Practice Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The diffusion of water molecules across a selectively permeable membrane is? | Osmosis
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| Maintaining a normal blood sugar or blood pH is? | Homeostasis
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| What kind of bond holds the atoms of a single water molecule together? | Covalent bonds that are polar
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| Which of the following are found in the nucleus of an atom? | Neutrons and protons
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| A carbon can form up to ___ bonds with other atoms. | 4
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| The most important physical characteristic of lipids with regard to living organisms is that they? | Are hydrophobic
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| Saturated fatty acids are so named because they are saturated with? | Hydrogen
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| A neutral atom must contain? | An equal number of protons and electrons
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| Is a membranous organelle that chemically modifies and ships proteins to other organelles or out of the cell. | Golgi bodies
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| Red blood cells placed into distilled water will? | Swell and rupture as water moves into the cell
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| What structures move proteins from the ER to the Golgi apparatus? | Transport vesicles
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| What describes the water in sugar-water solution? | Solvent
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| What can diffuse directly across plasma membranes, moving right through the phospholipid bilayer? | CO2 and O2
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| Refers to the inner open space or cavity of a tubular organ, such as of blood vessel or intestine | Lumen
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| High temperatures or changes in pH can permantly disrupt protein structure and function. This is called? | Denaturation
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| Eukaryotic cells differ from prokaryotic cells in that they have a membrane-bound _____ that contains the genetic material. | Nucleus
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| Group of cells that carry out a certain function is? | Tissue
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| A blind experiment is one in which? | Subjects do not know if they are in the experiment or not.
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| The campus occupys? | A community
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| Chemical reactivity and the formation of chemical bonds between atoms is a function of what subatomic particles? | Electrons
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| What is the function of the plasma membrane? | Regulation of the passage of material into and out of the cell
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| Fats are composed of glycerol and ____ which can both be metabolized for the production of ATP. | Fatty acids
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| Which organelle contains digestive enzymes? | Lysosomes
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| The polysaccharide that is a storage form of glucose in the liver and muscle cells in humans is? | Glycogen
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| Proteins that speed up chemical reactions in the body are called? | Enzymes
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| Function of protein synthesis | Ribosome
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| Which of the following is not a disaccharide? | Galactose
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| What are the functions of endoplasmic riticulum? | Lipid and steroid synthesis
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| What is both found in eukaryotic and prokaryotic cells? | Ribosomes
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| How are protons, electrons, and neutrons are arranged into atoms and ions? | Protons and neutrons are inside of the nucleus and electrons are outside of the nucleus
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| What is a ionic bond? | Total transfer of electrons forming ions, attraction between ions with opposite charges
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| What is a hydrogen bond? | Occurs between a hydrogen atom and an oxygen atom
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| What is a covalent bond? | Sharing of electron pairs between atoms
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| What is dehydration synthesis or condensation reaction? | Removal of water. (OH from one monomer and H from another)
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| What is hydrolysis? | Water is used to break bond. Enzymes split molecules into two or more parts.
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| What does DNA stand for? | Deoxyribonucleic acid
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| Definition of denatured. | breaking of many of the weak linkages, or bonds (e.g., hydrogen bonds), within a protein molecule.
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| What are the four levels of structure in proteins. | Primary structure, secondary structure, tertiary structure, and quaternary structure.
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| What is the neutral pH level? (Base) | 7.0
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| Acidic solutions have what level of pH? | Greater than 7
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| Basic solutions have what level of pH? | Less than 7
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| What are the three groups of carbohydrates? | Monosaccharide, disaccharide, and polysaccharides
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| Triglyceride | 3 fatty acids + glycerol
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| Phospholipids | Cell membrane component. 2 fatty acids + glycerol + phosphate
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Created by:
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