Nur Izzati Binti Jeafree-72545
As a general knowledge, carbohydrates give and provides
energy to our body direct and indirectly. Those carbohydrates in our body are
distributed in all the cell and the tissues. There are four primary classes or
level of carbohydrates. First is monosaccharides which means made of only one
monomers. For example is glucose. Next is disaccharides which is made of two
monomers such as sucrose. Sucrose is made up of fructose and glucose. Third is
trisaccharides which mean made up of three monomers or three moosaccharides.
For example is Raffinose which is the composed of galactose, glucose and
fructose. Last but not least is polysaccharides. It is a long chains of
monosaccharides that are linked together by bond called glycosidic bonds.
Example is starch which is composed by the glucose itself.
There are several types of
carbohydrates that can be found in the food that we we eat in our daily life.
For example is vegetable, most of them that we eat in our daily life are
carbohydrates in nature. More clearly, potatoes have high amount of carbs and Other vegetables also have carbohydrates that varying
degrees. But carbohydrate is their prime content.Next is ice cream.
Everyone loves ice cream. There are cold, soft and rich in sugar. Did you know
that ice cream also contain carbohydrates? Ice cream have high amount of sugar
and fat material and carbohydrates is added as a sugar. Fruits
produce it own natural sugar without added by other producer. It is good and
healthy as they are rich in fiber and other nutrients such as vitamins.
Tay Yu Liang-71789
This week, on 19
November 2019, I had learn about the carbohydrates. There are 4 types of
carbohydrates such as monosaccharides, disaccharides, trisaccharides, and
polysaccharides. All of these carbohydrates can find in the living environment.
Monosaccharides, are the monomers of the polysaccharides, such as glucose,
fructose and galactose. We can find these monosaccharides in the honey, root
vegetables and flowers. Secondly, disaccharides are made up by two monomers,
such as maltose, is made up by two glucose, sucrose, is made up by one glucose
and one fructose, and lactose, is made up by one glucose and one galactose.
Trisaccharides, next, is made up three monomers, which is one of the oligosaccharides. Polysaccharides, is a long chained
of the monomers, such as, cellulose, starch, and glycogen. Carbohydrates
provide a lot if function to the living organisms. It can provide energy to the
organisms and act as the energy storage such as starch in plants and glycogen
in the animals. Carbohydrates can also provide structural functions such as
cell membrane in the bacterial cell walls and chitin in the exoskeleton animal.
Besides that, carbohydrates contribute cellular recognition. Take, for example,
antigens on the red blood cell and peptidoglycan in the bacterial cell walls.
In conclusion, carbohydrates are very important in our daily life. In is an
essential elements for living organisms.
Siti Aminah Maisarah-72673
There are
many new knowledge regarding carbohydrates that I gained from the class.
Besides, I also able to recall back on what I have learnt based on my past
learning. In my opinion, it is important to know and understand on what are we
going to learn before going deep into the topic. Primarily, carbohydrates is a
compound that consist of carbon and contain a large group of hydroxyl
(polyhydoxyl aldehydes and ketones). Basically, carbohydrates can be classified
into four groups which are monosaccharides, disaccharides, trisaccharides and
polysaccharides. Firstly, monosaccharides is the basic carbohydrates units and
its empirical formula is Cn(H2O)n where n=1
while for disaccharides n=2, trisaccharides n=3 to 20 and polysaccharides
n>20.Other than this, I also get to know the examples each of the group .As
for monosaccharides, there are three examples which are glucose, fructose and
galactose.
For
disaccharides, the examples are sucrose(glucose + fructose),lactose (galactose
+ glucose) and maltose (glucose + glucose).
Next, the
example for trisaccharides are raffinose (glucose + fructose + galactose) and
lastly the example for polysaccharides are starch ,cellulose and glycogen.
After knowing about the definition, the group and the
example, I am able to learnt about four major key role of carbohydrates which
are energy storage, structural component, cellular recognition and carbohydrate
derivatives. Based on my understanding, the first role of carbohydrate is
energy storage where it can be in form of glycogen and starch. As for glycogen,
it is the storage polysaccharides in animal while for starch it is the polymer
for the storage of energy made by the plants. The second role is structural
component where some of the example are cellulose and chitin. Cellulose it is
the primary component of plants cell walls and green algae while chitin is a
polysaccharides fibrous substance where it is important for exoskeleton of arthropods and
cell walls of fungi. Next, carbohydrate also function as cellular recognition
where complex carbohydrates carry out cell-cell communication. This is
important for intercellular activities .For instance, carbohydrates can act as
barrier to infection of bacteria and virus. Lastly, carbohydrates derivatives
are modified sugar molecules with substituents besides hydroxyl groups. Some of
the examples are glycosylamines, sugar phosphates and sugar acetates.
Carbohydrates is very essential in our daily life as it is the primary source
of energy .We need energy to do all the activities in our life as even
breathing need energy moreover other activities like walking, running and do
our work. Other than that, carbohydrate can helps us a lot in having a healthy
body as it helps in our digestive system and preserve muscle.
No comments:
Post a Comment