Photosynthesis Test

Result

Photosynthesis Test - 11

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Photosynthetically active radiation (PAR) represents which of the following range of wavelength?

A
340-450 nm

B
400-700 nm

C
450-950 nm

D
500-600 nm

Solution

Photosynthetically Active Radiation (PAR) of solar radiation is a visible region. It consists of radiations having wavelengths between 400 to 700 nm.
Question 2
1 / -0

Who described the first action spectrum for photosynthesis?

A
T. W. Engelmann

B
Cornelius van Niel

C
Joseph Priestley

D
Julius von Sachs

Solution

Engelmann used a prism to split light into its spectral components, and then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria.
The bacteria were used to detect the sites of oxygen evolution. He observed that bacteria mainly accumulated in the region of blue and red light of the split spectrum, thus giving the first action spectrum of photosynthesis.
Question 3
1 / -0

In the half-leaf experiment of photosynthesis, KOH solution is used because:

A
It provides O₂ to the leaf.

B
It provides moisture to the leaf.

C
It helps in CO₂ fixation.

D
It absorbs CO₂.

Solution

KOH (Potassium Hydroxide) absorbs carbon dioxide. The leaf inside the bottle containing KOH solution does not become blue-black when compared with the leaf which is exposed to atmospheric air. This shows that carbon dioxide is necessary for photosynthesis.
Question 4
1 / -0

Who demonstrated the importance of sunlight for the process of photosynthesis?

A
Robert Hill

B
Engelmann

C
Jan Ingenhousz

D
Joseph Priestley

Solution

Jan Ingenhousz is best known for his discovery of photosynthesis, the process by which green plants absorb carbon dioxide in the presence of sunlight and release oxygen
Question 5
1 / -0

In the overall process of photosynthesis, the total number of CO₂, water, sugar and O₂ molecules utilised and produced is:

A
13

B
19

C
12

D
31

Solution

(Total molecules utilized are 18 and produced are 13. Therefore total is 31)