Why Does E

question 73

Multiple Choice

Why does E. coli need both DNA polymerse III and DNA polymerase I?

• A) DNA polymerase III lacks the 5ʹ → 3ʹ exonuclease activity needed to remove RNA primers.
• B) Each polymerase is specific for only one strand of DNA. DNA polymerase III acts only on the leading strand, and DNA polymerase I acts only on the lagging strand.
• C) DNA polymerase I is needed to join the Okazaki fragments.
• D) The DNA replication is bidirectional; one polymerase is used for each direction.
• E) Only DNA polymerase I has proofreading ability.

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Definitions:

Interest Rate

The percentage of a sum of money charged for its use, determining the cost of borrowing or the return on savings.

Money Supply

The total amount of money available in an economy at a specific time, including cash and deposits.

Opportunity Cost

Sacrificing the chance to gain from other alternatives by committing to one choice.

Real Interest Rate

The interest rate adjusted for inflation, representing the true cost of borrowing and the real yield to lenders or investors.