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State the major function of the cell membrane
A major function of the cell membrane is to maintain the characteristic integrity of the cell by forming a selective barrier between the cell and its surroundings. It regulates the movement of various molecules into and out of the cell. For this purpose, the cell membrane is endowed with various transport processes. In general, nonpolar molecules are transported more readily across the membrane than polar or charged molecules. While some substances can diffuse by passive diffusion across the membrane (e.g. water), substances like glucose are transported by facilitated diffusion, involving specific proteins in the membrane. Most biomolecules are, however, transported into and out of the cell in an active process involving expenditure of energy.
Figure shows part of a DNA molecule (a) (i) What do the dotted lines in Figure represent? (ii) Name J to M. J.............................. K..............................
Q. Explain Food borne toxic infections? Ans. The food borne toxic infections, you may recall reading earlier, are caused by the ingestion of a large numbers of ent
Q. What are some prophylactic measures against ascariasis? The major prophylactic measures against ascariasis are: efficient washing of vegetables and other foods base sanitary
Aspergillosis Aspergillosis is the most common chronic, granulomatous, necrotizing and cavitary disease of lungs, and is characterized by formation of white yellowish caseous
Insect resistant crops (IRC) Should reduce use of insecticides. This is beneficial to environment because: more beneficial insects around as they are not killed by ins
Traumatology : This is the study of wounds. In other words we can say that traumatology is the study of wounds or injuries which can be caused by accidents or violence to a person
Amino acid sequence is also known as the primary structure of a protein/polypeptide; the series of amino acids in a protein/polypeptide controlled by the series of DNA bases.
Define Prognosis of Eating Disorders? About 50% of the patients recover fully from anorexia nervosa and achieve normal weight, 30% improve but have a partial recovery and 20% w
Saturated fatty acids General formula of saturated fatty acids is CH3 (CHI), COOH. It has a polar end with a free XOOH group and a non-polar end with a hydrocarbon chain, as
F a t cow syndrome Fat cow syndrome, also known as fatty infiltration of liver, is a highly fatal disease in high yielding dairy animals that occurs a few days before or afte
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