TLS Online TPP Program

#Question id: 3762


Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?

#Unit 3. Fundamental Processes
  1. DNA polymerase begins adding nucleotides at the 5' end of the template.

  2. The polarity of the DNA molecule prevents addition of nucleotides at the 3' end.

  3. Replication must progress toward the replication fork.

  4. DNA polymerase can add nucleotides only to the free 3' end.

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TLS Online TPP Program

#Question id: 463

#Unit 1. Molecules and their Interaction Relevant to Biology

Thioesters are similar to oxygen esters of carboxylic acids except that

TLS Online TPP Program

#Question id: 464

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the equilibrium constant for an oxidation-reduction reaction involving the transfer of 1 mole of electrons with DE0สน= 0.25 V. (R = 8.315 JK-1mol-1, F = 96.48 kJV-1mol-1, T = 298 K)

TLS Online TPP Program

#Question id: 465

#Unit 1. Molecules and their Interaction Relevant to Biology

If the standard reduction potential of a certain half-reaction is -0.30 V, which statement below is true for this half-reaction to proceed as a reduction?

TLS Online TPP Program

#Question id: 466

#Unit 1. Molecules and their Interaction Relevant to Biology

When a reduction half-reaction is ________ (negative, positive), electrons flow to the more readily reduced substance which is ________ (negative, positive) in value.

TLS Online TPP Program

#Question id: 467

#Unit 1. Molecules and their Interaction Relevant to Biology

The standard potential for electron transfer can be related to the standard free-energy change for redox reactions by using

TLS Online TPP Program

#Question id: 468

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycolysis is the name given to a metabolic pathway occurring in many different cell types.  It consists of 11 enzymatic steps that convert glucose to lactic acid.  Glycolysis is an example of