Chapter 15: Metabolism Flashcards Preview

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Flashcards in Chapter 15: Metabolism Deck (27):
1

Entire set of cellular metabolic reactions

Intermediary metabolism

2

Metabolic pathways can be divided into two types:

Anabolic and Catabolic

3

Anabolic

use ATP and reducing power to synthesize large biomolecules

4

Catabolic

produce ATP and combust carbon fuels to synthesize ATP

5

Amphibolic pathways can function...

Anabolically or catabolically (TCA can function as either depending on needs)

6

ATP consists of..

Adenine, ribose and triphosphate units (Tri-P contains the energy)

7

Hydrolysis of ATP is...

Exergonic (energy release)

8

The triphosphate unit of ATP contains two...

Phosphoanhydride bonds that are unstable

9

When phophoanhyride bonds are hydrolyzed,

They release a lot of energy for metabolic reactions and can assume a more stable state

10

Energy released by ATP hydrolysis powers...

Cellular functions

11

What is phosphoryl-transfer potential?

Standard free energy of hydrolysis - means of comparing the tendency of organic molecules to transfer a phosphoryl group to an acceptor molecule

12

ATP has a high

Phosphoryl transfer potential to earn stability

13

ATP turnover is very ____ and the amount of ATP is very ______.

High Limited

14

ATP must be ____________ to provide energy to power the cell.

Constantly recycled *Cells use and generate ATP at the same time, very busy*

15

How much ATP is needed for one day to survive?

Over 80lb of ATP

16

ATP is an activated carrier of phosphoryl groups. Other activated carriers are often derived from...

Vitamins

17

Activated carriers for electrons for fuel oxidation (used for ATP synthesis)

NADH (must be regenerated all the time) FADH2

18

Most activated carriers are limiting because they derive from vitamins. Why?

We cannot synthesize vitamins but they are essential in our diets

19

Activated carriers of electrons for reductive biosynthesis

NADPH (used for ATP)

20

The reactive part of NAD+ is the _____ and synthesized from _____.

Nicotinamide Ring and synthesized from the vitamin niacin

21

Nicotinamide Ring accepts ________ and ______ (NADH)

1 hydrogen ion and 2 electrons

22

The reactive part of FAD is the ________ - derived from _______.

Isoalloxazine Ring - derived from vitamin riboflavin

23

FAD accepts ______ and _______ (FADH2)

2 protons and 2 electrons

24

NADP+ is the ________ for reduction biosyntheses.

Electron donor

25

NADPH is used primarily for _________.

Reductive biosyntheses

26

NADH is used for __________.

Generation of ATP

27