A group of atoms joined by a chemical bond is called a: A- Element b- Ion...
A group of atoms joined by a chemical bond is called a:
A- Element
b- Ion
c- Nucleus
d- Molecule
The cell's plasma membrane repels water and is composed primarily of which macromolecule ?
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A- Carbohydrate |
||
|
b- Lipid |
||
|
c- Protein |
||
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d-Nucleic acid |
Enyzmes are molecules that speed up chemical reactions. The are an example of what type of macromolecule?
|
A- Carbohydrate |
||
|
B- Lipid |
||
|
C- Protein |
||
|
D- Nucleic acid |
Which polysaccharide is made by plants and used as structure because of its strong properties (bark of trees, cell wall of plants, etc)?
|
Glucose |
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Sucrose |
||
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Starch |
||
|
Cellulose |
Homework Answers
D. Molecules
Atoms are held together by covalent bond and they form molecules
B. Lipid
It is present in cell plasma membrane and it is hydrophobic in nature ( phospolipids)
C. Protein
Enzymes are protein macromolecules.
D. Cellulose
It is the major polysaccharides and is responsible for structural role
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