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21 Cards in this Set
- Front
- Back
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The greatest concentration of hydrogen ions are found in high or low ph Solutions?
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Low pH solutions
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In a singly molecule of water, the two hydrogen atoms are bonded to a single oxygen atom by?
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polar covalent bonds
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In a neutral solution the concentration of hydrogen ions is equal/greater/less than hydroxide ions
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equal
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What do cohesion, surface tension, and adhesion have in common with reference to water?
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All are properties related to hydrogen bonding
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All of the following
Nucleic acids steroids phosphate groups proteins lips are part of the cell membrane except? |
nucleic acids
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In Salt, what is the nature of the bond between sodium and Chorine?
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Ionic
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What is both tru of both starch and cellulose?
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They are both used for energy storage in plants
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All of the following nitrogenous bases are found in DNA except:
Cytosine, Adenine, Uracil, Thymine, Guanine |
Uracil
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Hydrophobic substances such as vegetable oil are
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nonpolar substances that repel water molecules
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What determines the cohesiveness of water molecules?
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Hydrogen bonds
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What do atoms form when they share election pairs?
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molecules
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Which of the following is NOT one of the four major groups of macro molecules found in living organisms?
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?????
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What element is found in all organic compounds?
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carbons
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Which solution has the greatest concentration of hydroxide ions (OH-)
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High pH
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What is the most common route for membrane flow in the endomembrane system?
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rough ER -- vesicles-- Golgi-- plasma membrane
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What is a characteristic of membrane phospholipids?
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They can move laterally along the plane of the membrane.
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What distinguishes a hypothesis from a theory?
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????
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The two strands making up the DNA double helix molecule are?
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held together by hydrogen bonds
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What is a hypothesis?
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a tentative explanation that can be tested and is falsifiable.
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The chemical reactions within cells are regulated by organic catalysts called?
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enzymes
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What property of water is responsible for water transport in plants?
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cohesion
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