T.W. Engelmann Experiments

Q. Is there a complete one-to-one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis?

Q. The experimental material that was used in T.W. Engelmann’s experiment was

1. Ulothrix
2. Cladophora
3. Spirogyra
4. Vaucheria

Q.

What did Cornelius van Niel demonstrate about Photosynthesis?

Q. Pick the right option regarding aerobic bacteria used in T.W. Engelmann’s experiment from the given options.

1. Splits light into its spectral components
2. Grows/accumulates in the region where production of oxygen is optimum
3. Acts as a monochromator when light passes through it
4. Accumulates in the region which lacks oxygen

Q. The first action spectrum of photosynthesis was first discovered by:

1. Van Neil
2. Jan Ingenhousz
3. Julius von Sachs
4. Engelmann

Q.

What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

1. Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.

2. Bacteria released excess carbon dioxide in these areas.

3. Bacteria congregated in these areas because these areas had the most oxygen being released.

4. Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.

Q. Action spectrum of photosynthesis was described by

1. Robin Hill
2. Joseph Priestley
3. Julius von Sachs
4. T.W. Engelmann

Q. If Engelmann's experiment was repeated without passing light through a prism, then

1. no difference in result is observed
2. bacteria will evenly distribute along the length of the algae
3. number of bacteria would decrease due to increase in carbon dioxide
4. number of bacteria would increase due to decrease in carbon dioxide

Q. Emerson effect shows the existence of

1. photophosphorylation
2. photorespiration

3. two distinct photochemical reactions

4. light and dark reactions

Q. An outcome of Engelmann's experiment is

1. the relationship between heterotrophic and autotrophic bacteria
2. the relationship between wavelength of light and rate of aerobic respiration
3. the relationship between light and the amount of heat released
4. lthe relationship between light and oxygen released during photosynthesis

Q. Anoxygenic photosynthesis is characteristic of

1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva

Q.

An outcome of Englemann experiment was to help determine

1. the relationship between heterotrophic and autotrophic organisms

2. the relationship between wavelengths of light and the rate of aerobic respiration.

3. the relationship between wavelengths of light and the oxygen released during photosynthesis.

4. the relationship between wavelengths of light and the amount of heat released.

Q. What did Engelmann conclude from the congregation of bacteria in the red and blue areas?

1. Bacteria congregate in these areas because these areas had the most oxygen released
2. Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths
3. Bacteria congregate in these areas due to an increase in the temperature of red and blue light
4. Bacteria release excess carbon dioxide in these areas

Q. Pick the right option regarding aerobic bacteria used in T.W. Engelmann’s experiment from the given options.

1. Splits light into its spectral components
2. Grows/accumulates in the region where production of oxygen is optimum
3. Accumulates in the region which lacks oxygen
4. Acts as a monochromator when light passes through it

Q. On which of the following organisms did Nicolas Theodore De Saussure conduct his experiment?

1. Blue green algae
2. Purple and green sulphur bacteria
3. Cladophora
4. Periwinkle

Q. Dispersion of light was achieved in T.W. Engelmann’s experiment by using

1. glass prism
2. gemstone
3. quartz
4. none of the above

Q. Pick out the two wavelengths of light that corresponded to high bacterial growth in the scientist's experiment who gave the first action spectrum of photosynthesis.

1. Green, red
2. Blue, green
3. Red, blue
4. Yellow, green

Q. Action spectrum of photosynthesis was described by

1. Robin Hill
2. Julius von Sachs
3. Joseph Priestley
4. T.W. Engelmann

Q. .......... is a CAM plant.

1. Maize
2. Pineapple
3. Onion
4. Pea

Q. Match the following scientists with their discoveries. Scientist Discovery

A.	Engelmann	I.	Chemical composition of chlorophyll and carotenoids
B.	Willstatter and Stoll	II.	$C_4$ cycle
C.	Hatch and Slack	III.	In the presence of light, isolated chloroplast from green leaves reduce a variety of compounds
D.	Robert Hill	IV.	Green substances is located within special bodies in plants

1. A-IV, B-I, C-II, D-III
   
2. A-I, B-II, C-III, D-IV
3. A-IV, B-III, C-II, D-I
4. A-I, B-IV, C-III, D-II

Q. What did Engelmann conclude from the congregation of bacteria in the red and blue areas?

1. Bacteria release excess carbon dioxide in these areas
2. Bacteria congregate in these areas due to an increase in the temperature of red and blue light
3. Bacteria congregate in these areas because these areas had the most oxygen released
4. Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths

Q. If Engelmann's experiment was repeated without passing light through a prism, then

1. no difference in result is observed
2. bacteria will evenly distribute along the length of the algae
3. number of bacteria would decrease due to increase in carbon dioxide
4. number of bacteria would increase due to decrease in carbon dioxide

Q. The experimental material that was used in T.W. Engelmann’s experiment was

1. Cladophora
2. Ulothrix
3. Vaucheria
4. Spirogyra

Q. The first action spectrum of photosynthesis was first discovered by:

1. Van Neil
2. Jan Ingenhousz
3. Julius von Sachs
4. Engelmann

Q. Which of the following are correctly matched?

$\begin{array}{ccc}& \text{Element}& \text{Characteristic/Role}\\ \text{A}& \text{Magnesium}& \text{Component of}\\ & & \text{energy related chemical}\\ & & \text{compound}\\ \text{B}& \text{Manganese}& \text{Nitrogen metabolism}\\ \text{C}& \text{Copper}& \text{Pollen germination}\\ \text{D}& \text{Calcium}& \text{Formation of mitotic}\\ & & \text{spindle}\end{array}$

1. Only A and D
2. Only B and C
3. A, C and D
4. A, B and D

Q. Pick out the two wavelengths of light that corresponded to high bacterial growth in the scientist's experiment who gave the first action spectrum of photosynthesis.

1. Green, red
2. Blue, green
3. Yellow, green
4. Red, blue

Q. Van Helmont concluded that plants get their food from

1. Air
2. Water
3. Humus
4. Air and $H_{2}O$

Q.

What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

1. Bacteria released excess carbon dioxide in these areas.

2. Bacteria congregated in these areas due to an increase in the temperature of the red and blue light.

3. Bacteria congregated in these areas because these areas had the most oxygen being released.

4. Bacteria are attracted to red and blue light and thus these wavelengths are more reactive than other wavelengths.

Q. What conclusion was drawn from red drop and enhancement experiments in the light reaction of photosynthesis

1. One photosystem is present
2. Two photosystems are present
3. Two photosystems are present which work at different wavelengths
4. Two photosystems are present which work at same wavelength

Q.

An outcome of Englemann experiment was to help determine

1. the relationship between heterotrophic and autotrophic organisms

2. the relationship between wavelengths of light and the rate of aerobic respiration.

3. the relationship between wavelengths of light and the amount of heat released.

4. the relationship between wavelengths of light and the oxygen released during photosynthesis.