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A pure phospholipid bilayer with its hydrophobic interior, is permeable to water and gases such as O2, CO2, N2 and small uncharged polar molecules such as urea, ethanol, but is impermeable to large uncharged polar molecules such as glucose, ions (Na+ , K+ , Cl-, Ca2+ ) and charged polar molecules instance for amino acids, ATP, glucose 6-phosphate. The initial group of molecules can cross a biological membrane unaided and without an input of energy, whereas the latter group requires the presence of integral membrane transport proteins and, in many cases an input of energy to travel by the otherwise impermeable membrane barrier. Thus the plasma membrane and the membranes of internal organelles are selectively permeable barriers and maintaining a distinct internal environment.
Cystic fibrosis (CF) is caused by a variety of mutations in the CFTR gene. Imagine you have identified a new single-base pair mutation (A→T) in an exon of the CFTR gene. You wish t
Q. For non-insulin users consumption of Alcohol? 1. Substitute for fat calories. A drink providing 100 calories should be substituted by 2 fat exchanges. . 2. Avoid if your
Valuation of biological resources includes the process of deriving a monetary value to the things that are not sold in the market. Examples are the value given to fuelwood gathere
Define the Maintenance of Weight Loss? Once an individual has managed to lose weight to a desirable level, it must not be assumed that the weight loss will be maintained automa
Explain the Scanning Electron Microscope It can be used to observe intact cells or cell components directly. Then sections are not necessary. It is used for visualizing surface
Q. What is Bigunnides? Bigunnides: They are atni diabetic drugs which do not affect the output of insulin. These are preferred to sulphony lureas because they do not cause we
Define effect of Antioxidants on athletes? Antioxidants like ascorbic acid (vitamin C), tocopherols (vitamin E), selenium, glutathione (GSH) Supplementation (singly or in combi
Determine the significance of Mesoglea. The jellylike layer found between endodermal and ectodermal cell layers of diploblastic organisms. It acts as a type of cement holding t
In the absence of any large scale envirorrmental change that is, in more or less uniform environments, populations often maintain a stable genetic constitution with respect to many
Onchology : This is the study of cancer. Oncology word meaning is mass, bulk & tumor. This is a branch of medicine which deals with tumors (cancer). The one who practices oncology
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