Question

what do carbohydrates and lipids have in common? choose 2 correct answers!* they have the same monomer. they are both made of c, h, and o atoms. their functions both have to do with energy. they both make up the cell walls in plant cells.

Explanation:

• Carbohydrates: Monomers are monosaccharides (e.g., glucose). General formula \(C_nH_{2n}O_n\). Main function is short - term energy storage (e.g., glucose for immediate energy) and structural (e.g., cellulose in plant cell walls).
• Lipids: Monomers are fatty acids and glycerol (for triglycerides). General formula has a high \(C\) and \(H\) content compared to \(O\). Main functions include long - term energy storage (e.g., triglycerides), insulation, and as components of cell membranes (e.g., phospholipids).

Now, analyze each option:

• They have the same monomer: Carbohydrates have monosaccharides as monomers, lipids (triglycerides) have fatty acids and glycerol. So this is incorrect.
• They are both made of \(C\), \(H\), and \(O\) atoms: Carbohydrates (\(C_nH_{2n}O_n\)) and lipids (e.g., triglycerides \(C_{55}H_{98}O_6\)) contain \(C\), \(H\), and \(O\). This is correct.
• Their functions both have to do with energy: Carbohydrates (e.g., glucose) for short - term energy, lipids (e.g., triglycerides) for long - term energy. This is correct.
• They both make up the cell walls in plant cells: Cellulose (a carbohydrate) makes up plant cell walls. Lipids are not a major component of plant cell walls. So this is incorrect.

Answer:

• B. They are both made of \(C\), \(H\), and \(O\) atoms.
• C. Their functions both have to do with energy.