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AQA A-Level Biology Flashcards - Unit 1

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2023/2024 Written for academic year
Institution AQA
Module Unit 1 - Biological molecules
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A* Grade Flashcards for AQA Biology In depth and condensed for quick studying Save time creating resources , begin active recall immediately instead

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Unit 1 Flashcards

, What is the test for
reducing sugars?



QUESTION


Heat with Benedict's in
water bath for 5 minutes
Insoluble Cu2O red
precipitate
Turns orange-brown


ANSWER

, How is the Benedict's
test semi-quantitative?




QUESTION



Difference in colour
shows the approximate
concentration of
reducing sugar in the
sample
ANSWER

, What is the test for
non-reducing sugars?



QUESTION

Perform reducing sugars test given
negative result
Heat with dilute HCl in water bath for 5
minutes to hydrolyse the disaccharides
into monosaccharides
Neutralise with NaHCO3 as Benedict's
does not work in acidic conditions
Heat with Benedict's, if non reducing
sugars were initially present reducing
sugars will be now and will give orange-
brown colour

ANSWER

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Subject
A Level Biology
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September 8, 2025
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