Question

Question 1
1. A student reports they ate toast with peanut butter and a glass of milk for breakfast. Which combination of biomolecules best represents this meal?(1 point)
Responses

Carbohydrates only
Carbohydrates only

Proteins and lipids only
Proteins and lipids only

Carbohydrates, proteins, and lipids
Carbohydrates, proteins, and lipids

Carbohydrates, proteins, lipids, and nucleic acids
Carbohydrates, proteins, lipids, and nucleic acids
Question 2
2. Which statement best explains how carbon, hydrogen, and oxygen were involved in the student’s breakfast described above?(1 point)
Responses

Carbon is only found in proteins, hydrogen is only found in water, and oxygen is only found in carbohydrates.
Carbon is only found in proteins, hydrogen is only found in water, and oxygen is only found in carbohydrates.

All biomolecules consumed contain carbon, hydrogen, and oxygen, which are rearranged during digestion to release energy or build new molecules.
All biomolecules consumed contain carbon, hydrogen, and oxygen, which are rearranged during digestion to release energy or build new molecules.

Carbon, hydrogen, and oxygen are only important in carbohydrates, while proteins and lipids are made of different elements.
Carbon, hydrogen, and oxygen are only important in carbohydrates, while proteins and lipids are made of different elements.

These elements are only used in respiration, not digestion.
These elements are only used in respiration, not digestion.
Question 3
3. Which scenario demonstrates the best understanding of how biomolecules provide energy and structure from breakfast foods?(1 point)
Responses

Milk provides protein for muscle repair, toast provides carbohydrates for quick energy, and peanut butter provides lipids for long-term energy storage.
Milk provides protein for muscle repair, toast provides carbohydrates for quick energy, and peanut butter provides lipids for long-term energy storage.

Milk provides only calcium for bones, toast provides only fiber, and peanut butter provides only fat.
Milk provides only calcium for bones, toast provides only fiber, and peanut butter provides only fat.

All foods provide the same energy molecules, so it doesn’t matter what you eat.
All foods provide the same energy molecules, so it doesn’t matter what you eat.

Toast, milk, and peanut butter only provide carbohydrates, which are stored as fat.

Answer 1

Question 1: Carbohydrates, proteins, and lipids.
- Toast = mainly carbohydrates; peanut butter = proteins and lipids (plus some carbs); milk = protein, lipids (if whole milk) and carbs (lactose).

Question 2: All biomolecules consumed contain carbon, hydrogen, and oxygen, which are rearranged during digestion to release energy or build new molecules.
- C, H, and O are basic elements in carbs, lipids, and proteins (proteins also contain N, sometimes S) and are broken down/reassembled in digestion and metabolism.

Question 3: Milk provides protein for muscle repair, toast provides carbohydrates for quick energy, and peanut butter provides lipids for long-term energy storage.
- This best matches how different macromolecules serve energy and structural/repair roles (note peanut butter also supplies some protein and carbs, and milk supplies calcium/nutrients as well).