THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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only has one replication bubble that moves in one direction
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has many replication bubbles that move in both directions
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more complex than eukaryotic replication
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is non-circular
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Detailed explanation-1: -All prokaryotes have circular DNA which replicates from a single origin, resulting in a single replication bubble. The replication bubble grows in two directions from its origin. There are two replication forks in a replication bubble, which is where the parental DNA double helix is split.
Detailed explanation-2: -The prokaryotes lack a true nucleus and have a circular DNA. The circular DNA replicates from a single origin, therefore only a single replication bubble is formed. Conversely, eukaryotic DNA is linear and replicates from several origins resulting in a number of replication bubbles.
Detailed explanation-3: -One strand is synthesized continuously in the direction of the replication fork; this is called the leading strand. The other strand is synthesized in a direction away from the replication fork, in short stretches of DNA known as Okazaki fragments.
Detailed explanation-4: -Eukaryotic DNA can have multiple replication bubbles to speed up the process of DNA replication. Each replication bubble would have two replication forks moving in opposite directions.