Biology Basic Unit 3 Test

It is the by product of photosynthesis:

• CO₂

• O₂

• H₂O

• C₆H₁₂O₆

Light can work in chloroplast if it is:

• Transmitted

• Absorbed

• Reflected

• Refracted

Main photosynthetic pigments of the plants is:

• Chlorophyll a

• Chlorophyll c

• Chlorophyll b

• Xanthophylls

Pyrrole rings of chlorophylls is:

• 4 cornered saturated

• 4 cornered unsaturated

• 5 cornered saturated

• 5 cornered unsaturated

Difference between chlorophyll a and b is due to difference in their:

• Head portion

• Both head and tail

• Tail portion

• Neither head nor tail

All of the following functions are attributed to carotenoids except:

• Broaden absorption spectrum

• Protection to chlorophylls

• Dissipation of energy

• Conversion of energy to ATP

It is also called as energy conservation phase of photosynthesis:

• Light reactions

• Krebs cycle

• Calvin cycle

• Glycolysis

Reaction center of a photosystem does not include:

• Chlorophyll a

• Primary electron acceptor

• Chlorophyll b

• None of these

Main difference between photosystem I and II lies at:

• Chlorophyll a of antenna complex

• Wavelength of light they absorbed

• ETC of antenna complex

• ETC of reaction center

Photoexcited electrons pass from PS II to PS I via:

• Chlorophyll a molecules

• NADPH molecules

• Chlorophyll b molecules

• Electron transport chain