18. Name a molecule that fits the description. A. A polysaccharide that is used

Question

18. Name a molecule that fits the description.
A. A polysaccharide that is used as an energy storage molecule
B. A lipid that is used to form membranes.
C. A lipid that is used as a signaling molecule in humans
D. A nucleic acid that is believed to have been the first organic molecule in protocells
E. A polysaccharide that is used for cell walls. 18. Name a molecule that fits the description.
A. A polysaccharide that is used as an energy storage molecule
B. A lipid that is used to form membranes.
C. A lipid that is used as a signaling molecule in humans
D. A nucleic acid that is believed to have been the first organic molecule in protocells
E. A polysaccharide that is used for cell walls.
A. A polysaccharide that is used as an energy storage molecule
B. A lipid that is used to form membranes.
C. A lipid that is used as a signaling molecule in humans
D. A nucleic acid that is believed to have been the first organic molecule in protocells
E. A polysaccharide that is used for cell walls. A. A polysaccharide that is used as an energy storage molecule
B. A lipid that is used to form membranes.
C. A lipid that is used as a signaling molecule in humans
D. A nucleic acid that is believed to have been the first organic molecule in protocells
E. A polysaccharide that is used for cell walls.

Explanation / Answer

A) Glycogen - Glycogen is a polysaccahride that is used as a energy storage molecule in animal, fungi and bacterial cells. Whereas in plants, starch is the polysaccharide that is used for storage of energy.

B) Phospholipids - Along with phospholipids, glycolipids and cholesterol are also used to form cell membranes. Phospholipids with their amphiphilic property forms the bilayer of themembranes.

C) Sphingolipids - Sphingolipids play a major role in signal transmission. Sphingolipids consists of sphingoid bases.

D) Ribonucleic acid (RNA) - RNA is believed to be the first genetic material in protocells. But RNA, a single stranded molecule was unstable and it is believed to be evolved into a more stable DNA.

E) Cellulose - Cellulose, a polysaccharide is the major structural component of plant cell walls. It is a straight chain polymer that is derived from D-glucose units.

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