Unit 2 Review

Front

What is a checkpoint in the cell cycle?

Back

A checkpoint is a critical point where stop and go signals can regulate the cycle.

Front

What is the corresponding DNA strand for 5'ATGCTCAGCTGA3'?

Back

3'TACGAGTCGACT5'.

Front

How is cancer defined?

Back

Cancer is defined as the uncontrolled division of mutated cells.

Front

What molecules form the sides (backbone) of the DNA ladder?

Back

Deoxyribose (sugar) and phosphate.

Front

What is the lagging strand in DNA replication?

Back

The lagging strand is the strand that is copied from 3' to 5'.

Front

What is the role of growth factors in cell division?

Back

Growth factors are proteins that stimulate cell division and growth.

Front

What is an oncogene?

Back

An oncogene is a mutated gene that has the potential to cause cancer.

Front

What is the function of DNA polymerase?

Back

DNA polymerase is an enzyme that synthesizes new DNA strands by adding nucleotides.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains deoxyribose, while RNA is single-stranded and contains ribose.

Front

What is the significance of the 5' and 3' ends of a DNA strand?

Back

The 5' end has a phosphate group, and the 3' end has a hydroxyl group, determining the direction of replication.