Typhoid Causative Agent – Bacteria – Salmonella typhi Symptoms – Sustained High fever Head ache Stomach ache constipation. Intestinal Ulcers. Intestinal Perforations leading to Read More …
Category: Biology
When do we need to administer immunosuppressant drugs?
Our Immune system has an inherent capability to recognise ‘Self” from ‘Non- Self”. When Organ Transplants are done, this property of our immune system Read More …
What are the levels of Biodiversity?
There are three levels of Biodiversity- Genetic level – Refers to different genes example – 50,00 genetically different strains of rice in India. Species Read More …
A double stranded DNA has a total of 1500 nucleotides, out of which 550 are cytosine containing nucleotides. How many purine bases does this DNA have?
The nitrogenous bases in a DNA are Purines – Adenine, Guanine and Pyrimidines – Cytosine ,Thymine. A purine pairs with Pyrimidine. A=T C = Read More …
A polypeptide consists of 15 different Amino Acids. How many tRNAs are needed for the synthesis of this polypeptide?
Since each Amino acid is coded for by a codon. Each codon has a tRNA with a corresponding anti- codon. The number of tRNAs Read More …
Brief note on Milk production by Transgenic Cow, ‘Rosie’?
The Transgenic Cow Rosie, produced human protein enriched milk.( 2.4 gm per liter of milk). The milk contained human alpha – lactalbumin . The Read More …
What are the advantages of Genetically modified plants?
Genetic Modification has made improvements in plants in various ways. Crops more tolerant to abiotic stresses. Reduced reliance on chemical pesticides. Helped reduce post Read More …
What is Allergy?
The exaggerated response of immune system to certain antigens present in the environment is called allergy.
Reproduction in Phycomycetes
Mucor, Rhizopus. Asexual reproduction in phycomycetes is by Zoospores ( Motile) or aplanospores (Non- motile), endogenously produced in sporangium. Sexual reproduction by fusion of Read More …
Reproduction in Fungi
Reproduction in Fungi takes place by – Vegetative means by fragmentation, fission, budding. Asexual means by spores called conidia or sporangiospores or zoospores. Sexual Read More …