ICSE Class 10 Biology
Question 3 of 18
Structure of Chromosomes, Cell Cycle and Cell Division — Question 3
Back to all questions(a) Difference between Cytokinesis and Karyokinesis
| Cytokinesis | Karyokinesis |
|---|---|
| It is the division of the cytoplasm. | It is the division of the nucleus. |
| It occurs after karyokinesis. | It is the first division. |
| It results in the formation of two daughter cells. | It results in the formation of two nuclei. |
(b) Difference between DNA and RNA
| DNA | RNA |
|---|---|
| DNA is Deoxyribonucleic acid. | RNA is Ribonucleic acid. |
| It consists of four distinct bases: Thymine, Adenine, Cytosine and Guanine. | It consists of four distinct bases: Uracil, Adenine, Cytosine and Guanine. |
| The DNA is a double-stranded molecule. | The RNA is a single-stranded molecule. |
| It is located in the nucleus of a cell and in the mitochondria. | It is found in the cytoplasm, nucleus, and in the ribosome. |
(c) Difference between Nucleosome and Nucleotide
| Nucleosome | Nucleotide |
|---|---|
| Nucleosome is the complex that is made up of DNA wrapped around histone proteins. | The chemical composition of nucleotide consists of a phosphate group, a sugar and a nitrogenous base. |
(d) Difference between Centrosome and Centromere
| Centrosome | Centromere |
|---|---|
| It is an organelle of the animal cell surrounding the centrioles, located near the nucleus. | It is a non-stainable part of chromosome at which two chromatids join. |
| It contains one or two centrioles which move towards the opposite poles and forms spindle fibres during cell division. | It provides attachment of spindle fibres during cell division. |
(e) Difference between Haploid and Diploid
| Haploid | Diploid |
|---|---|
| Only half the number of chromosomes (only one member from each pair) is passed on to each daughter cell. | Full Set of chromosomes is passed on to each daughter cell. |
| It is denoted by n. | It is denoted by 2n. |
| This state is found during meiotic division. | This state is found during mitotic division. |