Photosynthesis & Plant MCQs with Answers

Pyrenoids are made up of ?

• A.Core of protein surrounded by sheath of starch
• B.Core of starch surrounded by sheath of protein
• C.Core of lipids surrounded by sheath of cellulose
• D.Core of cellulose surrounded by sheath of lipids

If one wants to study chloroplasts, which type of cell would be best to study chloroplasts?

• A.Photosynthetic cell
• B.Nerve cell
• C.Red blood cell
• D.Muscle cell

Phosphorus is utilized by plants in the form of _?

• A.Phosphates
• B.Orthophosphates
• C.Phosphoric acid
• D.Phosphorus pentoxide

Cyclic phosphorylation is stimulated by ?

• A.Low level of NADPH
• B.High level of ATP
• C.High level of NADPH
• D.High level of oxygen

Photosynthesis is the only process which produces free O2 by splitting _?

• A.Carbon dioxide (CO2)
• B.Water (H2O)
• C.Glucose (C6H12O6)
• D.Chlorophyll

The phenomenon which does not lead to global warming is _?

• A.Deforestation
• B.Burning of fossil fuels
• C.Photosynthesis
• D.Volcanic eruptions

Etioplasts found in plants are actually one of the type of _?

• A.Amyloplasts
• B.Leucoplasts
• C.Chromoplasts
• D.Chloroplasts

Phototropic curvature is the result of uneven distribution of ?

• A.Auxin
• B.Gibberellin
• C.Cytokinin
• D.Abscisic acid

In all plants, the major sites of photosynthesis are----.

• A.Leaves
• B.Stems
• C.Roots
• D.Flowers

_ is an unusual plant hormone and is the only plant hormone to exist as hydrocarbon gas.

• A.Auxin
• B.Gibberellin
• C.Ethylene
• D.Cytokinin