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Course: Cambridge AS & A Level Biology 9700 ...
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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

0/41

5 · The Mitotic Cell Cycle

0/21

6 · Nucleic Acids and Protein Synthesis

0/22

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

0/13

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/34

17-18 · Selection, Evolution, Classification and Conservation

0/69

19 · Genetic Technology

0/44
Quiz

2.1.3 Testing for Non-Reducing Sugars – Exam questions

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  • Questions count: 5
  • Passing grade: B+
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1.

The test for a non-reducing sugar involves

adding iodine
adding biuret reagent
boiling with acid, neutralising, then carrying out Benedict’s test
adding ethanol
2.
Positive Benedict’s test for reducing sugar gives:
Brick-red colour on heating
Blue-black
Purple
Cloudy white
3.
Which statement best describes Reducing sugar?
Which statement best describes Reducing sugar?
Gives a positive Benedict’s test (all monosaccharides, maltose).
Bond between two monosaccharides.
Joining monomers with loss of water.
Bond between two amino acids.
4.
Which reagent and observation show a reducing sugar?
Iodine turning blue-black
Biuret turning purple
Benedict's reagent heated, turning brick red
Ethanol giving a milky emulsion
5.
Which disaccharide is non-reducing?
Sucrose
Maltose
Lactose
All are reducing
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Part of 2 · Biological Molecules — see every lesson and quiz in this unit.
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