Bacterial transduction and its types
Transduction is the transfer of gene or portion of DNA from one bacterium (donor) to another (recipient) mediated by a bacteriophage. In transduction, the bacteriophage […]
Month: August 2018
Growth of bacteria and the bacterial growth curve
In higher organisms, growth means increase in size and volume of the organism whereas in case of bacteria, growth refers to the increase in their […]
Mutation and its types
Mutation can be defined as any inheritable changes in the sequence of nitrogenous bases of DNA that brings about sudden change in the morphological characteristics […]
Differences between Gram positive and Gram negative bacteria
S.N Gram positive bacteria Gram negative bacteria 1. They retain the color of crystal violet and stain dark blue or purple. They take the color […]
Plasmids, their types and functions
Plasmids are extra-chromosomal DNA. They are circular and double stranded DNA molecules which encode traits that are not essential for bacterial viability (normal growth and […]
Sexual cycle or Sporogony in the life cycle of Plasmodium
This cycle occurs inside the mosquito’s body which begins with the ingestion of gametocytes by the female Anopheles during the blood meal. The gametocytes released […]
Asexual cycle or Schizogony in the life cycle of Plasmodium
The life cycle of Plasmodium is digenetic, i.e completed in two hosts. The primary host is man where the asexual cycle is completed called schizogony. […]
Plasmodium: Characteristic features and classification
Plasmodium is an intracellular blood parasite which causes a malarial fever. Charles Laveran discovered this parasite in the RBCs of man. Ronald Ross discovered the […]
Electrocardiogram, the recording of electrical activities of the heart
A permanent recording of the electrical events during a cardiac cycle made on a graph paper in the form of waves is called electrocardiogram (ECG). […]
Phagocytosis, an example of endocytosis
The ingestion and digestion of exogenous antigens, such as whole microorganisms and insoluble particles and endogenous matter, such as injured or dead host cells, cellular […]