Exam 9: The Cell Cycle and Cellular Reproduction

Below the skin are "stem cells" that divide, with some cells continuing the stem cell line and others being pushed toward the surface to flatten and die and be sloughed off. In the bone marrow other stem cells produce erythrocytes that lose their nucleus and function for a few months in the bloodstream before they too die. Such "dead end" cells that reproduce no further

Organisms produced as a result of mitosis exhibit a great deal of genetic variation.

The purpose of therapeutic cloning is

Viruses and chemical exposure can cause mutations in proto-oncogenes which can lead to cancer.

Which does NOT occur in telophase?

Write an essay that explains how a geneticist could attempt to prevent cancer by manipulating a persons proto-oncogenes.

Angiogenesis

Which of the following is NOT true concerning mitosis?

can be unleashed by internal or external signals.

What phase of mitosis is pictured?

The event that signals the start of anaphase is

The enzymes that bring about apoptosis are: -called caspases.

Which sequence of stages in mitosis is correct?

Which is NOT correctly associated with cancer?

Which is NOT true about the chromosomes of a multicellular organism?

Which stage is most associated with a cell that is unable to divide again, such as a muscle or nerve cell?

During which stage of the cell cycle is cell growth and replication of organelles most significant?

The haploid (n) number of chromosomes for a human being is

Cloning can only be carried out using adult stem cells.

Eukaryotic chromosomes