Cell Theory
What is the basic unit of structure of all living organisms?
What is a Cell?
Which organelle controls what enters and leaves the cell?
Cell membrane
Which structure is found in plant cells and helps provide support and shape?
Cell wall
What process moves particles from an area of high concentration to low concentration?
Diffusion
Put these in order from smallest to largest: organ, cell, organism, tissue, organ system.
Cell → tissue → organ → organ system → organism
According to Cell Theory, where do new cells come from?
What is pre-existing cells?
Which organelle contains the cell’s instructions and helps control cell activities?
Nucleus
Which organelle allows plant cells to capture light energy?
Chloroplast
What is the movement of water across a membrane called?
Osmosis
Why does a plant cell need both a cell wall and a cell membrane?
The cell wall provides support and protection, while the cell membrane controls what enters and leaves.
What are the three main parts of Cell Theory?
What is all living things are made of cells; cells are the basic unit of structure and function; all cells come from pre-existing cells.
Which organelle releases usable energy from nutrients?
Mitochondria
A cell has a nucleus, mitochondria, and a cell membrane but no cell wall or chloroplasts. What type of cell is it?
Animal Cell
What is the goal of diffusion?
To reach equilibrium or equal concentration (balanced)
A cell can take in nutrients, but its mitochondria stop working. What problem would the cell have?
t would have trouble releasing usable energy from nutrients.
A scientist discovers something that grows and reproduces but is not made of cells. Which part of Cell Theory would this challenge?
What is all living things are made of cells.
Which organelle breaks down waste and unwanted materials?
Lysosome
What two structures are strong evidence that a cell is a plant cell?
Cell wall and chloroplasts
What process occurs when a cell surrounds and takes material into the cell?
Endocytosis
How do the cell membrane and lysosomes work together to help the cell survive?
The membrane controls materials entering and leaving, while lysosomes break down waste and unwanted materials.
How does a single-celled organism support the idea that the cell is the basic unit of life?
What is one cell can carry out all the processes needed for life?
Which two structures work together to process and transport materials such as proteins?
Endoplasmic reticulum and Golgi apparatus
A cell has a cell wall but no nucleus. What type of cell is it most likely?
Bacteria Cell
How can exocytosis help a cell maintain homeostasis?
It helps remove waste or unwanted materials from the cell.
Choose three organelles and explain how they work together to help a cell function as a system.
Example: The cell membrane lets nutrients in, mitochondria release energy from those nutrients, and the nucleus directs cell activities.