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Biology NEET - XI: Chapter 13- Photosynthesis Part 4

Biology26 CardsCreated about 2 months ago

A set of 26 flashcards covering important concepts from the text, including key figures and processes in photosynthesis.

Who recognized CO2 as the impure air?

Lavosier
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Key Terms

Term
Definition
Who recognized CO2 as the impure air?
Lavosier
Who gave the concept of two photosystems?
Arnold and Emerson
Who proved that the oxygen produced in photosynthesis is liberated from water?
van Neil
What is the sharp reduction in photosynthesis when monochromatic beam of wavelength greater than 680nm is used called?
Red drop
Who reported the red drop effect for the first time?
Emerson
What is the enchancement effect?
Increase in photosynthesis when two monochromatic beams of different wavelength are used together.

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TermDefinition
Who recognized CO2 as the impure air?
Lavosier
Who gave the concept of two photosystems?
Arnold and Emerson
Who proved that the oxygen produced in photosynthesis is liberated from water?
van Neil
What is the sharp reduction in photosynthesis when monochromatic beam of wavelength greater than 680nm is used called?
Red drop
Who reported the red drop effect for the first time?
Emerson
What is the enchancement effect?
Increase in photosynthesis when two monochromatic beams of different wavelength are used together.
What does the enhancement effect in plants prove?
Existence of two photosystems.
Who discovered that green parts of plants release oxygen?
Jan Ingenhousz
Who first discovered chlorophyll in plants?
Julius von Sachs
How do the chloroplasts arrange themselves in a mesophyll cell?
Along the walls
What is the colour of chlorophyll a?
Blue-green
What is the colour of chlorophyll b?
Yellow green
Why are no NADPH formed in cyclic photophosphorylation?
CYclic photophosphorylation occurs inside stroma lamella where NADP reductase enzymes are missing,
Where are protons transported as electrons move through the photosystems?
Across the membrane into the lumen
Where is the primary acceptor of electrons located according to chemiosmotic hyptothesis?
Towards the outer side of the membrane
What are the parts of ATP synthase enzyme?
CF0- embedded in the thylakoid membrane | Cf1- faces stroma
What kind of transport occurs in chemiosmotic synthesis?
Facililtated diffusion
How did Melvin Calvin discover that the first CO2 fixation product was a 3 carbon organic acid?
Using radioactive techniques
Which is the most crucial step of the calvin cycle?
Carboxylation
Bundle sheath cells have very thin walls. True/false?
False. They have very thick walls.
What does RuBisCO have greater affinity for- CO2 or O2?
CO2
Which plants shows greater tolerance to higher temperatures- C3 or C4?
C4
What kind of relationship do incident light and CO2 fixation rates have at low light intensities?
Linear relationship
At what percentage of full sunlight does light saturation occur?
10%
Which plants show saturation of photosynthesis at lower concentration of CO2?
C4 plants
Out of light reactions and dark reactions in photosynthesis which is affected more by higher temperatures?
Dark reaction