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Unit 3

EDEXCEL IAL BIOLOGY

Specification 2025 - 2026

Unit 3

AS Biology – Core Practicals Checklist

AS Biology – Core Practicals

Progress: 0%

CORE PRACTICAL 1

Use a semi-quantitative method with Benedict’s reagent to estimate the concentrations of reducing sugars and with iodine solution to estimate the concentrations of starch , using colour standards .

CORE PRACTICAL 2

Investigate the vitamin C content of food and drink.

CORE PRACTICAL 3

Investigate membrane properties including the effect of alcohol and temperature on membrane permeability .

CORE PRACTICAL 4

Investigate the effect of temperature, pH, enzyme concentration and substrate concentration on the initial rate of enzyme-catalysed reactions .

CORE PRACTICAL 5

(i) Use a light microscope to make observations and labelled drawings of suitable animal cells .

(ii) Use a graticule with a microscope to make measurements and understand the concept of scale.

CORE PRACTICAL 6

Prepare and stain a root tip squash to observe the stages of mitosis .

CORE PRACTICAL 7

Use a light microscope to: (i) Make observations, draw and label plan diagrams of transverse sections of roots , stems and leaves . (ii) Make observations, draw and label cells of plant tissues . (iii) Identify sclerenchyma fibres , phloem , sieve tubes and xylem vessels and their location.

CORE PRACTICAL 8

Determine the tensile strength of plant fibres .

CORE PRACTICAL 9

Investigate the antimicrobial properties of plants , including aseptic techniques for the safe handling of bacteria.

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IAL Biology 2025 - 2026

Complete Course (Units 1 + 2 + 3)

✅ All Components of units 1 and 2

✅ Unit 3 Practicals 🔬

✅ Two Years Access

🎁 22 Revision Classes

Topic 1
Topic 2
Topic 3
Topic 4
Unit 3
Topic 5
Topic 6
Topic 7
Topic 8
Unit 6

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