Cell Communication and Cell Cycle

What is the primary function of cell communication in multicellular organisms?

• To coordinate cellular activities

• To replicate DNA

• To produce energy

• To transport nutrients

Tags

NGSS.HS-LS1-3

Which of the following is a type of cell signaling that involves direct contact between cells?

• Endocrine signaling

• Paracrine signaling

• Autocrine signaling

• Juxtacrine signaling

In the cell cycle, during which phase does DNA replication occur?

• G1 phase

• S phase

• G2 phase

• M phase

What is the role of cyclins in the cell cycle?

• To degrade proteins

• To regulate the cell cycle

• To repair DNA

• To transport molecules

Tags

NGSS.HS-LS1-4

Which molecule acts as a second messenger in many signal transduction pathways?

• ATP

• cAMP

• DNA

• RNA

What is the function of the mitotic spindle during mitosis?

• To replicate DNA

• To separate chromosomes

• To synthesize proteins

• To break down the nuclear envelope

Tags

NGSS.HS-LS1-4

Which phase of the cell cycle is characterized by the separation of sister chromatids?

• Prophase

• Metaphase

• Anaphase

• Telophase

Tags

NGSS.HS-LS1-4

What is apoptosis?

• Uncontrolled cell division

• Programmed cell death

• Cell differentiation

• Cell growth

Which protein is known as the 'guardian of the genome'?

• Cyclin

• p53

• Ras

• Myc

What is the role of growth factors in cell communication?

• To inhibit cell division

• To stimulate cell division

• To repair DNA

• To degrade proteins

Tags

NGSS.HS-LS1-4