Photosynthesis and Chloroplast Function

The video tutorial explains an experiment involving three test tubes to study the role of DCPIP as a hydrogen acceptor in photosynthesis. It highlights the importance of light-dependent reactions and the role of chloroplasts. The control tube is used to demonstrate that color change is due to chloroplasts, not the buffer solution. The tutorial also discusses the effects of distilled water on chloroplasts and factors affecting photosynthesis, emphasizing the need for light in the reduction of DCPIP.

What is the role of DCPIP in the experiment?

• It acts as a buffer solution.

• It is a hydrogen acceptor.

• It is a substitute for chlorophyll.

• It provides light for the reaction.

Which test tube contains chloroplast suspension?

• None of the test tubes

• Test tube two

• Test tube three

• Test tube one

Why is test tube one considered a control?

• It shows the effect of buffer solution.

• It is exposed to light.

• It is used to check the color change.

• It contains chloroplast suspension.

What happens to DCPIP in test tube two when exposed to light?

• It remains blue.

• It turns green.

• It turns red.

• It becomes colorless.

What is the main purpose of the light-dependent reactions in photosynthesis?

• To produce oxygen.

• To absorb carbon dioxide.

• To release water.

• To convert light energy to chemical energy.

Which factor does not affect the reducing ability of chloroplast suspension?

• Light intensity

• Temperature

• CO2 concentration

• Water availability

What is the result of photolysis of water in the experiment?

• Production of oxygen

• Release of hydrogen

• Absorption of carbon dioxide

• Formation of glucose

What happens to chloroplasts when suspended in distilled water?

• They swell and burst.

• They become turgid.

• They remain unchanged.

• They shrink.

What is the role of NADP in photosynthesis?

• It absorbs carbon dioxide.

• It releases oxygen.

• It is a hydrogen carrier.

• It acts as a light source.

What is the function of autotrophs in photosynthesis?

• To convert chemical energy to light energy

• To produce organic molecules from inorganic molecules

• To release carbon dioxide

• To produce inorganic molecules from organic molecules