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

What are macromolecules?

Suppose there were plants that had a high concentration of Chlorophyll b, but lacked chlorophyll a, would it carry out photosynthesis? Then why do plants have chlorophyll b and other accessory pigments?

Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?

Differentiate between Glycolysis and Krebs’ cycle.

Distinguish between the following: 

Glycolysis and Fermentation

State the role of pancreatic juice in digestion of proteins.

What are the functions of liver?

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

Draw the diagram of a sarcomere of skeletal muscle showing different regions.

Define sliding filament theory of muscle contraction.

Write true or false. If false, change the statement so that it is true:

Actin is present in thin filament

Write true or false. If false, change the statement so that it is true:

H-zone of striated muscle fibre represents both thick and thin filaments.

Write the differences between Actin and Myosin.

Write the difference between: 

Red and White muscles

How do you distinguish between a skeletal muscle and a cardiac muscle?

Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely ______ and ______.

In a muscle fibre Ca⁺⁺ is stored in ______.

Compare the following:

Resting potential and action potential

Explain the following process:

Transmission of a nerve impulse across a chemical synapse

Give a brief account of Mechanism of synaptic transmission.