6. A) On the basis of units of hydrolysis
i) Monosachharides : These carbohydrates cannot be
hydrolysed further to give simpler units
Example: Glucose, fructose etc
ii) Oligosachharides: These carbohydrates can be hydrolysed
further to give 2-10 simpler units. If they give two units
then disachharide, 3 then trisachharides etc.
Example: sucrose (glucose + fructose), maltose (glucose +
glucose) etc
iii)Polysachharides: These carbohydrates can be hydrolysed
further to give large number of simpler units
Example: cellulose, starch, glycogen etc
7. B) On the basis of reducing character
i) Reducing Sugars : The carbohydrates that can reduce fehling’s and tollen’s
reagent are known as reducing sugars. Example: maltose and lactose
ii) Non-reducing sugars: The carbohydrates that cannot reduce fehling’s and
tollen’s reagent are known as reducing sugars. Example: Sucrose
C) On the basis of functional
group(Monosaccharides)
i) Aldose: If the monosachharide contains aldehyde as the functional group, then
it is known as aldose. Eg: Glucose
ii) Ketose: If the monosachharide contains ketone as the functional group, then it
is known as ketose. Eg: Fructose
8. C) On the basis of number of carbon atoms
present(Monosaccharides)
9.
10.
11.
12.
13.
14. Relative configuration – D and L nomenclature
If the OH group on the lowest asymmetric carbon is on the right,
then the Carbohydrate is assigned D- configuration whereas if it is
on left, then it is L-configuration.
19. Mutarotation
The spontaneous change in the specific rotation of an optically active compound
with time till equilibrium is reached is known as mutarotation.
Eg: The specific rotation of freshly prepared solution of α-D(+)glucose changes
from 112.2o to 52.5o with time whereas that of β-D(+) glucose changes from 18.7o
to 52.5o with time till it reaches equilibrium.
21. MF : C6H12O6
Contains ketonic functional group
Name is D-(-) Fructose.
(Laeveorotatory)
Cyclic form
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34. Physical properties
Colourless, crystalline solids
High melting point
Water soluble substances
Behave like salts due to presence of both acidic (carboxyl) and basic (amino)
group.
Basic group
Acidic group
35.
36.
37.
38. Polypeptide: When the number of combining amino acids is
more than 10, then it is known as polypeptide.
When the polypeptide has more than 100 amino acids, with
molecular mass more than 10,000 u is known as protein.
48. When a protein in native form is subjected to change in
temperature, ph, chemical change, then the hydrogen bonds
are broken due to which globules unfold, helix gets uncoiled
and protein loses it biological activity known as denaturation.
