Question

explain pectin chitin Agar

Answer 1

$\mathbb{PECTIN: }$

▶️It is a heteropolysaccharide composed of galactose ,arabinose rhamnose and galacturonic acid .
⏩The pectin usually becomes bound together to calcium Ion it forms matrix of cell wall and helps in origination of microfibrils in the middle lamella of plant cell wall.
It joins the cells together it is soluble in water and forms SOL- GEL interchange and commercially used as a gelling agent.

$\mathbb{CHITIN; }$

▶️It is a heteropolysaccharide composite of an n acetylglucosamine molecules .
⏩The chitin molecules are arranged in long parallel and stretching scrutiny smaller two cylinders in structure and function .
it forms exhaust skeleton of arthropods and cell wall of fungi it is the second largest organic compound on Earth it is insoluble and impervious to water .

$\mathbb{AGAR: }$

▶️It is heteropolysaccharide composed of galactose monomers .it is phycocolloids former of D galactose and 3-6 Alpha galactose .
⏩the Agar is extracted from the red algae it forms gel with water and can be used in culture medium for growing plants tissue and bacteria .

⏩it is also used as gelling agent in a variety of products such as ice creams, polishes, medicines and etcccc . I t is used as a laxative and a stabilizer .

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Answer 2

In plant biology, pectin consists of a complex set of polysaccharides (see below) that are present in most primary cell walls and are particularly abundant in the non-woody parts of terrestrial plants. Pectin is a major component of the middle lamella, where it helps to bind cells together, but is also found in primary cell walls. Pectin is deposited by exocytosis into the cell wall via vesicles produced in the golgi.

The amount, structure and chemical composition of pectin differs among plants, within a plant over time, and in various parts of a plant. Pectin is an important cell wall polysaccharide that allows primary cell wall extension and plant growth. During fruit ripening, pectin is broken down by the enzymes pectinase and pectinesterase, in which process the fruit becomes softer as the middle lamellae break down and cells become separated from each other.[5] A similar process of cell separation caused by the breakdown of pectin occurs in the abscission zone of the petioles of deciduous plants at leaf fall.