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

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 ______.

Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any industry which manufactures the compounds by isolation. Find out who are the buyers.

Give the schematic representation of glycolysis?

The five kingdom classification was proposed by ______.

Whittaker is famous for :-

The term ‘systematics’ refers to ______.

What does ICZN stand for?

A plant may have different names in different regions of the country or world. How do botanists solve this problem?

The number and kinds of organism is not constant. How do you explain this statement?

A scientist has come across a plant which he feels is a new species. How will he go about its identification, classification and nomenclature?

Brassica campestris Linn

1. Give the common name of the plant.
2. What do the first two parts of the name denote?
3. Why are they written in italics?
4. What is the meaning of Linn written at the end of the name?

How is the five–kingdom classification advantageous over the two-kingdom classification?

In the five kingdom system of Whittaker, how many kingdoms are eukaryotes?

Cyanobacteria and heterotrophic bacteria have been clubbed together in Eubacteria of kingdom Monera as per the “Five Kingdom Classification” even though the two are vastly different from each other. Is this grouping of the two types of taxa in the same kingdom justified? If so, why?

In Opuntia the stem is modified into a flattened green structure to perform the function of leaves (i.e., photosynthesis). Cite two other examples of modifications of plant parts for the purpose of photosynthesis.