A-Level Biology (SNAB) TOPIC 2 Genes and Health Exam 2023/2024

12 core practicals from an A* student, which received a pass on the practical endorsement requirement of the A level Edexcel SNAB biology course. Each core practical is detailed and comprehensive including: (i) apparatus table with purpose and safety of equipment listed, (ii) method (iii) results (iv) conclusion (v) evaluation + safety precautions (vi) tables and graph using spreadsheet software PLUS background preliminary research where necessary.

Description of nucleus - correct answer large organelle surrounded by a nuclear envelope which contains pores. the nucleus contains chromatin (which is made from DNA and proteins and a structure called the nucleolus. Function of nucleus - correct answer Controls the cells activities by controlling the transcription of DNA. DNA contains instructions to make proteins. Pores allow substances to move between the nucleus and cytoplasm. The nucleolus makes ribosomes Description of lysosome - cor...

Biodiversity - correct answer the variety of living organisms in an area. includes species diversity and genetic diversity Species diversity - correct answer the number of different species and the abundance of each species in an area Genetic diversity - correct answer the variation of alleles in the gene pool of a species Endemism - correct answer when a species is unique to a single place How is species richness counted - correct answer counting the number of species in a known are...

Function of flagellum - ANS-provides movements so that sperm can swim to egg Function of mitochondria - ANS-Aerobic respiration Produces ATP for movement

What is mass flow? - ANS-Mass flow is the bulk transport of substances from one area to another due to pressure differences

Topic 3 A Level Biology Edexcel SNAB