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Q. What are the main causes of Mutation?
Some mutations take place randomly and spontaneously during process of mitosis or meiosis. Others are caused by mutagenic agents that are environmental or man-made factors that can increase frequency of mutation. Environmental factors like ultraviolet rays of the sun can cause changes in DNA which can result in skin cancer. Cosmic rays from space that penetrate earth's ozone layer are also a cause of mutation. Ionizing radiation like X-rays, gamma rays and nuclear radiation produce free radicals (atoms with unpaired electrons) in the cell which can cause breaks in DNA molecule. Carcinogens are chemical mutagens which cause gene mutations which can lead to cancer. A few instances of carcinogens are asbestos, benzene, some food dyes and PCBs.
Explain about the Cyanocobalamin (vitamin B 12 )? Vitamin B 12 (cobalamin, cbl) is a unique vitamin in human nutrition, since its malabsorption leads to the fatal syndrome of
definition ?
electron transport chain
Q. What are the respective functions of phospholipids, carbohydrates and proteins of the cell membrane? Membrane phospholipids have a structural function they form the bilipid
1. You are given a pair of primers that has been shown amplify a 125 bp DNA of interest specifically by a end point PCR- as there was only one PCR product with a size of 125 bp det
Micrographia is abnormally small, cramped handwriting and/or the progression to continually smaller handwriting. This is one of the symptoms of Parkinson''s disease.
Occurrence Pantothenic acid Pantothenic acid is a ubiquitous active principle occurring in free as well as in the bound form. In the bound form, pantothenic acid is incorpor
what is a cell?
Explain what is DNA? DNA : DNA is the source of the information that directs the development of the cell. Although all segments of DNA are not active in every cell in the huma
CHROMOLIPID Formed by lipid & pigment, eg. carotene, xanthophylls. Lycopene present in tomato & red chilli. Carrot is rich in b-carotene, converted into vitamin A.
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