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Examen

A Level Edexcel Biology B – Core Practicals Exam Questions
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17

mayo 2026

2025/2026

A+
A Level Edexcel Biology B – Core Practicals Exam Questions with Complete Solutions (Updated 2025/2026) Justify how would you set up a respirometer to measure the rate of anaerobic respiration in yeast? -in boiling tube put 5 cm3 of yeast -5 cm3 of glucose solution so yeast has supply of glucose for respiration -thin later of vegetable oil to provide barrier to oxygen -draw coloured liquid to the end of the tube as the coloured liquid will move away as CO2 is produced What are the typ...
AppexAcademy
$13.89 Más información

Examen

Topic 2 - A Level Edexcel Biology Exam with Solutions
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8

enero 2024

2023/2024

A+
Diffusion - passive movement of molecules What is diffusion dependent one? - concentration, thickness of diffusion pathway, surface area How are lungs adapted for efficient gas exchange - Lots of alveoli - large surface area Capillary endothelial - one cell thick, short diffusion pathway Breathing in and out maintains a concentration gradient Fick's Law of Diffusion - surface area x concentration gradient / diffusion pathway What are proteins made from? - long chains of amino...
kharowl
$9.99 Más información