Biology Final Exam Review Part 2

DNA can only replicate itself when chromosomes are in the form of

• chromatids
• sister chromatids
• centromeres
• chromatin

What does it mean to describe a tumor as malignant?

• it enters the blood stream
• it forms secondary tumors
• it is cancerous
• all of the above

What type of molecules regulate the cell cycle?

• carbohydrates
• proteins
• lipids
• nucleic acids

The number of chromosomes in a gamete is represented by the symbol

• Z.
• X.
• N.
• Y.

If an organism’s diploid number is 12, its haploid number is

• 12
• 6
• 24
• 3

Gametes are produced by the process of

• mitosis.
• meiosis.
• crossing-over.
• replication.

Chromosomes form tetrads during

• prophase I of meiosis.
• metaphase I of meiosis.
• interphase.
• anaphase II of meiosis.

What happens between meiosis I and meiosis II that reduces the number of chromosomes?

• Crossing-over occurs.
• Metaphase occurs.
• Replication occurs twice.
• Replication does not occur.

Unlike mitosis, meiosis results in the formation of

• diploid cells.
• haploid cells.
• 2N daughter cells.
• body cells.

What is formed at the end of meiosis?

• two genetically identical cells.
• four genetically different cells.
• four genetically identical cells.
• two genetically different cells.