Ch 6 quiz

Question 1

What metabolic pathway is common to both aerobic and anaerobic processes of sugar breakdown?

Answer 1

Gylcolysis

Question 2

Some friends are trying to make wine in their basement. They’ve added yeast to a sweet grape juice mixture and have allowed the yeast to grow. After several days they find the sugar levels in the grape juice have dropped, but there’s no alcohol in the mixture. What is the most likely explination?

Answer 2

The mixture needs less oxygen; yeast only produce alcohol in the absence of oxygen

Question 3

Because plants can do photosynthesis they are called?

Answer 3

Producers

Question 4

What is the name of the process in which pyruvic acid is converted to lactic acid?

Answer 4

Fermentation

Question 5

What must pyruvic acid be converted to before it can enter the citric acid cycle?

Answer 5

acetyl CoA

Question 6

____ is used as food and ____ is produced as a waste in the overall process of cellular respiration

Answer 6

Glucose; Carbon dioxide

Question 7

The first electron acceptor of cellular respiration is?

Answer 7

NAD+

Question 8

Where does electron transport take place?

Answer 8

Mitochondria

Question 9

What is the ultimate source of energy in food?

Answer 9

ATP

Question 10

The electrons removed from glucose in cellular respiration end up in?

Answer 10

Water

Question 11

What is a product of glycolysis?

Answer 11

Pyruvic acid

Question 12

Chemical reactions that require oxygen are called ____ while those that do not require oxygen are considered______

Answer 12

Aerobic; anaerobic

Question 13

What is the second stage of aerobic respiration?

Answer 13

The citric acid cycle

Question 14

ATP synthase plays a role in

Answer 14

Generating ATP

Question 15

What is oxidized during cellular respiration?

Answer 15

Glucose

Question 16

Human muscle cells use lactic acid fermentation to

Answer 16

Regenerate NAD+

Question 17

A difference between marathon runners and sprinters is

Answer 17

Marathon runners have more slow-twitch fibers in their leg muscles

Question 18

What is the oldest mechanism to generate ATP?

Answer 18

Glycolysis

Question 19

What waste product do yeast produce under aerobic conditions?

Answer 19

Ethyl alcohol

Question 20

What is the sequencing stage of cellular respiration?

Answer 20

Glycolysis, citric acid cycle, electron transport

Question 21

What is the equation for cellular respiration?

Answer 21

glucose + oxygen –> carbon dioxide + water + energy

Question 22

Large amounts of oxygen first appeared in the Earth’s atmosphere about ___ years ago

Answer 22

2.7 billion

Question 23

The main function of cellular respiration is

Answer 23

making ATP to power cell activities

Question 24

Plant cells have

Answer 24

chloroplasts and mitochondira

Question 25

Aerobic cellular respiration generates about ___ ATP from one glucose

Answer 25

32

Question 26

What compound directly provides energy for cellular work?

Answer 26

ATP

Question 27

An aerobic process requires

Answer 27

oxygen

Question 28

A glucose molecule is completely broken down upon completion of glycolysis and the citric acid cycle. However, these two processes yield only a few ATPs. Where is the rest of the energy that the cell can obtain from the glucose molecule?

Answer 28

in NADH and FADH2

Question 29

_____ is a chemical process that uses light energy from the sun to build organic molecules

Answer 29

photosynthesis