QUESTIONS AND VERIFIED ANSWERS GRADED
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◉ What do carbohydrates do? Answer: provide energy, in the form of
sugars like glucose and fructose, but they also make up structures like
cellulose, which form the cell wall of plant cells
◉ What type of carbohydrate is the most important source of energy?
Answer: mono-, di- and poly-saccharides
◉ What are mono and disaccharides? Answer: polar and soluble in water
◉ What are polysaccharides? Answer: Macromolecules resulting from
polymerisation (condensation) of sugars and are not soluble in water
◉ Examples of monosaccharides Answer: ribose, glucose, fructose,
galactose
◉ What forms a disaccharide? Answer: two monosaccharides linked
together by condensation reactions with glycosidic bonds releasing one
H2O molecule
,◉ Alpha glucose structure Answer:
◉ Beta glucose structure Answer:
◉ Examples of Polysaccharides Answer: cellulose, glycogen and starch
◉ Monomer of Sucrose Answer: glucose and fructose
◉ monomer of maltose Answer: glucose and glucose
◉ monomer of lactose Answer: glucose and galactose
◉ monomer of starch Answer: glucose
◉ monomer of glycogen Answer: glucose
◉ monomer of cellulose Answer: glucose
◉ In animals, what carbohydrate stores energy? Answer: glycogen
◉ What jobs do carbohydrates have other than storing energy? Answer:
structural components
, ◉ What differs the polysaccharides all made up of glucose? Answer:
they differ in the arrangement of glucose molecules and position of the
glycosidic bonds
◉ Starch arrangement Answer: amylopectin branched, amylose linear
◉ What is galactose? Answer: a sugar in milk
◉ What is fructose? Answer: a sugar found in fruit and honey
◉ Main characteristic of lipids? Answer: little to no affinity to water,
mostly hydrophobic
◉ What are the simple forms of lipids? Answer: fat, oil and wax
◉ What are lipids characteristics in different solvents? Answer: they are
non-polar and insoluble in water, but soluble in organic solvents
◉ What are triglycerides? Answer: the main group of lipids. They are
formed by condensation reactions between one glycerol and three fatty
acids, creating ester bonds