Energy+-+Questions

 1) What is the relationship between energy and matter? -energy is needed for matter to change states -matter requires energy for life processes -matter can store energy

2) How is energy significant to biological system? -survival of the biological system depends on the conversion of energy from one form to another to carry out life processes e.g. respiration

3) Can an organism survive without the exchange of matter with its environment? -no, changes in the organism are dependent on its environment -living organisms require matter and energy to maintain its complexity and organisation -all life processes require exchange of matter to some extent e.g. photosynthesis

4) Are all matters living and all living organisms made of matter? -no, not all matters are living, but all living organisms are made of matter

5) Can living organisms create and destroy energy? -no, energy can only be converted/transferred from one form to another

6) Can living organisms create and destroy matter? -no, they can only change matter

Autotroph - able to make their own energy and store it Heterotroph - other forms of feeding

Difference between photosynthesis and respiration: -photosynthesis starts with simple materials and end up with complex material (build up - anabolism) -respiration starts with complex material to simple materials (break down - catabolism) -something like the reverse of each other

Respiration essential questions: Why do we need to respire? -because it gives you energy to perform life processes

Do the structure and organisation of the living system change when energy is released from them?

How are respiratory systems of animals organized efficiently to carry out its functions?

Can there be any metabolism without enzymes? -no -enzymes catalyse(speed up) reactions -enzymes lower the activation energy of the matter it is working on, hence able to speed up the reaction