bioenergetics

Question 1

what is meant by limiting factors

Answer 1

A factor which is not at an optimum level to enable maximum rate

Question 2

Name the raw materials needed by a plant for photosynthesis

Answer 2

Carbon dioxide and water

Question 3

Name the green pigment present in plant cells.

Answer 3

Chlorophyll

Question 4

What is the role of this green pigment

Answer 4

To transfer energy from the environment and use it to synthesise glucose from carbon dioxide and water.

Question 5

Name three processes that organisms require energy for.

Answer 5

Chemical reactions to build larger molecules, keeping warm and movement

Question 6

What does the chemical formula C6H12O6 represent

Answer 6

Glucose

Question 7

Why is fermentation of economic importance

Answer 7

Used in the manufacture of bread and alcoholic drinks.

Question 8

If exercise carries on for a long time, what happens to the muscles

Answer 8

Muscles become fatigued and stop contracting efficiently.

Question 9

Why is respiration described as an exothermic reaction?

Answer 9

Respiration is an exothermic reaction because it transfers energy to the environment

Question 10

What is meant by the oxygen debt

Answer 10

The amount of extra oxygen which is needed to remove all lactic
acid from the body is known as the oxygen debt.