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Summary Ch 3 Cell Structure notes A* AQA A Level Biology

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70 pages
2020/2021 Written for academic year
Institution AQA
Module Unit 2 - Cells
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Preview 4 out of 70 pages

A set of thorough and concise notes created and used by an A* grade student to revise Cell Structure (ch 3 from the A Level AQA Biology course). The notes are detailed and clearly explain the topic by breaking each process down into steps. It includes clear and detailed diagrams and includes all content from ch 3 of the AQA A Level Biology specification and textbook.

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3.1 Methods of
studying cells

,Magnification
• Object –
sample under
microscope

,Resolution
• Minimum distance apart 2 objects can be to appear as separate
• Light – 0.2um
• TEM – 0.1nm
• SEM – 10nm
• Up until max resolution, increasing magnification shows detail but
then it is blurry

, Cell fractionation
• Cells are broken up and organelles are separated
• Before fractionation, cells are in a cold, buffered, isotonic solution

• Cold – reduce enzyme activity so organelles are whole
• Buffered – stops pH changes
• Isotonic – prevent bursting/shrinking due to osmosis
Connected book
image
Glenn Toole, Susan Toole AQA Biology A Level Student Book
Publisher: januari 2015 ISBN: 9780198351764 Edition: 1

Document information

Study Level
A/AS Level
Subject
A Level Biology
Summarized whole book?
No
Which chapters are summarized?
Ch 3 cell structure
Uploaded on
May 28, 2022
Number of pages
70
Written in
2020/2021
Type
Summary
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