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

\[\ce{2H2O -> 4H^{+} + O2 + 4e^{-}}\]

Based on the above equation, answer the following questions:

1. Where does this reaction take place in plants?
2. What is the significance of this reaction?

NADP reductase enzyme is located on ______.

Breakdown of proton gradient leads to release of ______.

Where is NADP reductase enzyme located in the chloroplast? What is the role of this enzyme in proton gradient development?

ATPase enzyme consists of two parts. What are those parts? How are hey arranged in the thylakoid membrane? Conformational change occur n which part of the enzyme?

How are photosynthesis and respiration related to each other?

Explain how during light reaction of photosynthesis, ATP synthesis is a chemiosmotic phenomenon.

Find out how Melvin Calvin worked out the complete biosynthetic pathway for synthesis of sugar.

Tomatoes, carrots and chillies are red in colour due to the presence of one pigment. Name the pigment. Is it a photosynthetic pigment?

The entire process of photosynthesis consists of a number of reactions. Where in the cell do these take place?

Fixation of CO₂ ______

The ultimate electron acceptor of respiration in an aerobic organisms is ______.

Match the following and choose the correct option from those given below.

The end product of oxidative phosphorylation is ______.

Oxygen is an essential requirement for aerobic respiration but it enters the respiratory process at the end? Discuss.

Respiration is an energy releasing and enzymatically controlled catabolic process which involves a step-wise oxidative breakdown of organic substances inside living cells.

In this statement about respiration explain the meaning of 1) Step-wise oxidative breakdown, and 2) Organic substances (used as substrates).

Given below is a diagram showing ATP synthesis during aerobic respiration, replace the symbols A, B, C, D and E by appropriate terms given in the box.

F1, Particle, Pi, 2H⁺, Inner mitochondrial membrane, ATP, Fo particle, ADP

Oxygen is critical for aerobic respiration. Explain its role with respect to ETS.

Fill in the places with appropriate word/words.

Apical dominance as expressed in dicotyledonous plants is due to the presence of more ______ in the apical bud than in the lateral ones.

A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?

Where are the following hormones synthesized in plants?

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