Question

glycogen is a complex carbohydrate that serves as an energy - storage molecule in animals. chemically, glycogen is a long polymer made up of what repeating monomer unit?
a nucleotides
b fatty acids
c glucose
d amino acids

a doctor advises a patient to increase their intake of a biomolecule that serves as a primary source of short - term energy and is also a key component of cell walls in plants. which biomolecule is the doctor referring to?
a lipids
b nucleic acids
c carbohydrates
d proteins

what is the primary evolutionary distinction that separates a eukaryotic organism from a prokaryotic organism?
a the presence of a cell wall for structural support
b the presence of a membrane - bound nucleus and other organelles
c the ability to perform cellular respiration to generate atp
d the use of dna as genetic material

Explanation:

1. Glycogen is a polysaccharide made up of glucose monomers. Nucleotides are monomers of nucleic - acids, fatty acids are part of lipids, and amino acids are monomers of proteins.
2. Carbohydrates are the primary source of short - term energy and cellulose, a type of carbohydrate, is a key component of plant cell walls. Lipids are for long - term energy storage, nucleic acids carry genetic information, and proteins have various functions like structure and enzyme activity.
3. The main evolutionary difference between eukaryotic and prokaryotic organisms is that eukaryotes have a membrane - bound nucleus and other membrane - bound organelles, while prokaryotes do not. Some prokaryotes have cell walls, both can perform cellular respiration (though differently), and both use DNA as genetic material.

Answer:

1. C. glucose
2. C. carbohydrates
3. B. the presence of a membrane - bound nucleus and other organelles