Biology C5 S1 Flashcards Preview

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Flashcards in Biology C5 S1 Deck (23):
1

decomposition reactions

reactions that break down their reactants

2

catabolic reactions

in metabolism, reactions that break down their reactants

3

exothermic

reactions that release heat

4

exergonic

reactions that release energy

5

entropy

a measure of order

6

What type of reaction is cell respiration?

decomposition
catabolic
exothermic
exergonic
increasing entropy

7

two types of cell respiration

anaerobic and aerobic

8

anaerobic respiration

respiration that does not require oxygen to occur

9

aerobic respiration

respiration that requires oxygen to occur

10

substrate-level phosphorlation

adding a phosphate group to a molecule using only enzymes

11

oxidative phosphorylation

adding a phosphate group to a molecule in the presence of oxygen

12

efficiency of cell respiration

about 40%

13

metabolism

total of all synthesis and decomposition reactions in an organism

14

During aerobic respiration, oxygen is what?

the oxidizing agent

15

What happens to oxygen during aerobic respiration?

it is reduced

16

Why is anaerobic respiration less efficient?

the food molecules are only partly decomposed and release less energy

17

What are the substrates need to start aerobic respiration?

glucose and glucose phosphate

18

What is the overall equation for cell respiration?

glucose + oxygen -> carbon dioxide + water + energy

19

Why can organisms not release all of the energy from glucose at once?

most of the energy would be wasted as heat that might kill the organism

20

1 gram of glucose = __ calories

1 gram of glucose = 3811 calories

21

1 muscle cell converts ADP+P to ATP at a rate of...

about 10 million molecules per second when working

22

The human body uses about ___ ATP molecules per second while resting.

1 million

23

An average adult needs about ___ kcal or Cal each day.

2200 kcal