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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.
What is vernalisation? How is the process of vernalisation benefits to plants?
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Explain Precautions for capsule staining in a culture? 1. Never heat fix the smear. This is because by heating shrinkage can occur which may create a clear zone around the cell
Acid butt - carbohydrate utilization pattern test ? Acid butt (yellow) and acid slant (yellow) with or without gas production – Glucose along with lactose and/or sucrose, is deg
Whenever a pair of alleles has different alleles is there dominance between them? Not in all cases of a gene having two different alleles is the dominance complete. There are g
what is .groups of protozoa?
Acyanotic Congenital Heart Disease In this infant has no cyanosis because there is no abnormal communication between pulmonary and systemic circulation or there is no mixing
what is cation and anion? list of cation and anion and its biological function?
Q Does RNA molecule have two polynucleotide chains like the DNA? Only DNA has two polynucleotide chains. The RNA is formed by just one polynucleotide chain.
Which term is used to describe organisms that live on or in the bottom of an ocean or lake. Such organisms can be found anywhere from the shoreline to greatest ocean depths? a)
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