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5
×
What does semi-permeable mean?
Only certain materials can cross the cell membrane.
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boom
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star
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rocket
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banana
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10
×
Which of the 8 characteristics of life does the cell membrane help the cell achieve?
All organisms must maintain homeostasis.
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15
×
What is the cell theory?
All living things are made of cells; Cells are the basic unit for life; Cells come from other cells.
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trap
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rocket
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rocket
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thief
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25
5
×
What is an independent variable?
The factor in an experiment that the scientist changes.
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20
×
What are the monomer subunits of proteins called?
amino acids
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15
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What is an isotope--give an example.
An isotope is an atom with a different number of neutrons. C-13 is an isotope.
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10
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What is reasoning?
Explanation or justification based on evidence or previous knowledge.
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5
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What are the three classes of macromolecules that are polymers?
Proteins Carbohydrates Nucleic Acids
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eraser
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magnet
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gift
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baam
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15
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Cellulose is a chain of glucose molecules hooked together. It stores energy in plants. Which type of macromolecule (polymer) is cellulose?
Polysaccharide (carbohydrate)
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monster
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gold
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fairy
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thief
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20
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Explain whether or not a monosaccharide is a macromolecule.
It is not, because it is a monomer, which is the subunit (smaller piece) of a polymer. Polymers are macromolecules.
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10
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If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number is..
7 (3 protons + 4 nuetrons)
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10
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What are the monomer subunits for nucleic acids called?
nucleotides
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