U3 Q6

ATP is an important biological molecule that transports chemical energy within cells and powers many biochemical reaction. Which of the following correctly describes the structure of ATP and how it provides energy?

ATP contains 5-carbon sugar, three phosphate groups, and and adenine base. energy is released when the bond between the second phosphate group and the third phosphate group is broken.

Chemiosmosis

ATP synthesis creates a proton gradient that causes electron flow through an electron transport chain (ETC)

NADH and FADH2 are electron carries that are involved in oxidative phosphorylation, the final step of cellular respiration. which of the following is true of electron carries NADH and FADH2 ?

All of the electrons that enter the transport chain (ETC) come from NADH and FADH2 molecules which are produced during earlier phases of cellular respiration

3-oxidative phosphorylation

Electrons are transferred to oxygen, causing it to split and take up H+ ions, which form water

2- oxidative phosphorylation

H+ ions are pumped across the mitochondrial membrane to establish an electrochemical gradient.

4-oxidative phosphorylation

H+ ions flow down the gradient to generate ATP

What is true of NAD in cellular respiration

NAD carries and transfers electrons and H+ ion, as well as carbon dioxide across the cell membrane

What occurs during the kreb cycle? (2)

NAD+ is reduced to form NADH Acetyl-CoA combines with oxaloacetate to form citrate.

Cellular respiration is a type of oxidation -reduction (redox) reaction. What is the getting oxidized and reduced during cellular respiration ?

The carbon atoms in glucose are oxidized, and oxygen is reduced.

1 -oxidative phosphorylation

electrons are transferred to molecules in the beginning of the ETC

reactant or product. CO2

product

reactant or product. FADH2

product

reactant or product . Acetyl-CoA

reactant

reactant or product. FAD

reactant