Science (English Medium) Class 11 - CBSE Question Bank Solutions for Biology

Which light range is least effective in photosynthesis?

During light reaction in photosynthesis the following are formed ______.

Dark reaction in photosynthesis is called so because ______.

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?

Does moonlight support 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.

Is it correct to say that photosynthesis occurs only in leaves of a plant? Besides leaves, what are the other parts that may be capable of carrying out photosynthesis? Justify.

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:

1. What does the action spectrum indicate? How can we plot an action spectrum?
2. How can we derive an absorption spectrum for any substance?

Growth can be measured in various ways. Which of these can be used as parameters to measure growth ______.

Does the growth pattern in plants differ from that in animals? Do all the parts of plant grow indefinitely? If not, name the regions of plant, which can grow indefinitely.

Label the diagram

1. This is which part of a dicotyledonous plant?
2. If we remove part 1 from the plant, what will happen?

Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?

A gland not associated with the alimentary canal is ______.

Match the two columns and select the right one among options given