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A leaf of destarched healthy potted plan...

A leaf of destarched healthy potted plant was covered by black paper strip as shown in Figure I, and kept in sunlight in the morning. In the evening, it was plucked off and tested for the presence of starch by using iodine solution.

The observation is matched with the Figure No.:

A

II

B

III

C

IV

D

V

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The correct Answer is:
A
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A protion of destarched leaf of a potted plant was covered with a black strip of paper. The plant was then exposed to sunlight for six hours and then tested for starch. It was observed that:

A portion of each of four destarched leaves of a plant was covered with paper strips of various kinds. The plant was exposed to sunlight for 5 hours. Thereafter, the strips were removed and the leaves tested for starch in the covered portion. Which one of the four leaves gave the starch test in the covered portion?

A star-shaped figure was cut in the black paper strip used for covering the leaf of a destarched plant used for demonstrating that light is necessary for photosynthesis. As the end of the experiment when the leaf was tested for starch with iodine, the star-shaped figure on the leaf was found to be:

A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in the Figure. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it ? (a) Explain why the milk sample was illuminated? Name the phenomenon involved. (b) Same results were not observed with a salt solution. Explain. (c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?

The steps taken for setting up an experiment to demonstrate that 'light is necessary for photosynthesis', were as follows: * A strip of black paper was clipped on the leaf of a potted plant * The plant was kept in the sun for four hours * The strip was removed and the leaf was placed in boiling alcohol in a water bath * The leaf was washed and tested for starch The result was not as expected. Identify the step which had been missed out:

The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y. This experimental set up is used to prove essentiality of which of the following requirements of photosynthesis?

The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y. Which of the following statements shows the correct results of Iodine Test performed on the leaf from plant X and Y respectively?

The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y. The function of KOH is to absorb

The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y. Which of the following steps can be followed for making the apparatus air tight? i. placing the plants on glass plate ii. using a suction pump. iii. applying aseline to seal the bottom of jar. iv. creating vacuum

LAKHMIR SINGH & MANJIT KAUR-MCQ SECTION-Exercise
  1. The steps taken for setting up an experiment to demonstrate that 'ligh...

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  2. Out of the following figures, choose the one showing the correct proce...

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  3. A leaf of destarched healthy potted plant was covered by black paper s...

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  4. In an experiment to test the presence of starch in a leaf, the plucked...

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  5. Why is some KOH placed in a small test tube in the flask with germina...

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  6. Which one of the following is the correct set of three precautions for...

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  7. The experimental set up shown here to demonstrate thet 'CO(2) is given...

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  8. The following experimental set-ups were kept in the laboratory to show...

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  9. In the experiment to show that CO(2) is given out during respiration b...

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  10. The most appropriate reason for taking germinating seeds in the experi...

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  11. Before setting up an experiment to show that seeds release carbon diox...

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  12. Which of the following precautions are to be taken for a successful ru...

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  13. The chemical required in the experiment to show that carbon dioxide ga...

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  14. In the experiment to demonstrate that CO(2) is given out during respir...

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  15. The experimental set up shown here to demonstrate thet 'CO(2) is given...

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  16. In the experiment to show that carbon dioxide is given out during resp...

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  17. An experimental set-up is given here to demonstrate that CO(2) is give...

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  18. The given slides A and B were identified by four students, I, II, III ...

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  19. The correct diagram showing an Amoeba undergoing binary fission is :

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  20. The figure given here shows:

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