b.<\/strong> Can you suggest methods to treat this ADA deficiency? \n <\/p>\nQuestion 14. \nAn article in the newspaper reports that ‘Refrigerants like Chlorofluorocarbons (CFCs) pose threat to the environment’. How CFCs are harmful to the environment? \n <\/p>\n
Question 15. \nGenetically Modified Organism (GMO) is always a debatable topic among scientists, academicians and public. State any four usefulness of GMOs. \n <\/p>\n
Question 16. \nInterspecific interaction from the interaction of populations of two different species. If we assign + for beneficial, – for detrimental and 0 for neutral interactions, copy and complete the following chart. \n <\/p>\n
Question 17. \nA newspaper report read like this. \u201cConventional agricultural products like cereals, pulses and other seeds may not be able to meet the demand of food according to the increase in population. So focus has to be shifted to alternate food sources like SCPs. \na.<\/strong> What are SCPs? \u201d \nb.<\/strong> Give one example of SCPs. \nc.<\/strong> What are the advantages of SCPs? \n \n <\/p>\nQuestion 18. \nRestriction endonucleases are the enzymes used to cut the DNA molecules. \na.<\/strong> Give the general term of the specific sequences where these enzymes cut the DNA. \nb.<\/strong> Name the enzyme that joints the foreign DNA and vector DNA. \nc.<\/strong> Give any two procedures to introduce the recombinant DNA into the host cell. \n <\/p>\nAnswers<\/strong><\/p>\nAnswer 1. \nd.<\/strong> Pistillate<\/p>\nAnswer 2. \nParthenogenesis.<\/p>\n
Answer 3. \na.<\/strong> Gene therapy. \nb.<\/strong> ADA deficiency can be treated using bone marrow transplantation or by enzyme therapy. In gene therapy, lymphocytes from the blood of the patient are grown in a culture outside the body. A functional ADA cDNA is then introduced into lymphocytes and return back to patient.<\/p>\nAnswer 4. \na.<\/strong> RNA interference (RNAi) is the phenomenon of inhibiting activity of a gene through production of sense RNA and anti-sense RNA \nb.<\/strong> The nematode specific genes introduced into the host plant using vectors. The introduction of DNA, it produce both sense and anti sense RNA in the host cells. These two DNA’s it form double stranded RNA that initiated RNA which silenced the specific mRNA of the nematode. Thus parasite could not survive in the host.<\/p>\nAnswer 5.<\/p>\n
\nTropical regions have relatively more constant and predictable climate.<\/li>\n Tropical regions remained undisturbed for millions of years which results in greater diversification.<\/li>\n Availability of more solar energy con-tribute much productivity at tropical regions.<\/li>\n<\/ol>\nAnswer 6. \nA\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0B<\/strong> \nZoospores\u00a0 \u00a0 \u00a0Chlamydomonas \nConidia\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Penicillium \nBud\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Penicillium \nGemmules\u00a0 \u00a0 \u00a0Sponges<\/p>\nAnswer 7. \na.<\/strong> Phytoplanktons \nb.<\/strong><\/p>\n\nPhytoplanktons<\/li>\n Submerged stage<\/li>\n Floating stage<\/li>\n Reed swamp stage<\/li>\n Sedge meadow stage<\/li>\n Woodland stage<\/li>\n Climax forest stage.<\/li>\n<\/ol>\nAnswer 8. \na.<\/strong> RNA interference. \nb.<\/strong> RNA interference (RNA) is the phenomenon of inhibiting activity of a gene through production of sense RNA and anti-sense RNA.<\/p>\nAnswer 9. \na.<\/strong> 10 \nb.<\/strong> 30<\/p>\nAnswer 10. \na.<\/strong> Lichen, ie., crustose lichen is the pioneer species. \nb.<\/strong> Crustose lichen stage \u2192 Foliose lichen stage \u2192 moss stage \u2192 herb stage \u2192 shrub stage \u2192 forest stage. \nForest stage is a stable climax community.<\/p>\nAnswer 11. \na.<\/strong> Hydarch succession. \nb.<\/strong><\/p>\n\nPhytoplanktons<\/li>\n Submerged stage<\/li>\n Floating stage<\/li>\n Reed swamp,stage<\/li>\n Sedge meadow stage<\/li>\n Woodland stage<\/li>\n Climax forest stage.<\/li>\n<\/ol>\nAnswer 12. \nMicroinjection:<\/strong> Recombinant DNA is directly injected into the nucleus of animals cell. , \nBiolistics:<\/strong> Cells are bombarded with high velocity microparticles of gold or tungsten coated with DNA.<\/p>\nAnswer 13. \na.<\/strong> Adenosine deaminase (ADA) enzyme is crucial for the immune system function. Absense or decrease of this enzyme cause disorder. It is due to the deletion of the gene for adenosine deaminase enzyme.’ This is called ADA deficiency, \nb.<\/strong> Gene therapy, Bine marrow transplantation<\/p>\nAnswer 14. \nCFC released from refrigerant to the atmosphere, is split in to chlorofluro components and combined with ozone in the ozone layer and induce its decomposition. So ozone readily become O2<\/sub> molecule. This decreases the concentration of ozone in ozone layer which cause holes in the ozone layer. Through the holes, UV rays and other harmful rays can be easily fall up on earth which cause other diseases like cancer.<\/p>\nAnswer 15.<\/p>\n
\nThe GM props have enhanced nutritional quality and yield.<\/li>\n Transgenic crops grow well in saline soil and show salt tolerance.<\/li>\n They increase productivity of crops generally by showing resistance against plant pathogens and to some herbicides.<\/li>\n Transgenic pig organs like heart, kidney, pancreas can be transplanted into humans.<\/li>\n<\/ol>\nAnswer 16. \nSpecies Species Name of interaction<\/strong> \n <\/p>\nAnswer 17. \na.<\/strong> Single Cell Proteins. \nb.<\/strong> Spirullina. \nc.<\/strong><\/p>\n\nIt can be grown easily on materials like waste water, straw, sewage etc.<\/li>\n It can be serve on food rich in protein, minerals,fats, carbohydrate and vitamins.<\/li>\n It reduce environmental pollution.<\/li>\n<\/ol>\nAnswer 18. \na.<\/strong> Palindrome sequences \nb.<\/strong> DNA Ligases \nc.<\/strong> Micro-injection :<\/strong> Recombinant DNA is directly injected into the nucleus of animal cells. \nBiolistics or gene gun:<\/strong> Cells are bom barded with high velocity micro par tides of gold or tungsten coated with DNA<\/p>\nWe hope the Plus Two Botany Model Question Papers Paper 4 help you. If you have any query regarding Plus Two Botany Model Question Papers Paper 4, drop a comment below and we will get back to you at the earliest.<\/p>\n","protected":false},"excerpt":{"rendered":"
Plus Two Botany Model Question Papers Paper 4 is part of Plus Two Botany Previous Year Question Papers and Answers.\u00a0Here we have given Plus Two Botany Model Question Papers Paper 4 Plus Two Botany Model Question Papers Paper 4 Board SCERT Class Plus Two Subject Botany Category Plus Two Previous Year\u00a0Question Papers Time: 1 Hours […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[42728],"tags":[],"yoast_head":"\n
Plus Two Botany Model Question Papers Paper 4 - A Plus Topper<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n