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LuckyWell [14K]
2 years ago
15

In dna replication, why do the two strands of the helix have to be elongated by two slightly different mechanisms?.

Biology
1 answer:
MAVERICK [17]2 years ago
3 0

Answer:

because the strands must be built from 5' to 3'.

Explanation:

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It is pertinent to understand what hypertonic, hypotonic, and isotonic solution means before setting out to explain how a cell reaches equilibrium in each type of solution.

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A hypotonic solution is one with the same solute concentration as that of the sap of the cell immersed in it.

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In biological systems, water molecules move by osmosis from the region of higher water potential or lower concentration of solutes to the region of lower water potential or higher concentration of solute. An equilibrium is reached when there is no net movement of water between two sides. Hence;

A cell placed in a hypertonic solution will lose water to the surrounding solution until an equilibrium is reached. This means that such a cell will end up shrinking (wilting) or even dying due to loss of water from the cell sap.

A cell placed in a hypotonic solution will gain water from the surrounding solution until there is no net movement of water anymore. Such a cell might become turgid or even burst out its cell content.

A cell placed in an isotonic solution will neither gain nor lose water because the cell sap and the surrounding solution have equal solute concentrations.

Explanation:

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