Disclaimer Copyright. Schizophrenia is a group of severe mental disorders characterized by disturbances of language and communication; thought disturbances that may involve distortion of reality, misperceptions, delusions and hallucinations; mood changes and withdrawn, regressive, or bizarre behaviour, lasting longer than six months. (d) legumes are incapable of fixing nitrogen. World’s Largest Collection of Essays! During synthesis it has a molecular precursor, proinsulin. This transgenic rice has been crossed with the already adapted varieties of rice to make them grow well in a particular area. The cornea admits and helps to focus light waves as they enter the eye. The plasmid is found in, (b) Rhizobium of the roots of leguminous plants, 106. Cancer cells are more easily damaged by radiation than normal cells because they are. 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Then this pyruvic acid is converted to acetaldehyde and finally to ethyl alcohol in the absence of oxygen. It forms enzyme-antigen-antibody complex, if the antigen is present. The study of microbiology deals with the many different organisms that we are typically unable to see with the naked eye due to how small they are – i.e. 128. Linolenic acid is used in making soaps, emulsifiers and quick-drying oils, in beauty products. (c) quick growing crop ploughed under soil. The term exon was coined by American biochemist Walter Gilbert in 1978. Artificial insemination is a reasonably straight forward process to remove semen from a chosen male animal, and transfer it into a female at the appropriate stage of the oestrous cycle. (a): New world crops are those which have their center of origin as America. The heterocysts are the sites of N2-fixation. Each topic has hundreds of biology questions and answers multiple choice. Golden rice is a transgenic crop of the future with the following improved trait, (b) high lysine (essential amino acid) content. That itself shows how crucial is to prepare Biology to Score well in NEET. The workers are atrophid female which sacrifice themselves for the well-being of the colony. Beeswax is a natural secretion of the worker bees and is poured out in thin delicate scales or flakes. Mechanical Engineering: 3. A genetically modified organism (GMO) is an organism whose genetic material has been altered using genetic engineering technique. Non-living things. 329) in 100 g water (K f = 1.86 K kg mol –1) is [IIT JEE 2011] 1. When scientists make an animal superior by view of genotype, introducing some foreign genes in it, is called. (a): The nitrogen-fixing ability of leguminous plants is not a property of the plants as such but results from infection of their roots by bacteria in the soil, infection leading to the formation of nodules. 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The full grown caterpillar is 7.5 cm in length. Biology IX (Practical Centre MCQs Notes for Ninth Class) Multiple Choice Questions (MCQs) & Online Mcqsfor All Chapters - Class IX, 9th, Ninth. What is true for monoclonal antibodies? Erucic acid is used as a binder for oil paints. (b): Triticale is the first man made cereal or crop, which has been produced by intergeneric hybridization between common wheat (Triticum aestivum) and European rye (Secale cereale) with a view to combine characters of these two parent plants. Serum albumin is the most abundant plasma protein in humans and other mammals. 137 Questions with Answers and Explanations on “Applied Biology” for Students. 36. A giant rat is formed in the laboratory, what is the reason. After hatching, caterpillars need continuous supply of food because they are voracious feeders. Citric acid is made available in the market in the form of anhydrous crystalline chemical as powder. 32. That itself shows how crucial is to prepare Biology to Score well in NEET. This disease has come to be recognized in recent years as being caused by a DNA plasmid (Ti plasmid) carried by bacterium and transferred to the plant cells. Animals and plants. Biology Topics Wise MCQs. Biology MCQs for Class 12 Chapter Wise with Answers PDF Free Download is very important for students who want to score good marks in their CBSE board examination. Please select all that apply. Microorganisms do this by removing toxins from materials. Useful for freshers, students preparing for 1st & 2nd year exams, interview, GATE, IES, PSU, UPSC & diploma. Below is the list of Biology Topics and you can find MCQs for all Biology Topics which are necessary for test preparation. Young pollen grains produced androgenic haploids in anther cultures while anther wall, tapetal layer of anther wall and connective tissue are the parts of anther. When plasmids are used as cloning vectors and carry a novel DNA sequence they are referred to as chimeric plasmids. MCQ’s are based on 1. So only one strands gets labelled with thymidine it was again shifted to normal medium so only that one strand remained radioactive. (b) product of spore formation in bacteria. About one cubic foot of gas may be generated from one pound of cow manure at 75°F. Based on important multiple choice questions for all competitive exams and Biology Quiz. Answer:[A] Next Question → NCERT Class 12 Biology Solved Multiple Choice Questions. This entire process is called fermentation. Hybridomas comprising each selected clone can thus be propagated and grown in bulk to obtain, from each one, copious amounts of specific and homogeneous antibody. These transgenic plants which have resistance to insects are called bionsecticidal plants. 16. It develops salivary glands, stops feeding and moves towards corner among the leaves and secretes a sticky fluid through silk gland. Almost all topics of Biology are included in the list. 29. To get an increased yield of mil surrogate mothers are used in dairy. Answers are highlighted in bold. Most of these species produce seeds having 32-35% oil content. 20 MCQs on “Wildlife & Conservation” – Answered! Such cells can produce a clone that may be maintained in tissue culture and used for the continuing production of monoclonal antibody. Biology Tags. They are obligate anaerobes that can catabolize acetate and H- to gaseous products and are used in the final stage called hanogenesis of biogas production in gobar gas plant, ttrifying bacteria oxidise NH, into N02 and later to N03 Ammonifying bacteria convert proteins into NH3 nitrifying bacteria reduce N03 into NH3. 39. A Coombs test. India’s wheat yield revolution in the 1960s was possible primarily due to, (c) mutations resulting in plant height reduction. A uv light. (c): The new plant varieties are produced by selection and hybridization. Coir is the commercial product of coconuts. Hemicelluloses bind bundles of cellulose fibrils to form microfibrils, which enhance the stability of the cell wall but these can be degraded by increasing the number of enzymes. (b): Hybrid vigour or heterosis is defined as the superiority of the hybrid over its parents. It is the cis- isomer, the trans-isomer being brassidic acid. The restriction enzymes are used in genetic ‘engineering, because, (a) they can cut DNA at specific base sequence, (b) they are nucleases that cut DNA at variable sites. 81. (c): Anabaena is a nitrogen fixing cyanobacteria that forms symbiotic associations with Azolla. (a) A natural science (b) A physical science (c) A biological science (d) A social science 2. So apical meristems are virus free. 129. 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