Answer:
Nucleus controls the DNA replication!
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The force which acts on an object without coming physically in contact with it is called non-contract force. The most familiar example of a non-contract force is weight. In contrast, a contact force is a force applied to a body by another body that is in contact with it.
will not be a practical source of energy on Earth
Answer:
83.4%
Explanation:
The imidazole ring is a weak acid, and so, in solution it must dissociate, losing protons (H⁺), and forming the anion, which will be the conjugate base. Calling the acid as HA, the charged histidine side chains will be the A⁻, and, by the Handerson-Halsebach equation:
pH = pKa + log[A⁻]/[HA], where [X] is the concentration of X. So:
7.2 = 6.5 + log[A⁻]/[HA]
log[A⁻]/[HA] = 7.2 - 6.5
log[A⁻]/[HA] = 0.7
[A⁻]/[HA] =
[A⁻]/[HA] = 5.012
So, the histidines sides that will be charged are 5 times higher then the ones that wouldn't be. If the initial concentrantion of the acid was 1 mol/L, and so, in equilibrium:
[A⁻] + [HA] = 1
[HA] = 1 - [A⁻], so:
[A⁻]/( 1 - [A⁻]) = 5.012
[A⁻] = 5.012 - 5.012[A⁻]
6.012[A⁻] = 5.012
[A⁻] = 0.834 mol/L
So, 83.4% of it will be charged (0.834/1 * 100%).
Explanation:
A process where two or more number of miscible liquids present in different fractions are separated by boiling at different temperatures is called fractional distillation.
The sudden decrease in temperature is because the compounds having lower boiling point have completed the distillation before vapor of the higher boiling point can actually fill the distillation head.
