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60 Cards in this Set
- Front
- Back
What two substances relating to life were found in the Mars meteorite.
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carbon containing molecules(polycyclic aromatic hreocarbons) and crystals of magnetite.
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Conditions of primitive Earth led to the emergence of large molecules unique to life.
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chemical evolution
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In the Urey-Miller experiment, what kinds of large molecules were created when primative atmospheric conditions were simulated?
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amino acids, purines, and pyrimidines
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How has the view of the prehistoric atmosphere changed since the Miller-
Urey experiment? |
C02, N2, H2S and SO2 were in the atmosphere as well.
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Which conditions provide the best environment to bind monomers?
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solid mineral surfaces
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What are the four kinds of macromolecules?
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proteins,lipids, carbohydrates, nulceic acid
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Giant polymers.
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macromolecules
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The ractions that form polymers from monomers (two names)
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condensation reactions or dehydration reactions.
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A reaction that breaks polymers into monemers.
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hydrolysis reaction
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What are some functions of proteins?
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structural support, protection, catalysis, defense, regulation, and movement.
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What two macromolecule functions are not performed by proteins.
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energy storage and information storage
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A monomer part of a polymer.
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residue
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What atom are amino acids centered on?
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carbon
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what are the three groups of side chains?
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electrically charged hydrophilic, polar uncharged hydrophilic, and nonpolar hydrophobic
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What are the three special cases of amino acids?
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cysteine, glycine, and proline
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The covalent bond formed between two cyseine side chains.
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disulfide bridge
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The carboxyl group of one amino acid reacts with the amino goup of another undergoing a condensation reaction that forms a peptide linkage.
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peptide linkage
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What are the four major macromolecules?
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Proteins, carbs, lipids, nucleic acids.
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What units can polymers be divided into?
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monomers
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What links link monomers together to form polymers?
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covalent bonds
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What reaction are macromolecules made from?
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condensation or dehydration reaction.
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What is the reverse reaction of a dehydration reaction?
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hydrolysis
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What two things does hydrolysis need to occur?
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Energy and enzymes.
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What two carbs serve as structural components?
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celulose and chitin
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What are the four categories of carbs?
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monosaccharides, di-, oligo-, poly-
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What are two types of polysaccharides?
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starch and gylcogen
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Carotinoids, which capture light enrgy, are which type of macromolecule?
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lipids
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Hormones and vitamins are which type of macromolecule?
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lipids
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What kind of macromolecule repels water?
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lipids
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What kind of liquid fatty acid has kinks which make it difficult to pack?
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unsaturated fatty acids
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In a phospholipid, which part is polar and which part is nonpolar?
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HEads are polar, they interact with water, tails are nonpolar, they don't interact with water. These make good water repellants when the tails are to the inside of a membrane.
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Organic compunds with a series of fused ring.
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steroids
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This synthesizes testosterone and estrogen.
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cholesterol
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Nucleic acid that stores info
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DNA
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Nucleic acid that transports info
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RNA
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What are the three parts of a nucleotide?
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pentose sugar, a phosphate group, and a nitrogen containing base
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what are the base letters for dna?
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gatc
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What are the base letters for RNA?
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GAUC
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Which kind of nucleic acid is double stranded and which is single stranded
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rna single, dna double
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Which dna base pairs are connected by double bonds and which are connected by triple bonds>
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AT double, CG triple
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What happens when hydrogen bonding occurs in RNA
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complicated 3d shape
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What is the central dogma?
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genes>dna>ran>protein
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RNA molecules that can axt as catalysts
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ribozymes
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What type of macromolecule is ATP?
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nucleic acid (A is a base)
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What is the role of ATP?
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energy transducer
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What are the five parts of an amino acid?
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central carbon, a hydrogen, an amino group, a carboxly group, and an r group/side chain
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What part of an amino acid determines the type of amino acid?
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it's rgroup
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What are the bonds that form between amino acids called?
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peptide bonds
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What is formed when amino acids link?
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water
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what two groups connect when amino acids link?
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carboxyl and amino
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What are the four levels of proteins?
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primary, secondary, tertiary, and quaternary
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these links form between cysteine residues
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disulfide bridges
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what is the one macromolecule that doesn't contain nitrogen?
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lipids
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What does a primary chain consist of?
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repeating amino acids
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What are the two possible secondary structures?
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alpha helix and beta pleats
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What defines are quatenary structure?
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subunits, tertiary structures that react with eachother
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What determines the reactions within tertiary groups?
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rgroup interactions
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Term that refers to a monomer when it's part of a polymer
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residue
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The loss of a protein’s normal three-dimensional structure. Also loses the normal biological function of the protein. Often irreversible.
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Denaturation
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Prevent inappropriate protein interactions.
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Chaperonins
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