Slide Show Window Help Lab 7 Reviewlll View 9 Convert to Picture Shapes Tex Smar

Question

Slide Show Window Help Lab 7 Reviewlll View 9 Convert to Picture Shapes Tex SmartArt Box Take home Quiz Seven 1. Define: autotroph. 2. How does photosynthesis relate to the cellular respiration equation? 3. How are plant pigments involved in photosynthesis? Why is it beneficial to have several different plant pigments involved in photosynthesis? 5. What are the two main steps of photosynthesis? 6. What occurs during the light dependent step? 7. What occurs during the light independent step? What are pigments? Give an example of a plant pigment. 9. What is TLC? LO What is the RF value? How is it calculated?

Explanation / Answer

1. Autotroph:

Auto - self, troph - food. Autotrophs are those which are able to produce its own food. It uses inorganic substances and light energy to produce complex substances the carbohydrates, proteins and fats. They are also called producers.

2. How does photosynthesis relate to the cellular respiration equation?

Photosynthesis

6CO2 + 6H2O C6H12O6+ 6O2

Cellular respiration:

C6H12O6 + 6O2 6CO2 + 6H2O

3. How are plant pigments involved in photosynthesis?

Plant pigments absorbs sunlight as the source of energy to undergo photosynthesis.

4. Why it is beneficial to have several different plant pigments involved in photosynthesis?

Different pigments absorb different wavelength of light which is used in photosynthesis.

5. What are the two main steps of photosynthesis?

Two main steps in photosynthesis

6. What occurs during light dependent step?

During light dependent step, the light energy is trapped by the chlorophyll present in the chloroplast and is used up in the generation of ATP and NADPH.

2 H2O + 2 NADP+ + 3 ADP + 3 Pi + light 2 NADPH + 2 H+ + 3 ATP + O2

7. What occurs during light independent step?

During light independent reaction or the calvin’s cycle, the NADPH and ATP is used to form carbohydrates.

NADPH is oxidised to electrons:

12NADPH+12H----à12NADP+24H+24e

ATP is hydrolysed:

18ATP+18H2O--à18ADP+18pi

Synthesis of glucose:

6CO2+24e+24H--àC6H12O6+6H2O

8. What are pigments? Give example of a plant pigment.

Pigments are chemical compounds which absorb certain wavelength and reflect certain wavelength.

Carotenoids – are red, orange or yellow pigments

Phycocyanin – blue, phycoerythrin – red in cyanobacteria.

9. What is TLC

TLC is thin layer chromatography. It is the separation technique which is used to separate mixture of components using a stationary phase.

10. What is the RF value? How it is calculated?

After the separation is done using TLC, the components appear as spots. Each spot has RF factor- retention factor which is distance travelled by the sample by the distance covered by the solvent.

RF= distance travelled by sample / Distance travelled by solvent

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