Advertisements
Advertisements
Question
Dark reaction in photosynthesis is called so because ______.
Options
It can occur in dark also
It does not depend on light energy
It cannot occur during day light
It occurs more rapidly at night
Advertisements
Solution
Dark reaction in photosynthesis is called so because it does not depend on light energy.
Explanation:
Splitting of the water molecule and formation of ATP is directly driven by light and hence are called light reactions. The rest of the steps are not directly light-driven and hence are called dark reactions (as per convention). This does not mean that they happen in the dark and not during the day.
APPEARS IN
RELATED QUESTIONS
Consider an experiment, where thylakoids are removed and kept in a culture medium. The medium is supplemented with all the requisites of photosynthesis, i.e. \[\ce{CO2}\], \[\ce{H2O}\]. The setup is exposed to light. Hexose sugar is not formed as the end product.
Choose the option that justifies the above result.
Which of the following is the site of photolysis of water?
Grana refer to ______.
Which light range is least effective in photosynthesis?
During light reaction in photosynthesis the following are formed ______.
The correct sequence of flow of electrons in the light reaction is ______.
Cyanobacteria and some other photosynthetic bacteria don’t have chloroplasts. How do they conduct photosynthesis?
Which products formed during the light reaction of photosynthesis are used to drive the dark reaction?
Do reactions of photosynthesis called, as ‘Dark Reaction’ need light? Explain.
The entire process of photosynthesis consists of a number of reactions. Where in the cell do these take place?
Synthesis of ATP and NADPH ______
The entire process of photosynthesis consists of a number of reactions. Where in the cell do these take place?
Synthesis of sugar molecule ______
The entire process of photosynthesis consists of a number of reactions. Where in the cell do these take place?
Synthesis of starch ______
Which property of the pigment is responsible for its ability to initiate the process of photosynthesis? Why is the rate of photosynthesis higher in the red and blue regions of the spectrum of light?
In the figure given below, the black line (upper) indicates action spectrum for photosynthesis and the lighter line (lower) indicates the absorption spectrum of chlorophyll a. Answer the following:
- What does the action spectrum indicate? How can we plot an action spectrum?
- How can we derive an absorption spectrum for any substance?
