Two Nuclei Collide,one Originally at Rest,in an Endothermic Nuclear Reaction

question 3

Multiple Choice

Two nuclei collide,one originally at rest,in an endothermic nuclear reaction with Q = −2.05 MeV.Which of the following describes the minimum kinetic energy needed in the reactant nuclei for the reaction is to occur?

• A)equal to 2.05 MeV
• B)greater than 2.05 MeV
• C)less than 2.05 MeV
• D)exactly half of 2.05 MeV

---

Definitions:

Okazaki Fragments

Short sequences of DNA nucleotides synthesized discontinuously and later linked together to form the lagging strand during DNA replication.

Heavy Nitrogen (15N)

A stable isotope of nitrogen, used in scientific studies to trace nitrogen pathways and cycles in the environment or organisms.

Meselson and Stahl

Scientists who conducted a landmark experiment in 1958 demonstrating that DNA replication is semiconservative, where each of the original strands serves as a template for a new strand.

Semiconservatively

A method of DNA replication where each of the two parental strands serve as templates for new strands, leading to two daughter molecules each having one old and one new strand of DNA.