Topical+Essential+Questions

//** __Bio practical__

Reactions: - Blue methylene blue is reduced to a colourless methlene blue - Can be oxidised back to blue - What needs to be present to carry out this reduction/ oxidation? Live yeast

Dark blue cells - dead yeast cells. It is dead because when the methylene blue enters the dead yeast cells, they are unable to decolourise the methylene blue.

Light blue cells - live yeast cells. The methylene blue molecules are small enough to go through the cell walls of the yeast cells. Therefore, the live yeast cells are able to decolourise the methylene blue.

1. What is the relationship between energy and matter?**//

Matter needs energy to perform various processes. Energy can be used to transform matter and matter can store energy.


 * //2. How is the energy significant to biological system?

To carry on life processes; Respiration, Building up protein

3. Can an organism survive without the exchange of matter with its environment?

No?

4. Are all matters living and all living organisms made of matter?

Yes

5. Can living organisms create and destroy energy?

No, living organisms cannot create energy, we conserve energy. We cannot destroy energy as well, we transform and transfer energy.

6. Can living organisms create and destroy matter?

No.

//**//__Matters, System & Organisation__

- Photosynthesis; Anabolism - Respiration; Catabolism**//
 * - Macromolecules

- Why do we need to respire? - Do the structure and organisation of the living system change when energy is released from them? - How are the respiratory systems of animal organised efficiently to carry out its function? - Can these be any metabolism without enzymes? Enzymes lower activation energy, hence able to speed up the reaction of metabolism.

Unit enduring Understanding

2. Processes of the release of energy is affected by external environment. 3. The structure and organisation of the respiratory system is dictated by the function that it serves. 4. Metabolic pathway is a sequence of enzyme-controlled reactions.**
 * 1. Living organisms release energy within the biological molecule into forms they can use to carry out in life processes.