LABORATORY REVIEW
CELL RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Gains protons, electrons, and energy.
|
|
|
Releases protons, electrons, and energy.
|
|
|
Loses energy to the environment.
|
|
|
Experiences catabolic reactions that cause an overall emission of energy.
|
Detailed explanation-1: -In the process of glycolysis, NAD+ is reduced to form NADH + H+. If NAD+ is not present, glycolysis will not be able to continue. During aerobic respiration, the NADH formed in glycolysis will be oxidized to reform NAD+ for use in glycolysis again.
Detailed explanation-2: -Answer and Explanation: A molecule becomes reduced when NAD+ gains a hydrogen atom because it gains an electron, causing it to become reduced. The NAD+ becomes reduced when it gains an electron, and the other molecule that donates the electron becomes oxidized.
Detailed explanation-3: -Oxidation and Reduction Reduction is when a molecule gains electrons, such as when NAD+ gains the electrons from a hydride to become NADH. In this case, we say that NAD+ has been reduced to NADH. Oxidation is when a molecule loses electrons, such as when NADH loses its hydride to become NAD+.
Detailed explanation-4: -The cofactor is, therefore, found in two forms in cells: NAD+ is an oxidizing agent, accepting electrons from other molecules and becoming reduced; with H+, this reaction forms NADH, which can be used as a reducing agent to donate electrons.