Cell Structure Reteach

Cell Structures

Cell Theory

1. All cells come from preexisting cells (meaning you first need a cell before you can have another one--cells divide and make more)

2. All organisms are composed of cells (if it was alive or ever was alive, it contains(ed) cells

3. Cells are the basic unit of life (all organisms contain one or more cells)

Multiple Choice

Part of the Cell Theory states that cells come from other cells. Which statement below explains this part of the theory as it applies to all organisms?

• The cells of all organisms excrete waste.

• The cells of all organisms have cytoplasm.

• The cells of all organisms divide to make more cells.

Cell Types

There are two main types of cells that we discuss in this unit:

● Unicellular-organisms with only one cell (bacteria, protists,

algae, and archaea)

● Multicellular-organisms with more than one cell (plant and

animal)

Plant Cells:

they must make their own food through photosynthesis

●Cell Wall-outermost layer of the cell, specific to only plants, protects the cells

●Cell Membrane-another layer of protection for the cell, allows things in and out of the cell

●Nucleus-control center of the cell

●Cytoplasm-gel-like substance that holds the cell together

●Mitochondria-breaks down glucose into energy

●Vacuoles-stores water, energy, and waste (very large and central)

●Chloroplast-uses sunlight and
chlorophyll to create glucose

​Organelles

Multiple Choice

Why are chloroplasts found in plant cells but not in animal cells?

• Plant cells need rigid support

• Plant cells need to store food and water

• Plant cells need to make their own food

Multiple Choice

Sponges live their lives attached to the sea floor or onto rocks that are under water. They have no organs, so they feed by allowing nutrient-rich water to flow through them. Based on the diagram of a sponge cell, what best explains if sponges are considered animals or plants?

• Sponge cells do not have cell walls, so they must be animals.

• Sponge cells do not have mitochondria, so they must be plants.

• Sponge cells do not have a nucleus, so they must be plants.

• Sponge cells do not have vacuoles, so they must be animals.

Multiple Choice

Mark looks at an unknown cell under a microscope. What structure could he observe to help him identify whether the cell came from a plant?

• Mitochondria

• Vacuole

• Nucleus

• Cell Wall

Open Ended

Dr. Lopez studies the cells of oak trees that grow on steep hills. He is learning how the trees can support themselves and get enough food. The trees have very different needs than animals. Describe two structures found in plant cells but not in animal cells. How do these structures help plant cells to meet a plant’s needs?

Animal Cells:

cannot make their own food, must get food from other organisms

●

Cell Membrane-another
layer of protection for the
cell, allows things in and out
of the cell

●

Nucleus-control center of the cell

●

Cytoplasm-gel-like
substance that holds the cell together

●

Mitochondria-breaks down
glucose into energy

●

Vacuoles-stores water, energy, and waste (smaller than plant cell vacuoles)

​Organelles

Multiple Choice

Which of the following statements best compares vacuoles in plant and animal cells?

• Only plant cells have vacuoles (large and centrally located in the cell)

• Only animal cells have vacuoles (many small vacuoles located throughout the cell)

• Plant and animal cells both have vacuoles, but plant cells have large, central vacuoles while animal cells have many smaller vacuoles.

Dropdown

​

Select answer

cells make their own food. ​

Select answer

cells do not make their own food.

Multiple Choice

If a plant has waste it needs to store, it will store it in __________.

• Vacuole

• Nucleus

• Cell Membrane

• Mitochondria

Multiple Choice

What is the function of the nucleus?

• breaks down glucose to make usable energy (ATP)

• Goes through photosynthesis to make glucose

• Controls what goes in and out of the cell

• Controls the cell processes and stores DNA/genetic material.

Drag and Drop

The (a) ​

Placeholder

are responsible for converting glucose (food) into (b) ​

Placeholder

for the cell.

Drag these tiles and drop them in the correct blank above

mitochondria

energy

nucleus

DNA

ribosomes

Match

Match the following:

• Multicellular, does not have a cell wall

• Multicellular, has chloroplasts and a cell wall

• Unicellular, has flagella to help it move

Animal Cell

Plant Cell

Bacteria Cell

• Animal Cell

• Plant Cell

• Bacteria Cell

If an organelle stops working...

...the cell dies.

All the organelles inside of a cell need to work together to keep it alive. If one or more organelles stop working, or it runs out of energy, the entire cell will die. If enough cells die, the organism will die.

Multiple Choice

If a cell inside of an organism was unable to exchange food, water, and other important materials, what would happen to it.

• The cell would produce new cells, making the organism grow.

• This would not help or harm the cell.

• The cell would attack other cells.

• The cell would not be able to survive.