Name the source of streptokinase. How does this bioreactor molecule function in our body?
Streptokinase enzyme is produced by the bacterium Streptococcus. It is modified by genetic engineering and is used as a clot buster for removing clots from the blood vessels of patients who have suffered from myocardial infarction.
How do mycorrhizae act as biofertilizers? Explain. Name a genus of fungi that forms a mycorrhizal association with plants.
Name of parasite the causes filariasis in humans. Mention its two diagnostic symptoms. How is this transmitted to others?
Draw a schematic diagram of a part of double stranded dinucleotide DNA chain having all the four nitrogenous bases and showing the correct polarity.
Explain the work carried out by Cohen and Boyer that contributed immensely in biotechnology.
(a) State the difference between meiocyte and gamete with respect to chromosome number.
(b) Why is a whiptail lizard referred to as parthenogenetic?Where is sporopollenin present in plants? State its significance with reference to its chemical nature.
(a) State the role of DNA ligase in biotechnology.
(b) What happens when Meloidegyne incognitia consumes cells with RNAi gene?Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.