At the end of cellular respiration, how many molecules of NADH are there? Group of answer choices a)2 b)6 c)0 d)4 e)8

Cells use two ways of storing potential energy: 1) as concetration gradients and 2) in molecules. A) Explain how energy can be stored in these two forms and how it can be used to do the work. B) Propose an analogy that can explain each these forms of energy storage using everyday items.

1)NADH is made from NAD+ by a)An oxidation-reduction reaction b)Oxidative phosphorylation c)A proton gradient d)A dehydration reaction e)Substrate-level phosphorylation 2. The energy used to make ATP via substrate-level phosphorylation is from a(n) a)Electron gradient b)Reduction reaction c)Phosphorylated molecule d)ADP molecule e) Protein gradient 3. Which of the following molecules, as written, is in its reduced form? a)NADH b)O2 c)NAD+ d)FAD e)CO2 4. Cellulose is a good structural molecule because a)The molecule is amphipathic, allow it to interact with water and nonpolar substances b)The bonds between the monomers are difficult to break, increasing its stability c)It is a mix of carbohydrate and protein, allowing it to form multiple types of bonds

Within the eukaryotic cell, the source of most of the energy stored in ATP is produced through the: a) breakdown of chlorophyll in the mitochondrion b) mitochondrion completing the oxidation of pyruvate (3 carbon chains) c) oxidation of glucose in the cytoplasm d) hydrolysis within the lysosome e) storage of glucose as glycogen by a storage vesicle