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Science Biology
| Question | Answer |
|---|---|
| What is the first principle of cell theory? A) All living things are made of cells B) Cells are found only in animals C) Cells are produced by energy D) Cells cannot reproduce | A |
| What is the second principle of cell theory? A) Cells come from pre-existing cells B) Cells appear spontaneously C) Cells can only be made in labs D) Cells are made of protein | A |
| What is the third principle of cell theory? A) Cells are the basic unit of life B) Cells are non-living C) All cells have a nucleus D) Cells are made of atoms | A |
| What do prokaryotic cells lack? A) A nucleus B) DNA C) Cytoplasm D) Cell membrane | A |
| Where is DNA found in a prokaryotic cell? A) Nucleus B) Floating in cytoplasm C) Golgi apparatus D) Endoplasmic reticulum | B |
| Which cell type is larger and more complex? A) Prokaryotic B) Eukaryotic C) Bacterial D) Viral | B |
| What do plant cells have that animal cells don’t? A) Chloroplasts B) Mitochondria C) Ribosomes D) Lysosomes | A |
| What is the function of the cell wall in plants? A) Support and protection B) Photosynthesis C) Energy production D) DNA replication | A |
| What structure stores water in plant cells? A) Central vacuole B) Nucleus C) Cytoplasm D) Ribosome | A |
| What is the function of ribosomes? A) Protein synthesis B) Energy production C) Storage D) Digestion | A |
| What does the mitochondrion do? A) Produces ATP (energy) B) Stores nutrients C) Synthesizes proteins D) Controls the cell | A |
| What is the job of the Golgi apparatus? A) Packages and ships proteins B) Makes lipids C) Stores waste D) Creates ribosomes | A |
| What does the nucleolus produce? A) Ribosomes B) DNA C) ATP D) Lipids | A |
| What is the function of the cytoskeleton? A) Gives shape and support B) Creates energy C) Makes proteins D) Stores DNA | A |
| What organelle performs photosynthesis? A) Chloroplast B) Mitochondria C) Lysosome D) Ribosome | A |
| What is the cell membrane made of? A) Phospholipid bilayer B) DNA and protein C) Cell wall D) Glucose | A |
| Which part of the phospholipid is hydrophilic? A) Head B) Tail C) Both D) Neither | A |
| Which part of the phospholipid is hydrophobic? A) Tail B) Head C) Both D) Neither | A |
| What does the cell membrane do? A) Controls what enters and leaves B) Stores nutrients C) Creates energy D) Makes proteins | A |
| What is homeostasis? A) Maintaining a stable internal environment B) Cell growth C) Active transport D) Energy production | A |
| What is dynamic equilibrium? A) Constant change while maintaining balance B) No change C) Unstable state D) Rapid breakdown | A |
| What type of transport requires energy? A) Active transport B) Passive transport C) Diffusion D) Osmosis | A |
| What type of transport does NOT require energy? A) Passive transport B) Active transport C) Endocytosis D) Exocytosis | A |
| What is diffusion? A) Movement of molecules from high to low concentration B) Movement from low to high C) Active process D) Requires ATP | A |
| What is osmosis? A) Diffusion of water B) Diffusion of oxygen C) Movement of proteins D) Active transport | A |
| What happens in a hypertonic solution? A) Cell shrinks B) Cell swells C) No change D) Cell bursts | A |
| What happens in a hypotonic solution? A) Cell swells B) Cell shrinks C) No movement D) Cell hardens | A |
| What happens in an isotonic solution? A) Water moves equally in and out B) Cell shrinks C) Cell bursts D) Water only moves in | A |
| What is negative feedback? A) Reverses a change to maintain balance B) Strengthens a change C) Causes disease D) Stops cell growth | A |
| What is positive feedback? A) Increases the original change B) Stops the reaction C) Keeps balance D) Slows a process | A |
| Example of negative feedback: A) Blood sugar control B) Childbirth contractions C) Blood clotting D) Fever rise | A |
| Example of positive feedback: A) Childbirth contractions B) Blood sugar control C) Body temperature D) Water balance | A |
| What is a stem cell? A) An unspecialized cell that can become other types B) A dead cell C) A muscle cell D) A reproductive cell | A |
| What is a specialized cell? A) Performs a specific function B) Can turn into any cell C) Always divides D) Lacks a nucleus | A |
| What is cellular differentiation? A) Process of cells becoming specialized B) Cells dividing C) Cells shrinking D) Energy production | A |
| Order of biological organization (smallest to largest): A) Cell → Tissue → Organ → Organ system → Organism B) Organ → Cell → Tissue → Organ system C) Organism → Organ system → Cell D) Tissue → Cell → Organ | A |
| What are the two main purposes of cell division? A) Growth and repair B) Energy and storage C) Movement and digestion D) Photosynthesis | A |
| What happens during S phase? A) DNA is replicated B) Cell divides C) Proteins are made D) Cell rests | A |
| During which phase do chromosomes line up in the center? A) Metaphase B) Prophase C) Anaphase D) Telophase | A |
| During which phase are sister chromatids pulled apart? A) Anaphase B) Prophase C) Metaphase D) Telophase | A |
| What is cytokinesis? A) Division of cytoplasm B) DNA replication C) Growth phase D) Cell death | A |
| How does cytokinesis differ in plants and animals? A) Plant cells form a cell plate; animal cells pinch inward B) Both pinch inward C) Animal cells form a cell wall D) Both form a plate | A |
| What ensures cells divide correctly? A) Checkpoints B) Ribosomes C) Lysosomes D) Vacuoles | A |
| What is apoptosis? A) Programmed cell death B) Uncontrolled growth C) Cell differentiation D) Mutation | A |
| What is a tumor? A) Mass of uncontrolled cells B) Cluster of dead cells C) Healthy tissue D) New organ | A |
| What is a benign tumor? A) Non-spreading tumor B) Spreading tumor C) Virus infection D) Cancerous cell | A |
| What is a malignant tumor? A) Spreads to other tissues B) Harmless lump C) Non-dividing D) Heals on its own | A |
| What can cause cancer? A) DNA mutations B) Normal cell division C) Homeostasis D) Healthy diet | A |
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