Cholera: Symptoms, Causes,Transmission & Control

What is Cholera? Cholera Symptoms Cholera Symptoms: Cholera is an acute infection of alimentary canal, characterized by sudden and heavy onset of watery diarrhoea, severe vomiting and cramps in legs. Great thirst, suppression of urine and severe dehydration follow and as a result of which the patient may collapse. Cholera Causes organism: In 1884, Robert … Read more

What do you mean by Physiology?

What do you mean by Physiology? Ans: As per dictionary it means the branch of the biological sciences dealing with the functioning of organisms. The term ‘physiology’ originated from a Greek root Physiologikos’ means discourse on natural knowledge.It was introduced by the French physician Jean Fennel in 1552. William Harvey (1578-1657) is called as the … Read more

What is Biotechnology? Definition, Aims of Biotechnology

What is Biotechnology? Biotechnology is the application of the knowledge of biology in manufacturing processes. It involves the uses of living resources such as plants, animals and microorganisms which are suitably tailored to generate valuable products through technology, based on biological principles. It also involves development of new specimen through genetical engineering for use in … Read more

Tissue and Organ Transplantation

TISSUE AND ORGAN TRANSPLANTATION Replacement of diseased or injured organs or tissues by surgery is an important endeavour of modern medical science. Kidney and cornea transplantation and skin grafting are now widely practised. Attempt was made to transplant heart in 1967 which resulted in partial success. Since then attempt to transplant lungs and liver have … Read more

What is Solar Energy? Which are the Benefits of Solar Energy?

What is Solar Energy? In sun, the nuclear reaction converts hydrogen atom to helium atom and by doing so radiant energy is produced. This radiant energy passes through space as electromagnetic spectrum (wavelength of 380 nm -760 nm). The electromagnetic radiation is composed of small packets of energy called photons or quanta. These photons or … Read more

What is allergy?

ALLERGY Allergy is defined as altered reaction to the antigen antibody interaction in a person Who is hypersensitive to an offending substance. Allergy is therefore also called hypersensitivity. A person may be hypersensitive to a variety of substances such as chemicals, dust, pollen-grain, hay, fungal spore, fungal hyphae etc. A person who is sensitive to … Read more

Steps in the Formation of mRNA from DNA

STEPS IN THE FORMATION OF mRNA FROM DNA 1. On signal from cytoplasm RNA polymerase binds to the promoter region of DNA double helix. The promoter is located on the 5’ end of the gene to be transcribed. The promoter determines which strand to be transcribed. 2. In the region where DNA strand is to … Read more

How Pathogens are Transmitted? How Pathogens Cause Disease?

How Pathogens are Transmitted ? 1. Direct contact with infected person. It is the most important cause of disease transmission. If healthy persons come in contact with the materials discharged by diseased person, he may be infected by the pathogens present in the discharges. 2. Droplets spread pathogens. Coughing, sneezing, talking by infected persons spread … Read more

What is Biology? What are the Branches of Biology?

What is Biology? What are the Branches of Biology? One of the branches of science is biology. So that the biological and life-related research is done. It also includes discussion of their structure, growth, evolution, classification. Modern biology is a very broad field, which has many branches-subdivisions. In modern biology, cells are the main unit … Read more

What is Chemosynthesis? Definition and Examples

What is Chemosynthesis? Chemosynthesis is defined as a process in which the preparation of organic materials (usually carbohydrates) originating from H2O and Co2 using chemical energy. Organisms or living things that carry out this chemosynthesis process are those who do not have chlorophyll, for example sulfur bacteria such as bergiatoa as well as thiotrix and … Read more