THE BIOLOGY PAGE


NCERT (BELOW)

 Class 10 

1).Cell Cycle, Cell Division and Structure of Chromosomes

 2).Genetics 

3).Absorption By Roots

4).Transpiration

5).Photosynthesis

6).Chemical Coordination in Plants

7).Circulatory System

8).Excretory System

9).Nervous System

10).Sense Organs

11).Endocrine System

12).Reproductive System

13).Human Population

14).Human Evolution

15).Pollution

 

NCERT Class 9

5). Fundamental Unit Of Life 

6).Tissue

7).Diversity In Living Organisms  


PHYSICS

CHEMISTRY

MATHS

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Cell Cycle, Cell Division and Structure of Chromosomes

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  Exercise 1 Solution A.1. (b) DNA and Histones Solution A.2. (c) Coloured bodies Solution B.1. (a) – Nucleotides. (b) – Nucleosome. (c) – Hydrogen Bond. (d) – Phosphate, Sugar and Nitrogenous base. Solution C.1. Chromatin fibre is unfolded, uncondensed, extended DNA. It is only visible when cell under goes division whereas chromosomes are condensed DNA and they are visible when the cell is divided. Solution C.2. Rungs of DNA ladder is made of nitrogenous bases which includes Adenine (A), Guanine (G), Cytosine (C) and Thymine (T). Solution C.3. (a) The four nitrogenous bases in the DNA ladder are Guanine, Thymine, Adenine and Cytosine. (b) Genes are specific sequences of nucleotides on a chromosome. (c) A nucleotide is composed of a phosphate, sugar (pentose) and a nitrogenous base. (d) Nucleosomes are groups of histone molecules surrounded by DNA strands. (e) If there are ...
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The Excretory System

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