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Unit 4 - Biological Molecules

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Total cards: 9•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (9)

#1
Front (Question)

Elements in Carbohydrates

Back (Answer)

• Carbon • Hydrogen • Oxygen

#2
Front (Question)

Elements in Fats

Back (Answer)

• Carbon • Hydrogen • Oxygen

#3
Front (Question)

Elements in Proteins

Back (Answer)

• Carbon • Hydrogen • Oxygen • Nitrogen • Sometimes Sulphur

#4
Front (Question)

Test for Starch

Back (Answer)

Iodine will turn from orange to blue-black.

#5
Front (Question)

Test for Reducing Sugars (glucose)

Back (Answer)

Benedicts solution + heat will turn from blue to green/yellow/orange

#6
Front (Question)

Test for Protein

Back (Answer)

Biurets test will turn from blue to lilac/purple

#7
Front (Question)

Test for fats and oils

Back (Answer)

Emulsion test. Add ethanol to test tube with sample, shake vigourously. The sample will turn cloudy milky if positive

#8
Front (Question)

Test for Vitamin C

Back (Answer)

DCPIP decolourises(will become clear from blue) if positive

#9
Front (Question)

Solvent

Back (Answer)

A liquid that dissolves substances. Water is an important solvent in organisms for digestion, excretion and transport.