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Find the initial osmotic pressure at room temperature of a cell if the only ions present are CaCl2 on either side of the membrane. Assume the concentrastions for K+ and Cl- from Table 7.2 and the ions cannot cross the membrane. The cell volume is 2nL. Determine the final cell volume.
Matthew Meselson and Frank Stahl grew bacteria in media having either N14 or N15 for various numbers of cell divisions. DNA from the bacterial samples were isolated and spun within
P HYSICA L PROPERTIES OF PROTOPLASM - 1 . Phase reversal - Due to difference in temperature outer part is gel and inner part of sol 2. Tyndall effect - Be
Simple diffusion Only comparatively small uncharged or hydrophobic molecules (H2O, O2, and CO2, other gases, urea and ethanol) cross the lipid bilayer through simple
The mirrows reach or grayling zone This zone has a less steep gradient, than the trout beck. The river here still flows swiftly, though the current is not fast and conditions
How is heart contraction triggered? Heart contraction is independent from neuronal stimulus (although it can be modulated by the autonomous nervous system). In the heart there
What are plasmids? Plasmids are circular DNA molecules there in the genetic material of some bacteria. They might be containing genes responsible for bacterial resistance to so
It is the most common (occurring in 75 per cent cases of ARF) manifestation of ARF. It involves large joints, it is typically fleeting in character shifting from one large joint t
Coagulation - Blood Collection : Plasma is used to minimize the time needed for coagulation so it is used is medical emergencies. There are many types of anticoagulants used
How Factors Affecting Energy Expended in Physical Activity? Physical activity as we learnt earlier is the second largest component of daily energy expenditure, after BMR. Howev
Decreasing power is available in a cell both as NADPH and NADH but these have quite distinct roles. NADH is oxidized by the respiratory chain to produce ATP by oxidative phosphoryl
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