Metabolism and Energies 1 Flashcards


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1

The sum of all of the biochemical processes going on within the human body at any given time is called

metabolism

2

Reactions within the _______ provide most of the energy needed by a typical cell.

the mitochondria

3

What percent of energy released from catabolism is lost as heat?

60%

4

The study of the flow of energy and its transformations is called

energetics

5

The chemical equation that correctly summarizes the overall reaction in oxidative phosphorylation is

2 H2+ O2= 2 H2O

6

The function of the citric acid cycle is to

remove hydrogen atoms from organic molecules and transfer them to coenzymes

7

In the ETS, _______ accepts electrons from one molecule and transfers them to another.

a coenzyme

8

Each cytochrome contains a(n)

metal ion

9

In order for glycolysis to proceed, which of the following need not to be present?

acetyl-CoA

10

The ______ of the mitochondria contains large-diameter pores that are permeable to ions and small organic molecules such as pyruvic acid.

outer membrane

11

The citric acid cycle

begins with the formation of a molecule of citric acid.

12

The carbon dioxide of respiration is formed during

the citric acid cycle.

13

In glycolysis, each molecule of glucose that is catabolized gives a net yield of how many molecules of ATP?

2

14

The strategy of eating starchy foods for several days before an athletic event is known as

carbohydrate loading

15

Although other nutrients can feed into the citric acid cycle, ______ yields energy the quickest.

glucose

16

The major steps in oxidative phosphorylation include all of the following except

the breaking of carbon-carbon covalent bond

17

In oxidative phosphorylation, energy for the synthesis of ATP is directly obtained from the

movement of hydrogen ions through channels in the inner mitochondrial membrane.

18

How many net ATP molecules are produced by the complete metabolism (all pathways) of one glucose molecule?

36 ATP

19

What is the role of NADH in metabolism?

transport hydrogen atoms to coenzymes

20

The citric acid cycle occurs in the

mitochondrial matrix

21

Hydrogen atoms from one FADH2 from the citric acid cycle produce how much ATP in the electron transport system?

2 ATP

22

When NAD+ is _______ it becomes NADH. When NADH is _____ it becomes NAD+.

reduced; oxidized

23

Oxygen is an important molecule in what?

citric acid cycle and ETS

24

If 8 molecules of NADH from the citric acid cycle entered the ETS, how much ATP would be produced?

24 ATP

25

The citric acid cycle is an aerobic process because

oxygen is needed to remove carbon atoms as carbon dioxide