Which of the following statements is true? a....

Name: Problem 13, Chapter 9: Biology
Uploaded: 2021-01-05T19:13:45-08:00
Duration: 2 min 35 s
Channel: Bryan Lynn
Description: Which of the following statements is true? a. Proto-oncogenes cause a loss of control of the cell cycle. b. The products of oncogenes may inhibit the cell cycle. c. Tumor suppressor gene products inhibit the cell cycle. d. A mutation in a tumor suppressor gene may inhibit the cell cycle.

Which of the following statements is true? a. Proto-oncogenes cause a loss of control of the cell cycle. b. The products of oncogenes may inhibit the cell cycle. c. Tumor suppressor gene products inhibit the cell cycle. d. A mutation in a tumor suppressor gene may inhibit the cell cycle.

Which of the following statements is true?

a. Proto-oncogenes cause a loss of control of the cell cycle.
b. The products of oncogenes may inhibit the cell cycle.
c. Tumor suppressor gene products inhibit the cell cycle.
d. A mutation in a tumor suppressor gene may inhibit the cell cycle.

Key Concepts

Oncogenes

Oncogenes are mutated or dysregulated forms of proto-oncogenes that promote uncontrolled cell proliferation. By initiating or accelerating the cell cycle, the products of oncogenes can contribute to the development and progression of cancers by disrupting normal growth controls.

Cell Cycle Regulation

Cell cycle regulation refers to the processes and mechanisms that govern the progression of cells through the phases of growth, DNA replication, and division. This regulation is essential for development, tissue repair, and maintaining genomic integrity, and involves a complex interplay of proteins, enzymes, and checkpoints that ensure cells only replicate when it is appropriate and safe to do so.

Proto-oncogenes

Proto-oncogenes are normal genes that encode proteins which help regulate cell growth and division. They play critical roles in encouraging cell proliferation and survival, but when they mutate, they can become oncogenes that contribute to unregulated cell division and cancer development.

Tumor Suppressor Genes

Tumor suppressor genes code for proteins that act to inhibit cell division, repair DNA mistakes, or initiate apoptosis in the case of irreparable damage. They serve as the cell's braking mechanism to counterbalance the effects of proto-oncogenes and oncogenes. Mutations in these genes often result in the loss of this inhibitory function, allowing cells to grow uncontrollably and potentially form tumors.

Transcript

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