Can you please help me with a simple and short answers please. Also no meed for
ID: 3511542 • Letter: C
Question
Can you please help me with a simple and short answers please. Also no meed for explanation i just need answers.Thank you Contemporary Biological Problems Lalb Laboratory Review 6 1. How are plant pigments involved in photosynthesis? 2. Why is it beneficial to have several different plant pigments involved in photosynthesis? 3. On what basis does chromatography separate substances? 4. Some types of red algae carry on photosynthesis 70 m beneath the ocean surface. What color light do you predict does not penetrate to this depth? Consider the following reaction: carbonic acid 5. Phenol red, a pH indicator, turns yellow (indicating acid) when you breathe into a solution. How does the reaction explain why the solution turned acidic? 6. When light is available and a plant is added, the solution returns to its original red color. Why does this occur? Gas exchange occurs in both photosynthesis and cellular respiration. Contrast these two processes by completing the following table: Organelle Gas Given Off Gas Taken Up 7- Photosynthesis 8. Cellular respiration 9. What experimental conditions were used in this laboratory to test for cellular respiration in photosynthesizing plant cells? Suppose you replaced Elodea with animal cells in an experimental test tube testing for photosynthesis. Would the results differ according to the use of a white light or no light?- 10. Explain. connect McGraw-Hill Access Science Website An online encyclopedia of science and technology LEAR LEARNSMART
Explanation / Answer
1. The main plant pigments namely chlorophyll- a, and b, are responsible for trapping light energy in the form of photons. The energy from these photons are used by the photosystem to drive the photosynthetic pathway, which results in production of carbohydrate, and release of oxygen.
2. Several different pigments trap light of different wavelengths. This ensures that photosynthesis can be carried out over a wide spectrum of light energies.
3. It works on the principle of 'partition co-efficient', where molecules have different affinities for solvent and substrate.
4. Red light does not penetrate beyond 35m, whereas blue and violet can penetrate as deep as 500m
5. Our breath contains CO2, which mixes with water to form carbonic acid. Carbonic acid produces some hydrogen ions (H^+). This acid is detected by the reagent.
6. The plant uses the availbale carbon for photosynthesis , and therefore shifts the equation to the left. Acidic content is reduced, due to which colour of solution turns back to normal.
7. Photosynthesis
Organelle: Chloroplast
Gas Given off: oxygen
Gas Taken up: CO2
8. Cellular respiration
Organelle: Mitochondrion
Gas Given off: CO2
Gas Taken up: Oxygen
9. Conditions included light, plant cells of Elodea, phenol red indicator, and source of CO2 ( from breath)
10. There will no difference in results.
There will no change in colour. because animal cells do not contain chloroplast, and cannot perform photosynthesis. Therefore, they cant use CO2 from solution, and color wont return to normal.