Question

Organic compounds have a variety of roles that support living organisms.

Which sentence from the article provides the BEST support for the above statement?
(A)There are four main types or classes of organic compounds that are found in all living things.

(B)Organisms use carbohydrates as energy sources, structural units, as well as for other purposes.

(C)Some proteins contain other atoms, such as sulfur, phosphorus, iron, copper or magnesium.

(D)A nucleic acid is a type of biological polymer made up of chains of nucleotide monomers.

Answer 1

The best supporting sentence is (B) since it directly illustrates the variety of essential roles that organic compounds fulfill in organisms, specifically referencing the use of carbohydrates for energy and structure.

Step-by-step explanation:

The student's question is related to the roles of organic compounds in living organisms. The sentence that provides the BEST support for the statement 'Organic compounds have a variety of roles that support living organisms' is (B) 'Organisms use carbohydrates as energy sources, structural units, as well as for other purposes.' This sentence directly relates to how organic compounds are used in various essential roles within an organism's biology. Carbohydrates serve as one of the key classes of organic compounds and are indeed used for energy (via glucose), structural support (such as cellulose in plant cell walls), and other critical biological functions. Additionally, organic compounds such as lipids, proteins, and nucleic acids also play vital roles in the structure and function of living organisms.