Question

cellular respiration

the energy produced during cellular respiration is essential for a wide range of cellular processes that keep organisms alive and functioning. one key process that utilizes atp from cellular respiration is active transport, where molecules are moved across cell membranes against their concentration gradient. this is crucial for maintaining proper ion balances within cells, such as the sodium-potassium pump in nerve cells. another process is muscle contraction, which requires atp to enable muscle fibers to slide past one another, allowing for movement and physical activity. additionally, protein synthesis relies on the energy from cellular respiration to form peptide bonds between amino acids, producing the proteins needed for cell structure, enzyme activity, and signaling. finally, cell division uses large amounts of atp during mitosis to ensure that chromosomes are properly replicated and divided between daughter cells. all of these processes depend on the continuous supply of atp generated through cellular respiration to function efficiently.

figure 1. a model of cellular respiration

based on the information in figures 1 and 2, which statement best describes the process of cellular respiration. (choose 3)

a energy is stored in oxygen molecules.
b water is generated as a product.
c atp is produced during cellular respiration.
d glucose and oxygen are produced as energy is released.
e carbon dioxide is released during the process.

Explanation:

Cellular respiration is a biochemical process where cells break down glucose in the presence of oxygen to produce energy in the form of Adenosine Triphosphate (ATP). The general chemical equation for aerobic respiration is:

$$C_{6}H_{12}O_{6} + 6O_{2} ightarrow 6CO_{2} + 6H_{2}O + \text{ATP}$$

Based on this process:

• ATP production: The primary goal of cellular respiration is to convert biochemical energy from nutrients into ATP (Statement C).
• Products: The chemical reaction yields carbon dioxide ($CO_{2}$) and water ($H_{2}O$) as byproducts (Statements B and E).
• Reactants: Glucose and oxygen are the starting materials (reactants), not the products (making Statement D incorrect).
• Energy storage: Energy is stored in the chemical bonds of ATP, not in oxygen molecules (making Statement A incorrect).

Answer:

B. Water is generated as a product.
C. ATP is produced during cellular respiration.
E. Carbon dioxide is released during the process.