Please help, biochemistry homework question. More than one answer is possible. T
ID: 539701 • Letter: P
Question
Please help, biochemistry homework question. More than one answer is possible.
The starches-amylose, amylopectin, and glycogen--are all homopolysaccharides of alpha-D-glucose. Which of the following statements are true about the structure and function of the starches? D. They are stored intracellularly as insoluble granules C. Their function is primarily as structural components of cell walls A. Amylopectin is the most highly branched of the structures B. Amylose is unbranched and can adopt a helical structure F. Glycogen contains both alpha (1 rightarrow 6) and alpha (1 rightarrow 4) glycosidic bonds E. Each molecule of starch has only one reducing endExplanation / Answer
B. Amylose is unbranched and can adopt a helical structure
TRUE, there are no branches It attains helix structure.
C. Their function is primarily as structural components of cell walls
FALSE; their main function is storing the energy of the plant in form of long chains of glucose.
D. They are stored intracellularly as insoluble granules
TRUE; this is the main function of amylose as it occupies lesser space and not digested easily. That's why it is the storage form.
E. Each molecule of starch has only one reducing end
FALSE; this is visible in amylopectin, where there is one reducing and multiple non reducing ends. But in Amylose, there is no reducing end as it is a linear form of starch.
F. Glycogen contains both (16) and (14) glycosidic bonds
TRUE, because linear chain contains (14) bond and branch contains (16) bonds.
A. Amylopectin is the most highly branched of the structures
TRUE; it is highly branched, that's why it is different from amylose.