DNA: THE GENETIC MATERIAL The biologists of twentieth century realized that the genetic material must have certain characteristics. These charabteristics can explain the properties of life: 1: First, the genetic…
The transfer of genetic material between bacteria through cell-to-cell contact is called bacterial conjugation. It is a mechanism of horizontal gene transfer. Bacterial conjugation is often incorrectly regarded as sexual…
Multiple Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. Which of the followings is linker protein? (a) H1 …
Write note on eukaryotic chromosomes. Write note on sex chromosomes and autosomes. Discuss linkage relationships. Write note crossing over. Write note on point mutation Discuss aneuploidy and polyploidy. Discuss changes…
TERMS DEFINITIONS Cell cycle The highly dispersed state of chromosomes is called chromatin. Mitosis The highly folded form during division of cell is called Nucleosothe Four types of Histone protein…
PROTOZOAN TAXONOMY Zoologists who specialize in the study of protozoa are called proto-zoologists. The protests base diversity of ultrastructure, life cycle, mitochondria, DNA sequence data, life styles and evolutionary lineages.…
Physical and chemical disturbance and errors occur during meiosis. They damage chromosome or alter their number in a cell. There can be folloyn chromosomal alterations: Point mutation The change of…
The response of plant to the relative length of light and dark period is called photoperiodism. I here are number of plants responses controlled FA photoperiods. Some of these are:…
The highly specialized shoot which is responsible for the production of fruits and seeds is called flower. Flowers are concerned with the sexual reproduction. Flower has following pans. 1.Sepals: Sepals…
Multiple Choice Questions (MCQs) Phragmoplast is formed from: (a) Ribosome (b) ER (c) Golgi body (d) None Chromosomes start condensing in: (a) Leptotene (b) Zygotene (c) Pachytene (d) Diplotene The…
abida
rubab
saadia
sana
sidra