20,025
edits
Changes
no edit summary
===About Sugar===
====Sugar Molecules====
: '''Sugar molecules ''' [[molecule]]s are referred to as 'simple and [[molecule]]s' which can be quickly [[Absorb (Biology)|absorbed]] into the body can quickly get to provide [[energy from them]] by [[respiration]].
: You should know:
*Glucose - A sugar found in syrup and sweets.
====Testing For Sugars====
: [[Glucose]] and Fructose can be detected with the [[Benedict's Test]].
: [[Sucrose ]] cannot be detected with the [[Benedict's Test]] unless you first react it with [[dilute hydrochloric acid]] [[Hydrochloric Acid]].
=====Method=====
: 1. A sample of food is dissolved [[dissolve]]d in [[water]].: 2. The solution is added to blue [[Benedict's Test|Benedict's]] [[solution ]] in a [[Boiling Tube|boiling tube]].: 3. The [[solution ]] is kept at 90°C for up to 10 minutes.: 4. A colour change indicates the presence of [[glucose ]] or [[fructose]]. If they are present the solution will eventually turn brick red or brown.
{| class="wikitable"
If this was done with sucrose the Benedict's solution would stay blue.
|}
==Key Stage 4==
===Meaning===
'''Sugar''' is a term used to refer to several [[monosaccharide]]s and [[disaccharide]]s.
===About Sugar===
: '''Sugar''' [[molecule]]s can join together in [[Condensation Polymerisation|condensation polymerisation]] [[Chemical Reaction|reactions]] to form [[polysaccharide]]s.