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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.
Define Interactions between Volatile Substances and Proteins? Flavour binding may involve adsorption at the surface of food or penetration to the food interiority by diffusion
What is the Speech Perception Test The subject is asked to listen to a series of 60 sounds, each of which consists of a double e digraph with varying prefixes and suffixes. The
Q. How chloroplasts multiply? Like mitochondria chloroplasts have their own the DNA, ribosomes and RNA and they self-replicate through binary division.
where we find annelid
Explain the Potential Benefits of micro nutrients? The potential benefits of micro nutrients should also be taken into account when the nutrient allowances are defined for olde
Define Viscosity and Consistency of Protein Systems? Viscosity and consistency of protein systems are the important functional properties in fluid foods, such as beverages, sou
what is its description and 3 most common example
B o v i ne ephemeral fever Ephemeral fever is commonly known as 'three-day sickness'. It affects mainly cattle and occasionally sheep in India. Causative agent is a mosquit
Q. How is female gametophyte formed in angiosperms? Into the flower ovary there are megasporangia enclosed by a tegument having a small opening, the micropyle. Inside the megas
Some observations seen in this fever are: 1. Massive loss of lean body mass or muscle due to tissue breakdown (250-500 g muscle tissue is lost/day) leading to excessive nitro
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