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Why is water described as the universal solvent?
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What property of water is directly responsible for the formation of water droplets when it rains?
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Biochemistry
| Question | Answer |
|---|---|
| Why is water described as the universal solvent? | Polarity |
| What property of water is directly responsible for the formation of water droplets when it rains? | Cohesion |
| What causes the high surface tension in regards to the molecular interactions between water molecules? | Hydrogen Bonding |
| True or False: Oil should accumulate with the greatest volume on a nickel due to its high polarity. | False |
| What kind of bond is formed when electrons are transferred between atoms with high electronegativity difference in a molecule? | Ionic |
| The oxygen atom in a molecule of water has what partial charge? | Negative |
| The oxygen atom in a molecule of water has what partial charge? | Hydrogen Bonding |
| What property of water allows it to stick to certain surfaces? | Adhesion |
| What property of water allows it to stick to certain surfaces? | Surface Tension |
| Which properties of water are most important for water transport in plants? | Cohesion and Adhesion |
| In reference to water, what do cohesion, surface tension, and adhesion all have in common? | Hydrogen Bonds |
| What kind of bond results when electrons are evenly shared within a molecule? | Non-Polar Covalent |
| Water is considered to be which type of molecule? | Polar Covalent |
| The property of water the contributes to its ability to stick to itself is called: | Cohesion |
| What kind of bond results when electrons are unevenly shared within a molecule? | Polar Covalent |
| True or False: If a solution of soap and water is added to the surface of a nickel, you would expect a smaller volume to accumulate on the surface as compared to pure water. | True |
| The tendency to attract electrons. | Electronegativity |
| What is the monomer of nucleic acid? | Nucleotides |
| How many nucleic acid strands does DNA have? | Two |
| How many nucleic acid strands does RNA have? | One |
| What does DNA stand for? | Deoxyribose Nucleic Acid |
| What does RNA stand for? | Ribose Nucleic Acid |
| What type of bond connects the nitrogen bases of 2 nucleotides? | Hydrogen Bonds |
| What is the type of bond that links the sugar of one nucleotide to the phosphate of the next? | Covalent Bonds |
| What type of isomer is galactose? | Structural |
| What type of isomer is fructose? | Structural |
| What type of isomer is alpha-glucose and beta-glucose? | Geometric |
| Chiral isomers are not... | Superimposable |
| If a polymer were to be broken, what kind of reaction would it need? | Hydrolysis |
| If two monomers were to bond, what kind of reaction would it need? | Dehydration |
| Two alpha glucose create... | Maltose |
| Glucose and galactose create... | Lactose |
| Glucose and fructose create... | Fructose |
| What are cellulose and chitin used for? | Structure |
| What are glycogen and starch used for? | Energy Storage |
| What is the source of cellulose and starch? | Plants |
| An amine group and carboxylic acid group are part of... | Amino Acids |
| How many fatty acid tails do triglycerides have? | Three |
| True or False: Unsaturated fats are caused by the presence of double or triple bonds. | True |
| Nucleotides have a sugar group, phosphate group, and a... | Nitrogenous Base |
| What are proteins made of? | Amino Aids |
| To hasten a biological reaction, enzymes ___________ the activation energy to increase speed. | Decrease |
| If two monomers were to bond, what kind of reaction would it need? | False |
| In what level of structure does hydrogen bonding and disulfide bonding between the side chains occur? | Tertiary |
| True or False: Any order of amino acids will provide the same shape as long as they are in the same environment. | False |
| In what level of structure are amine and carbonyl groups relevant? | Secondary |
| True or False: The polypeptide chains in the quaternary level are held together by non-polar covalent bonds. | False |
| Name the enzyme inhibitor that will take the place of a substrate in its active site. | Competitive |
| In the lab, low temperatures would cause what to happen to the enzyme function? | Slow |
| What type of macromolecule is an enzyme? | Protein |
| What reaction does peroxidase deal with? | Hydrogen Peroxide |
| True or False: Glucose could freely cross the cell membrane. | False |
| A dialysis bag, after 24 hours, has gained mass. The bag, in comparison to the solution, would be classified as: | Hypertonic |
| A dialysis bag, after 24 hours, has gained mass. The solution, in comparison to the bag, would be classified as: | Hypotonic |
| To maintain the fluidity of the phospholipid bilayer of a cell membrane, _________ is used. | Cholesterol |
| What is the purpose of cholesterol in the cell membrane? | Carrier Protein |
| The fatty acid tails in a phospholipid bilayer are pointed inwards because they are... | Hydrophobic |
| What does biuret test for? | Protein |
| What does iodine test for? | Starch |
| What does Benedict's test for? | Glucose |
| What is a solution called when there is a high concentration of solute and a low concentration of solvent? | Hypertonic |
| What is a solution called when there is a low concentration of solute and a high concentration of solvent? | Hypotonic |
| What is a solution called when there are equal concentration of solvent and solute? | Isotonic |
| The transfer of a solvent from high concentration to low concentration. | Osmosis |
| The transfer of a solute from high concentration to low concentration. | Diffusion |
| What doe active transport need that passive transport doesn't? | ATP |
| True or False: Molecules will naturally move from a high concentration to a low concentration. | True |
| Movement of molecules across the cell membrane where energy is required is called: | Active Transport |
| Movement of molecules across the cell membrane where energy is not required is called: | Passive Transport |
| What cannot enter the phospholipid bilayer at all? | Polymers |
| True or False: Ions and monomers cannot directly pass the cell membrane. | True |
| True or False: Gas, water, and small molecules must enter the cell membrane through protein channels. | False |
| True or False: The cell membrane is selectively permeable. | True |
| The primary structural level of an enzyme deals with the sequence of what monomer? | Amino Acids |
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akhoangg
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