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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 the activation center of an enzyme? Is it the key or the lock of the lock and key model? The activation center is a region of the enzyme formed by its spatial conformat
Which one of the following does not follow the central dogma of molecular biology? 1. Pea 2. Mucor 3. Chlamydomonas 4. HIV HIV is the central dogma of molecular bi
List the five major phases of the cell cycle, and briefly explain what happens during each phase. G1 phase: the cell grows. S phase: DNA is copied. G2 phase: the cell prepares
What is the difference among white and red blood cells? What are leukocytes? Red blood cells are erythrocytes and white blood cells are the leukocytes. Leukocytes are cells
who proposed the trinominal nomenclature
Results : In critical pulmonary stenosis in infancy, surgical mortality is 6 per cent. For children and adults with isolated pulmonary valve stenosis, the mortality approaches 0
Define the Future challenges of spatial processes? Understanding the dynamics of stochastic spatial systems, systems with a multitude of spatial scales, and systems along with
economic importance of viruses and bacteria ?
Explain different modes nutrition like Autotroph,hetrotroph,saprotroph,holozoic
If the generation time (t) is the incubation time (t) per generation (G), or t = t/G, rewrite the formula you derived in question 2 for bacterial population growth in terms of incu
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