1. In an experiment to prove light is necessary for photosynthesis, a part of a destarched leaf is covered with black paper. After exposure to sun, the covered part does not turn blue-black with iodine because:
2. During Moll's half-leaf experiment, one half of the leaf is inserted into a bottle containing Potassium Hydroxide (KOH). The clinical purpose of KOH here is:
3. A student sets up an experiment with Hydrilla twigs in a beaker of water under a funnel. Bubbles are seen escaping into a test tube. These bubbles consist of:
4. Why must a leaf be boiled in methylated spirit (alcohol) before performing the starch test?
5. If an aquatic plant experiment is moved from a dim room to bright sunlight, the rate of bubble formation will:
6. A variegated leaf (e.g., Coleus) is used in experiments to prove that ______ is necessary for photosynthesis.
7. In the experiment using $NaHCO_3$ (Sodium bicarbonate) with Hydrilla, the purpose of adding the chemical is:
8. What is the clinical reason for using a "Water Bath" when boiling a leaf in alcohol?
9. If a destarched plant is placed in a $CO_2$-free environment for 5 hours in sunlight, and then tested for starch, the result will be:
10. An expert observes that the rate of photosynthesis in a greenhouse increases when the $CO_2$ level is raised to 0.05%. This is because:
11. Why do we keep a plant in a dark room for 48 hours before starting a photosynthesis experiment?
12. In a Hydrilla experiment, a glowing splinter is introduced into the test tube containing the gas. The splinter bursts into flame, proving the gas is:
13. Which logical conclusion is drawn if a leaf kept in a $CO_2$-rich environment in the dark shows no starch?
14. When testing a leaf for starch, after boiling in alcohol, the leaf is dipped in hot water. This is done to:
15. If blue light is replaced by green light in a photosynthesis experiment, the rate will:
16. An expert observes that after a long period of bright light, the rate of photosynthesis drops. This could be due to:
17. In the starch test, the "Blue-Black" color indicates the presence of starch. What color would the leaf be if starch was absent?
18. If a leaf is exposed to $O^{18}$ labeled $CO_2$ ($C^{18}O_2$), will the oxygen gas released be radioactive?
19. In a "Control" setup for Moll's experiment, the bottle should contain:
20. What is the logical reason behind "compensation point"?
