Cell Biology Basics
Cells are the fundamental building blocks of all living organisms, making cell biology one of the most important topics in biology. Understanding how cells are organized, how they function, and how they interact provides the foundation for learning genetics, physiology, microbiology, and many other biological sciences. This flashcard deck introduces the essential concepts of cell biology through concise questions and answers that make studying faster and more effective. The deck covers the principles of cell theory, the differences between prokaryotic and eukaryotic cells, and the structure and function of major cell organelles, including the nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, chloroplasts, and vacuoles. It also explores the plasma membrane, the fluid mosaic model, diffusion, osmosis, passive transport, and active transport, helping you understand how substances move into and out of cells. Whether you are preparing for a biology exam, reviewing classroom material, or strengthening your understanding of life science, these flashcards provide an effective way to reinforce key concepts and improve long-term memory. Each question focuses on a single idea, making it easier to learn, practice, and recall important information.
All Cards in This Deck
Question
What is the cell theory?
Answer
Cell theory states that all living organisms are composed of one or more cells, the cell is the basic unit of life, and all cells arise from pre-existing cells.
Question
What are the two major types of cells?
Answer
Prokaryotic cells and eukaryotic cells.
Question
Which cells lack a nucleus and membrane-bound organelles?
Answer
Prokaryotic cells.
Question
What structure contains the genetic material in eukaryotic cells?
Answer
The nucleus.
Question
What is the primary function of the plasma membrane?
Answer
It selectively regulates the movement of substances into and out of the cell.
Question
What is the plasma membrane mainly composed of?
Answer
A phospholipid bilayer with embedded proteins.
Question
Which organelle is known as the powerhouse of the cell?
Answer
The mitochondrion.
Question
What is the function of ribosomes?
Answer
Ribosomes synthesize proteins.
Question
What is the role of the rough endoplasmic reticulum?
Answer
It synthesizes and modifies proteins destined for membranes or secretion.
Question
What is the function of the smooth endoplasmic reticulum?
Answer
It synthesizes lipids, detoxifies harmful substances, and stores calcium ions.
Question
Which organelle modifies, sorts, and packages proteins?
Answer
The Golgi apparatus.
Question
What is the primary function of lysosomes?
Answer
Lysosomes digest and recycle cellular materials using hydrolytic enzymes.
Question
Which organelle contains chlorophyll and performs photosynthesis?
Answer
The chloroplast.
Question
What is the function of vacuoles in plant cells?
Answer
They store water, nutrients, wastes, and help maintain turgor pressure.
Question
What is the cytoskeleton?
Answer
A network of protein fibers that provides cell shape, support, movement, and intracellular transport.
Question
What is passive transport?
Answer
Movement of substances across the membrane without energy, down their concentration gradient.
Question
What is diffusion?
Answer
The movement of molecules from an area of higher concentration to an area of lower concentration.
Question
What is osmosis?
Answer
The diffusion of water across a selectively permeable membrane.
Question
What is active transport?
Answer
Movement of substances against their concentration gradient using cellular energy (ATP).
Question
What is the fluid mosaic model?
Answer
A model describing the plasma membrane as a flexible phospholipid bilayer with proteins embedded and moving within it.