282 Exam 3 Review

Front

What is the function of DNA polymerase III?

Back

DNA polymerase III is responsible for synthesizing the leading strand during DNA replication.

Front

What is the role of DNA polymerase I in DNA replication?

Back

DNA polymerase I resolves Okazaki fragments by removing RNA primers and replacing them with DNA.

Front

What protein recognizes the promoter in bacterial transcription?

Back

The sigma factor recognizes the promoter in bacterial transcription.

Front

What is a characteristic of ribozymes?

Back

Ribozymes are RNA molecules that can catalyze chemical reactions, but they are not considered evidence of ancient microbes.

Front

Which phylum is not classified as Gram-positive bacteria?

Back

Proteobacteria is not a phylum of Gram-positive bacteria.

Front

What are Okazaki fragments?

Back

Okazaki fragments are short sequences of DNA synthesized on the lagging strand during DNA replication.

Front

What is the significance of banded iron formations?

Back

Banded iron formations are geological evidence of ancient microbial activity and the presence of oxygen in Earth's early atmosphere.

Front

What is the primary role of RNA polymerase in transcription?

Back

RNA polymerase synthesizes RNA from a DNA template during the process of transcription.

Front

Define the term 'promoter' in genetics.

Back

A promoter is a DNA sequence that initiates transcription of a particular gene.

Front

What is the difference between leading and lagging strands in DNA replication?

Back

The leading strand is synthesized continuously, while the lagging strand is synthesized in short segments called Okazaki fragments.