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

Name the phase of the cell cycle at which the following event occurs:

Centromere splits and chromatids separate.

Name the phase of the cell cycle at which the following event occurs:

Pairing between homologous chromosomes takes place.

Pyruvate undergoes oxidative decarboxylation to produce _____________.

(a) 2-PGA

(b) α-Ketoglutarate

(c) Succinyl-Co-A

(d) Acetyl-Co-A

Describe modifications of stem with suitable examples

What are the cellular components of blood?

What is the following and where do you find them in animal body?

Chondrocytes

Distinguish between Dense regular and dense irregular connective tissues

Distinguish between Adipose and blood tissue

New cells generate from ______.

Which of the following is correct?

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?

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