Question

matching
write c for carbohydrate, l for lipid, p for protein, or n for nucleic acid

1. ______ store, transmit, and express genetic information
2. ______ provide a waterproof barrier to some organisms
3. ______ act as enzymes, structural support, and immune defense
4. ______ provide an immediate source of energy
5. ______ made up of monosaccharide monomers
6. ______ energy storage molecules
7. ______ monomers are composed of a sugar, phosphate group, and nitrogenous base
8. ______ make up triglycerides, phospholipids, waxes, and steroids
9. ______ amino acids link together to form a polypeptide
10. ______ contain phosphorus

Explanation:

• 8: Nucleic acids (DNA and RNA) store, transmit, and express genetic information.
• 9: Lipids (like waxes) can provide a waterproof barrier to some organisms.
• 10: Proteins act as enzymes (catalyze reactions), provide structural support (like collagen), and are involved in immune defense (antibodies are proteins).
• 11: Carbohydrates (especially simple sugars like glucose) provide an immediate source of energy.
• 12: Carbohydrates are made up of monosaccharide monomers (e.g., glucose is a monosaccharide, and starch is a polysaccharide made of glucose monomers).
• 13: Both carbohydrates (starch in plants, glycogen in animals) and lipids (triglycerides) can be energy - storage molecules. But lipids are more energy - dense. However, in the context of common textbook answers, both can be considered. But if we assume the most common immediate - energy - storage (carbohydrates) and long - term (lipids), but since the question is general, both are possible. But in many basic biology textbooks, when it's about energy storage molecules in general (not specifying short - term or long - term), both are acceptable. But if we consider the options given (C - carbohydrate, L - lipid, P - protein, N - nucleic acid), and the fact that both can store energy, but if we go by the most common pair (carbohydrates as immediate - storage and also a form of storage; lipids as long - term storage). But the question says "energy storage molecules" (general), so both C and L. But looking at the next question (15) is about lipids (triglycerides etc.), so maybe 13 is C (carbohydrates can store energy as starch/glycogen) and L (triglycerides). But since we can only choose one per question (assuming each blank is one letter), and in some basic overviews, carbohydrates (starch, glycogen) are considered energy - storage molecules (along with lipids). But if we have to pick one per question, and since 15 is about lipids (make up trigly...), then 13 can be C (as in plants starch is a storage carbohydrate, in animals glycogen).
• 14: Nucleic acid monomers (nucleotides) are composed of a sugar, phosphate group, and nitrogenous base.
• 15: Lipids make up triglycerides, phospholipids, waxes, and steroids.
• 16: Proteins - amino acids link together to form a polypeptide.
• 17: Nucleic acids (have phosphate groups with phosphorus) and some lipids (phospholipids have phosphorus in their phosphate head) contain phosphorus. But if we consider the most distinct one, nucleic acids (DNA, RNA) always have phosphorus in their structure (from the phosphate - sugar - phosphate backbone).

Answer:

1. N
2. L
3. P
4. C
5. C
6. C (or L, but if we assume the basic carbohydrate - energy - storage (starch/glycogen) concept in many intro texts)
7. N
8. L
9. P
10. N (and L, but N is more distinct as nucleic acids always have P in their backbone)