Laboratory Preparation A Quiz 11 LAB SECTION NO DATE Water in Plants; Respiratio
ID: 215669 • Letter: L
Question
Laboratory Preparation A Quiz 11 LAB SECTION NO DATE Water in Plants; Respiration; Digestion 1. What process or processes are being demonstrated with the aid of a potometer in this exercise? 2. For what purpose is an electric fan used in the first part of the exercise? 3. What may take place through hydathodes under certain environmental conditions? 4. In the experiment involving corn kernels, what is the purpose of adding a formalin solution to the dead seeds? 5. In what type of solution is the yeast suspension prepared? 6. What happens when carbon dioxide is bubbled through baryta water? 7. In this exercise, what is the source of the carbon dioxide that is bubbled through baryta water? 8. In living cells, which enzyme breaks up hydrogen peroxide molecules as they form? 9. When a drop of hydrogen peroxide is added to living cells, what gas is produced? 10. Would you expect the tetrazolium reagent to change color when applied to boiled tissuc? 11. What is the function of diastaseExplanation / Answer
1. To measure the rate of transpiration in the plants as it draws up water.
2. A fan was used to create wind (place at least 1 meter from the plant, on low speed, creating a gentle breeze)
3. guttation (loss of water in form of droplets - which is not pure water like transpiration, but it is mineral water)
4. to sterilize and make dry
5. molasses solution
6. BaCO3 precipitate forming (evidence of respiration release CO2)
7. cell, or plant, or animal (you have attended lab so accordingly you can conclude)
8. Catalase (hydrogen peroxide into water and oxygen)
9. O2
10. absence of respiration prevents formazan production making the dead seeds (aged tissue) will not chnage the colour.
11. it helps in breaking down of starch into maltose, the first enzyme discovered.
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