B4.3

Question 1

Where does aerobic respiration take place?

Answer 1

In animal and plant cells and some microorganisms

Question 2

What does aerobic respiration require?

Answer 2

Oxygen

Question 3

Aerobic respiration word equation

Answer 3

glucose + oxygen—> carbon dioxide+water (+ energy released)

Question 4

Aerobic respiration symbol equation

Answer 4

C6H12O6 + 6O2 —> 6CO2 + 6H2O

Question 5

Where does anaerobic respiration take place?

Answer 5

In animal,plant and some microbial cells in conditions of low oxygen or absence of oxygen

Question 6

Examples of where anaerobic respiration occurs

3

Answer 6

• plant roots in waterlogged soil
• bacteria in puncture wounds
• human cells during vigorous exercise

Question 7

Anaerobic respiration in animal cells and some bacteria equation

Answer 7

glucose —> lactic acid (+ energy released)

Question 8

Anaerobic respiration in plant cells and some micro organisms including yeast word equation

Answer 8

glucose —> ethanol + carbon dioxide (+ energy released)

Question 9

Aerobic respiration releases more what than anaerobic respiration?

Answer 9

More energy per glucose molecule

Question 10

Circular DNA-only in what cells?

Answer 10

Bacterial cells

Question 11

Cell wall…only in what cells?

Answer 11

YEAST and bacterial

Question 12

Mitochondria….only in what cells?

Answer 12

Animal and YEAST

Question 13

How is fermentation used in bread production

Answer 13

The microorganism YEAST ferments the flour which contains glucose and releases carbon dioxide to make the bread rise

Question 14

Describe how fermentation is used in the production of alcohol

Answer 14

The YEAST ferments the sugar to make ethanol - the sugar is in things such as grapes (wine) and barley (beer)

Question 15

Describe how fermentation is used in biogas

Answer 15

Microorganisms ferment plant and animal waste which contains glucose
This produces mainly methane and carbon dioxide

Question 16

All living organisms require energy released by respiration for some chemical reactions in cells,including chemical reactions involved in what?

Answer 16

Movement
Synthesis of large molecules
Active transport

Question 17

What is biogas used for?

Answer 17

lighting or heating.

Question 18

Amino acids are synthesised from what?

Answer 18

Glucose and nitrates

Question 19

Proteins are made in ____ ______ and _______ cells from what?

Answer 19

Plant
Animal
Bacterial

From strings of Amino acids joined together

Question 20

Larger molecules (such as what) are synthesised from what? (Such as….)

Answer 20

Such as starch and cellulose

Are synthesised from smaller molecules such as Glucose in plant cells

Question 21

What does the molecules synthesising involve?

Answer 21

Joining the glucose molecules (monomers) together to form a polymer.