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2 years ago

Eukaryotes solve the problem of replicating the ends of their linear chromosomes by:

Biology

1 answer:

Nataliya [291]2 years ago

3 0

Answer:

B. Enzyme activity that uses an RNA template and reverse transcription in a series of repeat cycles

Explanation:

In eukaryotic linear chromosomes, the lagging strands at terminal do not get replicated in usual manner because it is a special case. The problem with terminal lagging strand (which is synthesized in a discontinuous manner) is that there is no template for its primer synthesis. In such scenario, an enzyme known as telomerase recognizes telomeres and extend it's 3' overhang through its reverse transcriptase activity which is facilitated by it's RNA component specifically. This RNA has repeat sequences which are complimentary to the telomeric repeats and therefore it acts as a template for the extension of 3' overhang.

Here, it may be noted that the leading strand does not require any terminal primer for replication because the replication process for it is continuous i.e. only one primer is required which is synthesized in the beginning of replication so there is no need of synthesizing primer again and again.

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just olya [345]

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3 years ago

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Ghella [55]

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3 years ago

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rjkz [21]

Answer:

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Explanation:

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3 years ago

Name the trophic levels in an ecosystem and explain how energy moves through the trophic levels. Use the food chain and food web

ella [17]

Answer:

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Explanation:

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1 year ago

Read 2 more answers

Suppose you discover a new form of a nucleic acid, XNA. Like DNA, it is double-stranded. You are interested in its mode of repli

victus00 [196]

Answer:

A: Unlike DNA, XNA replicates conservatively

Explanation:

The replication of the DNA is semi conservative. This means that newly replicated double helix DNAs usually consist of one parental strands and one newly synthesized strands. The parental DNA unwinds and each strand serves as template for the synthesis of complementary strands.

In the case of XNA, the two strands of parental XNA were found intact, meaning that the newly produced XNA consist of two newly synthesized strands. This thus means that the replication process is conservative.

Hence, unlike DNA replication that is semi conservative, XNA replication is conservative.

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2 years ago