Question

slide 5: from molecules to cells
big idea: small molecules slowly formed the first simple cell
include:

• picture showing molecules → cell
• words: protocells or early cells
• 1-2 sentences explaining how simple things became living cells

Explanation:

To address the requirement of explaining how simple molecules became living cells (protocells/early cells) in 1 - 2 sentences:

Step 1: Recall the process of chemical evolution and cell formation

Simple organic molecules (like amino acids, nucleotides) in the early Earth's environment underwent reactions to form more complex polymers (e.g., proteins, nucleic acids). These polymers then became enclosed in membranous structures (protocells), where internal chemical reactions and the ability to maintain an internal environment (homeostasis) and replicate genetic material emerged, transitioning them into the first living cells.

Step 2: Formulate the 1 - 2 sentence explanation

Simple organic molecules synthesized in the early Earth’s environment combined to form complex polymers; these polymers were then encapsulated in membrane - like structures (protocells), which developed metabolic and replicative capabilities, giving rise to the first living cells.

Answer:

Simple organic molecules synthesized in the early Earth’s environment combined to form complex polymers; these polymers were then encapsulated in membrane - like structures (protocells), which developed metabolic and replicative capabilities, giving rise to the first living cells.