In an Experiment, DNA Is Allowed to Replicate in an Environment

question 53

Multiple Choice

In an experiment, DNA is allowed to replicate in an environment with all necessary enzymes, dATP, dCTP, dGTP, and radioactively labeled dTTP (³H thymidine) for several minutes and then switched to nonradioactive medium. It is then viewed by electron microscopy and autoradiography. The drawing below represents the results.
Grains represent radioactive material within the replicating eye.
Figure 16.2
Which is the most likely interpretation?

• A)There are two replication forks going in opposite directions.
• B)Thymidine is only being added where the DNA strands are furthest apart.
• C)Thymidine is only added at the very beginning of replication.
• D)Replication proceeds in one direction only.

---

Definitions:

Learning

The acquisition of knowledge or skills through study, experience, or being taught.

Social Cognitive Theory

A framework for understanding, predicting, and changing human behavior, emphasizing the role of observational learning, self-efficacy, and the social environment.

Self-Efficacy

An individual's belief in their own ability to succeed in specific situations or accomplish a task.

Feedback

Information provided about an individual's performance or behavior, intended to guide future improvements.