IB Bio HL Cell Division

What is the primary purpose of cell proliferation in multicellular organisms?

• Protein synthesis

• Energy production

• Cellular respiration

• Rapid increase in cell numbers

Tags

NGSS.HS-LS1-4

What is the role of cyclins in the cell cycle?

• To repair DNA

• To synthesize proteins

• To regulate the cell cycle

• To initiate apoptosis

What happens to cyclin levels after each checkpoint in the cell cycle?

• They double

• They decrease

• They increase

• They remain constant

Tags

NGSS.HS-LS1-4

What type of genes are responsible for suppressing tumors?

• Cyclins

• Oncogenes

• Tumor suppressor genes

• Proto-oncogenes

Tags

NGSS.HS-LS3-2

What is the mitotic index a measure of?

• Cell growth rate

• Proliferation status of a cell population

• DNA replication efficiency

• Protein synthesis rate

Tags

NGSS.HS-LS1-4

What is a benign tumor?

• A tumor that does not spread

• A tumor that is cancerous

• A tumor that grows rapidly

• A tumor that invades surrounding tissues

What is the consequence of mutations in proto-oncogenes?

• Decreased cell growth

• Normal cell function

• Uncontrolled cell division

• Increased cell death

Where does cell division for skin replacement primarily occur?

• Hypodermis

• Epidermis

• Dermis

• Subcutaneous layer

Tags

NGSS.HS-LS1-4

What is the term for the spread of cancer cells to other parts of the body?

• Apoptosis

• Proliferation

• Differentiation

• Metastasis

What is the role of p53 in the cell cycle?

• To promote cell division

• To repair DNA damage

• To synthesize proteins

• To inhibit the cell cycle

Tags

NGSS.HS-LS1-4