Science (English Medium) कक्षा ११ - CBSE Question Bank Solutions

Briefly give the contributions of the following scientists in formulating the cell theory

1. Robert Virchow
2. Schielden and Schwann

Write the function of the following:

Cell wall

When we homogenise any tissue in an acid the acid soluble pool represents ______.

The most abundant component of living organisms is ______.

Which metal ion is a constituent of chlorophyll?

Which pigment acts directly to convert light energy to chemical energy?

Which range of wavelength (in nm) is called photosynthetically active radiation (PAR)?

Chlorophyll ‘a’ is the primary pigment for light reaction. What are accessory pigments? What is their role in photosynthesis?

In a way green plants and cyanobacteria have synthesized all the food on the earth. Comment.

What can we conclude from the statement that the action and absorption spectrum of photosynthesis overlap? At which wavelength do they show peaks?

Phosphorylation of glucose during glycolysis is catalysed by ______.

Energy is released during the oxidation of compounds in respiration. How is this energy stored and released as and when it is needed?

F₁ particles participate in the synthesis of ______.

Which of the following will release more energy on oxidation? Arrange them in ascending order.

1. 1 gm of fat
2. 1 gm of protein
3. 1 gm of glucose
4. 0.5 g of protein + 0.5g glucose

Pyruvic acid is the end product of glycolysis. What are the three metabolic products of pyruvic acid produced under aerobic and anaerobic conditions? Write their name in the space provided in the diagram.

The energy yield in terms of ATP is higher in aerobic respiration than anaerobic respiration. Why anaerobic respiration occurs even in organisms that live in aerobic condition like human beings and angiosperms?

Comment on the statement – Respiration is an energy producing process but ATP is being used in some steps of the process.

The figure given below shows the steps in glycolysis. Fill in the missing steps A, B, C, D and also indicate whether ATP is being used up or released at step E?

We commonly call ATP as the energy currency of the cell. Can you think of some other energy carriers present in a cell? Name any two.

ATP produced during glycolysis is a result of substrate level phosphorylation. Explain.