Which of these molecular structures could be found in a lipid, but not in a carbohydrate, protein, or nucleic acid?

A. a long chain of carbon, oxygen, and nitrogen atoms

B. a long chain made only of carbon and hydrogen atoms

C. a phosphate group joined to a chain of carbon atoms

D. an amino group and a carboxyl group bonded together

Question

Biology

Janelle Rasmussen

19 March, 11:35

Which of these molecular structures could be found in a lipid, but not in a carbohydrate, protein, or nucleic acid?

A. a long chain of carbon, oxygen, and nitrogen atoms

B. a long chain made only of carbon and hydrogen atoms

C. a phosphate group joined to a chain of carbon atoms

D. an amino group and a carboxyl group bonded together

+2

Answers (2)

Know the Answer?

Yamilet Green · Answer 1

I know this is late, but for the people looking for the answer, its carbon and hydrogen

Janelle Gordon · Answer 2

B

Explanation:

Lipids are made of very long carbon chains connected to other carbons and hydrogen. These chairs can be connected to another molecule such as glycerol. Examples of lipids are triglycerides, cholesterol, and phospholipid that differ in the length of their chains and also the number of double bonds in these chains. These chains - that are the main characteristic that defines lipids - are hydrophobic.