Bioenergetics

Question 1

How is energy transferred in photosynthesis?

Answer 1

Energy is taken from carbon dioxide, and energy is stored in glucose

Question 2

What factors might affect photosynthesis?

Answer 2

Light, carbon dioxide, temperature

Question 3

How does temperature affect photosynthesis?

Answer 3

If the temperature is too cold, photosynthesis won’t happen at all

If it is too hot, then the enzymes will denature, and photosynthesis won’t be able to happen

Question 4

How does light intensity affect photosynthesis?

Answer 4

If there isn’t enough carbon dioxide, the plant won’t be able to take in a sufficient amount for photosynthesis. Nothing will happen

Question 5

Is respiration endothermic or exothermic and why?

Answer 5

Exothermic because it transfers energy to the environment

Question 6

What is the word equation for respiration?

Answer 6

Glucose + oxygen –> carbon dioxide + water

Question 7

What is anaerobic respiration?

Answer 7

Respiration without oxygen. (The incomplete breakdown of glucose)

Question 8

What is respiration?

Answer 8

Respiration is the process of transferring energy from glucose, which goes on in every cell

Question 9

When is anaerobic respiration used?

Answer 9

When doing vigorous exercise and there isn’t enough oxygen supply to the muscles

Question 10

What is the word equation for anaerobic respiration?

Answer 10

Glucose–> energy + lactic acid

Question 11

Can plants and yeast respire without oxygen too?

Answer 11

Yes

Question 12

What is the word equitation for anaerobic respiration in plant and yeast cells?

Answer 12

Glucose–> ethanol + carbon dioxide

Question 13

What is anaerobic respiration called in yeast cells?

Answer 13

Fermentation

Question 14

What is fermentation used for in the food industry?

Answer 14

It’s used to make bread, the carbon dioxide from fermentation is what makes the bread rise

Also it’s used to make alcoholic drinks (beer and wine). The fermentation process is the process produces alcohol

Question 15

What is an oxygen debt?

Answer 15

It’s the amount of extra oxygen your body needs after exercise

Question 16

Define metabolism

Answer 16

Metabolism is all the chemical reactions in an organism

Question 17

What do sugars do?

Answer 17

Glucose is broken down in respiration

Question 18

What do amino acids do?

Answer 18

They are used to build up proteins.

Question 19

What are excess proteins?

Answer 19

They are broken down in a reaction To produce urea. Urea is excreted in urine

Question 20

What do fatty acids do?

Answer 20

Fatty acids and glycerol make fats. Lipid molecules are each made from one molecule of glycerol and three fatty acids

Question 21

What do carbohydrates do?

Answer 21

It is important in hormones and it provides energy and absorbs food

Question 22

What are proteins broken down into?

Answer 22

Amino acids

Question 23

How can you increase respiration in your cells?

Answer 23

Your breathing rate increases
Your breath volume (how deep the breaths you take are) increases
Your heart rate increases