Unit 5- All LTs

Front

What phase of the cell cycle is characterized by DNA replication?

Back

S phase

Front

What is the phase of the cell cycle during which the nucleus divides?

Back

Mitosis

Front

True or False: Humans have 46 chromosomes in all cells.

Back

False

Front

What are chromosomes made of?

Back

Chromosomes are made of DNA and proteins.

Front

What is the function of the centromere in a chromosome?

Back

The centromere is the region of a chromosome where the two sister chromatids are joined and where the spindle fibers attach during cell division.

Front

What are the main stages of the cell cycle?

Back

The main stages of the cell cycle are Interphase (G1, S, G2) and M phase (Mitosis and Cytokinesis).

Front

What occurs during the G1 phase of the cell cycle?

Back

During the G1 phase, the cell grows and synthesizes proteins necessary for DNA replication.

Front

What is the role of proteins in the structure of chromosomes?

Back

Proteins help package and organize DNA into a compact structure, allowing for proper segregation during cell division.

Front

What is the difference between mitosis and cytokinesis?

Back

Mitosis is the process of nuclear division, while cytokinesis is the division of the cytoplasm, resulting in two separate daughter cells.

Front

How many chromosomes do human somatic cells have?

Back

Human somatic cells have 46 chromosomes.