Biology Semester 1 Review

Front

What are transmembrane proteins?

Back

Proteins that span the width of cell membranes and help the cell interact with its external environment.

Front

What is the phenotype ratio of offspring from a cross between two heterozygous purple flower plants (Pp x Pp)?

Back

25% white flowers and 75% purple flowers.

Front

What occurs during anaphase of cell division?

Back

The spindle fibers separate the chromosomes.

Front

What is a common characteristic of both bacteriophages and E. coli?

Back

They lack membrane-bound organelles.

Front

What happens just before a cell enters the G2 stage of the cell cycle?

Back

DNA replicates.

Front

Define dominant trait in genetics.

Back

A trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is the function of checkpoints in the cell cycle?

Back

To ensure that the cell meets certain criteria before moving to the next stage.

Front

What is the role of spindle fibers during cell division?

Back

To separate chromosomes and pull them to opposite poles of the cell.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical daughter cells, while meiosis results in four genetically diverse gametes.

Front

What is a bacteriophage?

Back

A type of virus that infects bacteria.