During cellular respiration, the covalent bonds of a molecule are broken down to make products. Which molecule is broken down?(1 point) Responses ADP ADP water water sugar sugar carbon dioxide

During cellular respiration, the molecule that is primarily broken down is **sugar** (specifically glucose). The process involves breaking the covalent bonds in sugar to release energy that is then used to produce ATP. So, the correct response is **sugar**.

During cellular respiration, four total ATP are produced when pyruvic acid is created. What else is produced as a result of this reaction?(1 point) Responses water water oxygen oxygen sugar sugar heat

During cellular respiration, when pyruvic acid is created (specifically during glycolysis), in addition to the production of four ATP molecules, **water** is also produced. Therefore, the correct response is **water**.

Why does hydrogen bond so tightly to oxygen during cellular respiration?(1 point) Responses It is not electronegative, but oxygen is. It is not electronegative, but oxygen is. It is less electronegative than oxygen. It is less electronegative than oxygen. It is more electronegative than oxygen. It is more electronegative than oxygen. It is electronegative, but oxygen is not.

The correct response is: **It is less electronegative than oxygen.**

In a water molecule (H₂O), oxygen is highly electronegative compared to hydrogen, which means it attracts the shared electrons in the covalent bonds more strongly. This difference in electronegativity allows for the formation of hydrogen bonds between water molecules, contributing to the strong interaction between hydrogen and oxygen.

Identify the byproduct of lactic acid fermentation.(1 point) Responses oxygen oxygen lactic acid lactic acid carbon dioxide carbon dioxide pyruvic acid

The byproduct of lactic acid fermentation is **lactic acid**. Therefore, the correct response is **lactic acid**.

When a reaction releases more energy than it uses, it is called(1 point) Responses emeritus emeritus exothermic exothermic catalyst catalyst lactic

When a reaction releases more energy than it uses, it is called **exothermic**. Therefore, the correct response is **exothermic**.