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CSIR life Science practice papers |
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Re: CSIR life science practice papers
As you Asking for the Question Paper of the CSIR NET Life Science the Question Paper is given below Which of the following bonds will be most difficult to break? 1. CO 2. CC 3. CN 4. CS The conformation of a nucleotide in DNA is affected by rotation about how many bonds? 1. 4 2. 6 3. 7 4. 3 Which of the following proteins acts as an energy transducer? 1. G-protein. 2. Bacteriorhodopsin. 3. Hemoglobin. 4. Heat shock protein. Which of the following predicted property of lipid bilayers would result if the phospholipids had only one hydrocarbon chain instead of two? 1. The bilayers formed would be much less fluid. 2. The diameter of the head group would be much larger than the acyl chain and would tend to form micelles rather than bilayers. 3. the bilayers formed would be much more fluid. 4. the bilayers would be more permeable to small water-soluble molecules Which of the following statements is not true for transposable element system? 1. It consists of both autonomous and non-autonomous elements. 2. Dissociation elements are autonomous in nature. 3. Transposase is transcribed by the central region of autonomous elements. 4. Certain repeats in the genome remain fixed even after the element transposes out When two mutants having the same phenotype were crossed, the progeny obtained showed a wild-type phenotype. Thus the mutations are 1. non-allelic. 2. allelic. 3. segregating from each other. 4. independently assorting. Two varieties of maize averaging 48 and 72 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 60 inches in height. Of the 500 F2 plants, the shortest 2 are 48 inches and the tallest 2 are 72 inches. What is the probable number of polygenes involved in this trait? 1. Four. 2. Eight. 3. Sixteen. 4. Thirty two The mode of action of the anticancer drug methotrexate is through its strong competitive inhibition on 1. dihydrofolate reductase. 2. thymidine synthase. 3. thymidine kinase. 4. adenylate cyclase When prospective neuroectoderm from an early amphibian gastrula is transplanted in the prospective epidermal region of a recipient (early gastrula) embryo, the donor tissue will give rise to 1. neural tube. 2. epidermis. 3. neural tube and notochord. 4. neural tube and epidermis. . Amphibian oocytes remain for years in the diplotene stage of meiotic prophase. Resumption of meiosis is initiated by 1. gonodatropic hormone. 2. growth hormone. 3. oestrogen. 4. progesterone. Due to the presence of cellulose in the cell wall of plants, leaf shape is determined in the leaf primorida by 1. rates of cell division. 2. planes of cell division. 3. cell migration. 4. cell-cell interactions. In higher plant leaves, the reduction of nitrate to ammonium takes place by the combined action of nitrate reductase localized in cytosol and nitrite reductase localized in 1. peroxisomes. 2. mitochondria. 3. chloroplasts. 4. cytosol. . Vesicular-arbuscular mycorrhiza (VAM) represents a beneficial association between plant roots and fungus, where fungus assists plants in obtaining from the soil 1. iron. 2. zinc. 3. sulphate. 4. phosphate Rest of the Questions you may get from the below Attachement that is Free to Download Question Paper of the CSIR NET Life Science |
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