HORTICULTURE

HORTICULTURE SCIENCE

PLANT BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What gives plants its tough fiber that gives plants their rigidity? *
A
Cuticle
B
Cellulose
C
Fructose
D
Phloem
Explanation: 

Detailed explanation-1: -In the cell walls of higher plants, the tensile fibers are made from the polysaccharide cellulose, the most abundant organic macromolecule on Earth, tightly linked into a network by cross-linking glycans.

Detailed explanation-2: -Cellulose is a substance found in the cell walls of plants. Although cellulose is not a component of the human body, it is nevertheless the most abundant organic macromolecule on Earth . The chemical structure of cellulose resembles that of starch, but unlike starch, cellulose is extremely rigid (Figure 1).

Detailed explanation-3: -Cellulose is a major component of plant cell walls, and is the world’s most abundant biopolymer. Cellulose contains apparently simple linear chains of glucose residues, but these chains aggregate to form immensely strong microfibrils.

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