Tag: health and diseases

Transgenic models are genetically modified organisms in which the genome has been altered through random integration of gene sequences.

Cryobiology is the branch of biology that deals with effects of low temperatures on living things. Teratology is the branch of science which deals with the study of congenital abnormalities and abnormal physiological development. Molecular biology is the branch of biology which deals with the the structure and function of the essential macromolecules. The major application of molecular biology to prevention and early detection of cancer and other diseases by identification of certain genes. Gerontology is the branch of science which deals with the study of old age, the process of ageing and the problems of aged people.

A deletion mutation occurs when part of a DNA molecule is not copied during DNA replication. This uncopied part can be as small as single nucleotide or as much as an entire chromosome. The loss of this DNA during replication can lead to genetic disease.

One of the hallmarks of human cancers is the intrinsic or acquired resistance to apoptosis. Evasion of apoptosis may contribute to carcinogenesis, tumor progression and also to treatment resistance, since most current anticancer therapies including chemotherapy, radio- and immunotherapy primarily act by activating cell death pathways including apoptosis in cancer cells.

Cholera is caused by the bacterium Vibrio cholerae. It can cause severe diarrhea, which comes on suddenly and may quickly cause dangerous fluid loss - as much as a quart (about 1 liter) an hour.
Therefore, the correct answer is option B.

Most people exposed to the cholera bacterium (Vibrio cholerae) do not become ill and never know they've been infected. Yet, because they shed cholera bacteria in their stool for seven to 14 days, they can still infect others through contaminated water. Most symptomatic cases of cholera cause mild or moderate diarrhea that's often hard to distinguish from diarrhea caused by other problems. Symptoms of cholera infection may include diarrhea, nausea and vomiting, dehydration. 

Sir Ronald Ross discovered the malarial parasite in the gastrointestinal tract of mosquito and led to the realization, that malaria was transmitted by mosquitoes. He received the Nobel Prize in 1902 for his work on malaria. 
Thus, the correct answer is option C.

Ronald Ross is known for his work on malaria. He worked and discovered malarial parasite in Secunderabad near Begumpet airport and that site is declared as 'Sir Ronald Ross Road'.
Thus, the correct answer is option C.