DNA History, Structure, and Replication

Front

What is DNA Helicase?

Back

An enzyme responsible for unwinding and unzipping the DNA during replication and transcription.

Front

What did Erwin Chargaff conclude from his experiments?

Back

A and T, C and G always occur in equal amounts.

Front

What are the PURINE nitrogen bases?

Back

Adenine and Guanine.

Front

What does the semi-conservative model of DNA replication state?

Back

The original strand serves as a template for the construction of the new strand.

Front

What is nitrogen base pairing?

Back

The specific pairing of nitrogenous bases in DNA: Adenine with Thymine, and Cytosine with Guanine.

Front

What is the role of DNA Polymerase?

Back

An enzyme that synthesizes new DNA strands by adding nucleotides to a growing chain.

Front

What is the function of DNA Ligase?

Back

An enzyme that joins Okazaki fragments on the lagging strand during DNA replication.

Front

What are the main components of DNA?

Back

DNA is composed of nucleotides, which include a phosphate group, a sugar (deoxyribose), and a nitrogenous base.

Front

What is the structure of DNA?

Back

DNA has a double helix structure, consisting of two strands twisted around each other.

Front

What are the four nitrogen bases in DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).