In E.coli, Ahur Kornberg found which enzyme?
**Core Concept**
The question refers to the discovery of a crucial enzyme in E.coli by Arthur Kornberg, which is related to **DNA replication**. This process is fundamental to molecular biology and involves the synthesis of new DNA strands. The enzyme in question plays a key role in this process.
**Why the Correct Answer is Right**
Arthur Kornberg discovered **DNA polymerase**, an enzyme essential for DNA replication. DNA polymerase reads template DNA strands and matches the incoming nucleotides to the base pairing rules, then links them together to form a new strand. This enzyme is critical for the replication process, as it ensures the accurate duplication of genetic material.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice is incorrect because it does not correspond to the enzyme discovered by Arthur Kornberg.
**Option B:** Similarly, this option is not related to Kornberg's discovery.
**Option C:** This choice is also incorrect as it does not match the enzyme found by Kornberg.
**Clinical Pearl / High-Yield Fact**
Remember that DNA polymerase is a key enzyme in DNA replication, and its discovery by Arthur Kornberg was a significant milestone in molecular biology. This knowledge is crucial for understanding genetic processes and has implications for various medical fields.
**Correct Answer:** D. DNA polymerase