27. How are chromatin, chromatid and chromosomes related to each other?
28. What are the consequences of the following conditions?
(a) A cell containing higher water concentration than the surrounding medium
(b) A cell having low water concentration than the surrounding medium.
(c) A cell having equal water concentration to its surrounding medium.
Answers
Answer:
Explanation:
(a) A cell having higher water content than the surrounding medium, meaning that the surrounding solution is very concentrated solution (hypertonic solution), the cell will lose water by exosmosis. Such a solution is known as hypertonic solution.
(b) A cell having low water concentration than the surrounding medium, meaning that the surrounding solution is very dilute (hypotonic solution), the cell will gain water by endosmosis. Such a solution is known as hypotonic solution.
(c) A cell having equal water concentration to its surrounding medium, the cell will neither gain nor lose water to the external medium. Such a solution is known as isotonic solution.
Answer:
Chromatin is a lower organisation or order of DNA while the chromosomes are the condensed form of the chromatin and a higher order or organization of the the DNA and are therefore a lower organisation or order of DNA. Chromatid are the one-half of a replicated chromosome.
A= When a cell possess higher water concentration than the surrounding medium then exosmosis occurs In the cell due to the difference in water concentration in the cell and surrounding medium and cells shrinks.
B=A cell having low water concentration than the surrounding medium means the cell possesses high solute concentration. ... Such, solution is said to be hypotonic. In such case, the water molecules move from outside to the inside of the cell through the cell membrane. This process is called as endosmosis.
C= A cell having equal concentration to its surrounding medium will not show any changes as isotomic conditions persist in the solvent.
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