What Is the Basis for the Difference in How the Leading

question 10

Multiple Choice

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?

• A) The origins of replication occur only at the 5′ end.
• B) Helicases and single-strand binding proteins work at the 5′ end.
• C) DNA polymerase can join new nucleotides only to the 3′ end of a pre-existing strand, and the strands are antiparallel.
• D) DNA ligase works only in the 3′ → 5′ direction.

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Definitions:

Measure of Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution.

Parameter

A numerical characteristic or measure that describes an aspect of a population.

Statistic

A single measure that is calculated from data to summarize or describe a characteristic of a sample.

Sample

A selection of individuals or items from a larger group or set that is used to gather and analyze data representative of the whole.