Jan Ingenhousz Experiment

Q.

Which of the following gases retards the rate of photosynthesis?

1. $\mathrm{CO}$

2. ${\mathrm{NO}}_2$

3. ${\mathrm{CO}}_2$

4. $\mathrm{CFC}$

Q. Breakdown of proton gradient developed during chemiosmosis leads to the release of:

1. Oxygen
2. Water
3. Energy
4. Glucose

Q. First photosynthetic organisms to appear on earth were

Q.

Describe the factors affecting rate of photosynthesis.

Q.

What does photophosphorylation means?

Q. In Ingenhousz's experiment, which among the following was responsible for the appearance of small bubbles around the green parts of the aquatic plant in the presence of sunlight?

1. Carbon dioxide
2. Chlorine
3. Oxygen
4. Boron

Q.

Photosynthesis occurs in all cells.

1. True
2. False

Q. write the four factors needed for chemo omosis to take place

Q.

15 The gas that helps to break down food in our body and thus release energy is

1. oxygen

2. carbon dioxide

3. hydrogen

4. nitrogen

Q. If the rate of photosynthesis of a plant in the light of wavelength 680 nm is X and in the wavelength of 700 nm it is Y. And the rate of photosynthesis when both lights are applied simultaneously is Z. Then,

1. Z < (X + Y)
2. X = Y = Z
3. Z = X + Y
4. Z > (X + Y)

Q.
Define transpiration. Describe a simple experiment to demonstrate this phenomenon. In what way is transpiration important for plants?

Q. In Ingenhousz's experiment, which among the following was responsible for the appearance of small bubbles around the green parts of the aquatic plant in the presence of sunlight?

1. Carbon dioxide
2. Oxygen
3. Boron
4. Chlorine

Q. Chloroplast involvement in photosynthesis was discovered by

1. Julius von Sachs
2. Mayer
3. Ingenhousz
4. Liebig

Q. Lichens and mycorrhiza are

1. saprophytes
2. parasites
3. symbionts
4. both b and c

Q. How would you demonstrate the green plants release oxygen when exposed to light?

Q. Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by

1. Jean Senebier
2. Melvin Calvin
3. Julius Robert Mayer
4. Pelletier and Caventou

Q. Who stated that in photosynthesis light energy is converted into chemical energy?

1. R. Mayer
2. Willstatter and Stoll
3. Arnon
4. Calvin.

Q. First photosynthetic organisms to appear on earth were:

1. Bryophytes
2. Bacteria
3. Green algae
4. Cyanobacteria

Q.

Evidence of existence of two pigment system in light reaction was given by

1. Arnon

2. Emerson

3. Sachs

4. Clavin

Q. The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes formation of ATP because

1. A proton gradient develops across inner membrane
2. High energy bonds are formed in mitochondrial proteins
3. There is change in permeability of inner mitochondrial membrane towards ADP.
4. ADP is pumped out from matrix into inter membrane space.

Q. Ingenhousz's experiment demonstrated that

1. None of the above
2. Sunlight is essential for plants to produce oxygen
3. Oxygen is produced by plants
4. Sunlight is not essential

Q. Who discovered that green plant parts and light are essential for photosynthesis?

1. Engelmann
2. Priestley
3. Ingenhousz
4. Sachs

Q. What did Engelmann observe from his prism experiments?

1. Bacteria released excess carbon dioxide in red and blue light
2. Bacteria could not detect the sites of $O_2$ evolution
3. Bacteria accumulated due to increase in temperature caused by increase in $O_2$ concentration
4. Bacteria are accumulated towards red and blue light

Q. Scientist who discovered the role of light in photosynthesis was

1. Sachs
2. Jan Ingenhousz
3. Senebier
4. Priestley

Q. In an experiment, demonstrating the evolution of O₂ in Hydrilla, sodium bicarbonate is added to water in the experimental setup. If all other conditions are favorable, what would be the end result?

1. Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate.
2. Amount of oxygen evolved increases as the availability of CO₂ increases.
3. Amount of oxygen evolved decreases as the availability of carbon dioxide increases.
4. Amount of O₂ evolved increases as CO₂ in water is absorbed by sodium bicarbonate.

Q. Is photo respiration active at low light intensity ?
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Q. The air contaminated by the burning of a candle could not support life in a mouse but support the life in plants. This experiment was demonstrated by

1. Lavoisier
2. Priestely
3. Von Mayer
4. None of the above

Q. Choose the incorrect statement from the following.

1. T. W. Engelmann based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide to carbohydrates.
2. Julius von Sachs found that the green parts in plants is where glucose is made, and that the glucose is usually stored as starch.
3. Joseph Priestley performed a series of experiments that revealed the essential role of air in the growth of green plants.
4. Ingenhousz in an experiment with an aquatic plant showed that
   in bright sunlight, small bubbles were formed around the green parts while in the dark they did not.

Q. Which one of the following seldom act as a limiting factors in photosynthesis?

1. Temperature
2. Light
3. Water
4. $C{O}_2$

Q. The role of light in photosynthesis was first discovered by

1. Senebier
2. J. Priestley
3. Sachs
4. Ingenhouz