Question

can you explain what cells are made of?

Explanation:

Cells are mainly composed of various biomolecules and structures. The main components include: 1. Cell Membrane: A phospholipid bilayer with embedded proteins, controlling substance entry/exit. 2. Cytoplasm: A gel - like substance (cytosol) with organelles. 3. Organelles:

• Nucleus: Contains DNA (genetic material), controlling cell activities.
• Mitochondria: Produce ATP (energy) via cellular respiration.
• Ribosomes: Synthesize proteins.
• Endoplasmic Reticulum (ER): Rough ER (with ribosomes) makes proteins; smooth ER synthesizes lipids, detoxifies.
• Golgi Apparatus: Modifies, sorts, and packages proteins/lipids.
• Lysosomes: Contain enzymes to digest waste, foreign particles.
• Cytoskeleton: Provides structure, aids in cell movement/division (composed of microfilaments, microtubules, intermediate filaments).

1. Biomolecules:

• Proteins: Perform various functions (enzymes, structural, signaling).
• Nucleic Acids (DNA, RNA): Store and transmit genetic information, involved in protein synthesis.
• Lipids: Form cell membranes, store energy (e.g., phospholipids, cholesterol, triglycerides).
• Carbohydrates: Serve as energy sources (e.g., glucose) or structural components (e.g., cellulose in plant cell walls).

Prokaryotic cells (e.g., bacteria) lack a nucleus and most membrane - bound organelles but still have a cell membrane, cytoplasm, ribosomes, and genetic material (circular DNA in the nucleoid region). Eukaryotic cells (plant, animal, fungal, protist cells) have a nucleus and membrane - bound organelles, with plant cells also having a cell wall (composed of cellulose), chloroplasts (for photosynthesis, containing chlorophyll) and a large central vacuole (stores water, nutrients, and waste).

Answer:

Cells are composed of a cell membrane, cytoplasm (with cytosol and organelles), and various biomolecules (proteins, nucleic acids, lipids, carbohydrates). Organelles in eukaryotic cells include the nucleus, mitochondria, ribosomes, ER, Golgi apparatus, lysosomes, and cytoskeleton. Prokaryotic cells have simpler structures with a nucleoid (for DNA), ribosomes, and a cell membrane (plus a cell wall in many cases). Plant cells also have a cell wall, chloroplasts, and a large central vacuole.