Photosynthesis in Higher Plants - Online Test
Q1. Each photosystem has all the pigments forming light harvesting system also called as
Answer : Option D
Explaination / Solution:
Each photosystem has all the pigments (except one molecule of chlorophyll a) forming a light harvesting system also called antennae. These pigments help to make photosynthesis more efficient by absorbing different wavelengths of light.
Q2. Carotenes protect plants from
Answer : Option C
Explaination / Solution:
Carotene is present in chloroplast along with chlorophyll pigment. This pigment protect the plants from photo-oxidation during photosynthesis at higher intensity of light.
Q3.
The excitation of electrons,finally down-hill to causing it to be reduced to is called as
Answer : Option C
Explaination / Solution:
Excitation of electrons, transfer to another accepter, and finally down-hill to causing it to be reduced to is called the Z scheme.
Q4. Which is the most effective wavelength of light for photosynthesis?
Answer : Option B
Explaination / Solution:
Certain red and blue wavelengths of light are the most effective in photosynthesis because they have exactly the right amount of energy to energize, or excite, chlorophyll electrons and boost them out of their orbits to a higher energy level.
Q5. Electrons from excited chlorophyll molecules of photosystem II to photosystem I transferred and finally convert
Answer : Option A
Explaination / Solution:
After absorbing light,electrons are excited and transferred through PS II and PS I and finally to NAD forming NADH.
Q6. Which of the following stages of calvin cycle are in correct order?
Answer : Option B
Explaination / Solution:
The Calvin cycle can be described under three stages: carboxylation, reduction and regeneration.Pathway operated in cyclic manner.
Q7. Electrons from exited chlorophyll molecules of photosystem II are accepted first by
Answer : Option C
Explaination / Solution:
During potophosphorylation, electron released during photolysis of water passes through electron transport chain. The electron from exited chlorophyll molecules of Photosystem II are accepted first by quinine.
Q8. On excitation, the electrons picked up by an electron acceptor is passed to
Answer : Option B
Explaination / Solution:
Electrons become excited and jump into an orbit farther from the atomic nucleus. These electrons are picked up by an electron acceptor which passes them to an electrons transport of cytochrome.
Q9. The first product of photosynthesis is sugar and it is converted
Answer : Option A
Explaination / Solution:
Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. The glucose is used in respiration, or converted into starch and stored.
Q10. Light reaction otherwise called as
Answer : Option D
Explaination / Solution:
Light reactions or the ‘Photochemical’ phase include light absorption, water splitting, oxygen release, and the formation of high-energy chemical intermediates, ATP and NADPH. Several complexes are involved in the process.
