Draw a schematic diagram of a part of double stranded dinucleotide DNA chain having all the four nitrogenous bases and showing the correct polarity.
Double stranded dinucleotide DNA chain having all the four nitrogenous bases with polarity.
Where is sporopollenin present in plants? State its significance with reference to its chemical nature.
(a) State the difference between meiocyte and gamete with respect to chromosome number.
(b) Why is a whiptail lizard referred to as parthenogenetic?Some organisms suspend their metabolic activities to survive in unfavourable conditions. Explain with the help of any four examples.
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?
(a) State the role of DNA ligase in biotechnology.
(b) What happens when Meloidegyne incognitia consumes cells with RNAi gene?Explain the work carried out by Cohen and Boyer that contributed immensely in biotechnology.