Metabolism of a Modified Polysaccharide

Very Hard Biochemistry Carbohydrates

In metabolic pathways, carbohydrates play pivotal roles as energy sources and structural components. Carbohydrates can be classified into simple sugars, such as monosaccharides and disaccharides, and complex carbohydrates, which include oligosaccharides and polysaccharides. The molecular structure and functional groups of these carbohydrates significantly influence their biochemical behavior and interactions within biological systems.

This passage examines a newly identified polysaccharide derived from a marine organism. Research demonstrates that this polysaccharide has a unique branching structure reminiscent of amylopectin but contains an unusual modification at the C6 position on the glucose units, namely the presence of a sulfonate group. The implications of this modification on digestibility and energy release are of great interest, as the sulfonate could potentially alter the way this polysaccharide interacts with digestive enzymes and gut microbiota.

Based on the information presented, which of the following statements is most likely true regarding the metabolism of this newly discovered polysaccharide?

The presence of the sulfonate group will likely enhance the digestibility of the polysaccharide by promoting enzymatic hydrolysis.

Due to its structural similarity to amylopectin, this polysaccharide will be rapidly broken down by alfa-amylase.

The sulfonate modification may hinder the interaction of the polysaccharide with digestive enzymes, leading to reduced energy absorption.

This polysaccharide is expected to be absorbed directly into the bloodstream unchanged, similar to monosaccharides.

Hint

Submitted16.9K

Correct14.0K

% Correct83%