Unit 3: Lesson 1-3 Cell T., Chem. of life, Cell Strc. & func.

Why did these kids think they found a living organism when they looked at it under the microscope?

• The object was green.

• They saw minerals in it.

• The object was made of cells.

• The object was made of carbon.

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All living things are made of one or more cells. What is true of all cells?

• They all have DNA in their cytoplasm.

• They all have DNA in their nucleus.

• They all have cytoplasm.

• They all have organelles bound by membrane. They all have DNA in their nucleus.

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Which of the following is a characteristic of multicellular organisms?

• obtaining food having organelles

• having organelles

• being able to move

• having specialized cells

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How does the part of the cell labeled A help us know we are looking at a prokaryotic cell?

• "A" is the nucleus, which is found only in prokaryotic cells.

• "A" is DNA, which is not enclosed in a nucleus, as in eukaryotic cells.

• "A" is cytoplasm, which is only found in prokaryotic cells.

• "A" is the cell membrane, which is found only in prokaryotic cells.

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Eukaryotic cells & prokaryotic cells have some parts in common. Which parts are in both?

• cell membrane and membrane-bound organelles

• cytoplasm and nucleus

• DNA and membrane-bound organelles

• cell membrane and cytoplasm

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Which of these is the smallest?

• cell membranes

• atoms

• cells

• molecules

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Dog foods can contain corn and wheat that give dogs carbohydrates. Why are carbohydrates important to cell processes?

• They are a source of energy.

• They help chemical processes happen.

• They make amino acids.

• They form cell membranes.

What happens if the concentration of water inside a cell is higher than the concentration of water outside a cell?

• The cell will remain unchanged.

• The cell will burst.

• Water will move into of the cell.

• Water will move out of the cell.

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Lipids are vital- they help keep cells working properly. What is one way the cells in our bodies use lipids?

• to carry information in the cell

• to form cell membranes

• to repair broken bones

• to make amino acids

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Which is one of the six most common elements found in the human body?

• water

• oxygen

• iron

• helium

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