Question

1. the macromolecules that make up the majority of the cell membranes structure are

macromoléculas que constituyen la mayor parte de la estructura de la membrana celular...)
a. proteins (proteinas)
b. lipids (lipidos)
c. carbohydrates (hidratos de carbono)
d. enzymes (enzimas)

1. which category of carbon - based molecules includes sugars and starches? (¿qué categoria de moléculas

basadas en el carbono incluye los azúcares y los almidones?)
a. unsaturated fatty acids (ácidos grasos insaturados)
b. phospholipids (fosfolipidos)
c. proteins (proteinas)
d. carbohydrates (hidratos de carbono)

1. we obtain all of the macromolecules from the food that we eat except for _ (obtenemos

todas las macromoléculas de los alimentos que ingerimos excepto...)
a. carbohydrates (hidratos de carbono)
b. lipids (lipidos)
c. proteins (proteinas)
d. nucleic acids (ácidos nucleicos)

1. animals store most of their excess energy reserves as _ because... (los animales almacenan la

mayor parte de sus reservas energéticas sobrantes como _ porque...)
a. glucose; it is easy to break down. (glucosa; es fácil de descomponer.)
b. fat; they store twice as much energy per gram. (grasa; almacenan el doble de energia por
gramo.)
c. protein; it is a compact source of energy in their bodies. (proteínas; son una fuente compacta de
energía en su organismo.)
d. carbohydrates; they store twice as much energy per gram of glucose. (hidratos de carbono;
almacenan el doble de energía por gramo de glucosa. )
concept 3 open response
concepto 3 respuesta abierta

1. list the order in which each type of macromolecule would be consumed by the body for energy. (4 pts)

(enumera el orden en el que cada tipo de macromolécula sería consumida por el organismo para obtener
energía. (4 puntos))

Explanation:

1. The cell membrane is mainly composed of lipids (phospholipids form the bilayer).
2. Carbohydrates include sugars (monosaccharides like glucose) and starches (polysaccharides).
3. Nucleic acids (DNA, RNA) are synthesized in the body rather than obtained directly from food in large amounts compared to the other macromolecules.
4. Fats (lipids) store about twice as much energy per gram as carbohydrates or proteins.
5. The body first uses carbohydrates (e.g., glucose from sugars and starches), then fats, and finally proteins for energy.

Answer:

1. B. lipids (lípidos)
2. D. carbohydrates (hidratos de carbono)
3. D. nucleic acids (ácidos nucleicos)
4. B. fat; they store twice as much energy per gram. (grasa; almacenan el doble de energía por gramo.)
5. Carbohydrates, lipids, proteins.