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cell molec

by: Gabriela Montalvo

cell molec BIL 255

Gabriela Montalvo

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Cellular and Molecular Biology
Dr. Baker
Cell Molec
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This 3 page Bundle was uploaded by Gabriela Montalvo on Tuesday February 16, 2016. The Bundle belongs to BIL 255 at University of Miami taught by Dr. Baker in Fall. Since its upload, it has received 53 views. For similar materials see Cellular and Molecular Biology in Biology at University of Miami.

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Date Created: 02/16/16
Chapter 1 and 2 quiz 1. Monosaccharides are the simplest sugars 2. Endoplasmic reticulum is an irregular maze of interconnected spaces enclosed by a membrane and is the site where most cell membrane components, as well as materials destined for export from the cell are made 3. The reverse of a condensation is a hydrolysis reaction 4. The type of bond that links nucleotides in a nucleic acid chain are phosphodiester bond 5. Vesicles mediates the exchange of materials between the endoplasmic reticulum, Golgi apparatus and the outside of the cell 6. In plant cells, a tough cell wall doesn’t take the place of a cytoskeleton 7. The smallest particle of an element that retains its distinctive chemical properties are atoms 8. Substances held together by ionic bonds are called salts 9. The atomic weight of an an atom is its mass relative to 10.All cells DON’T require oxygen to live 11.A carboxylic acid and amino group and hydrogen bond are found on all amino acids 12. DNA contains sequences that ?? 13. A cytoskeleton is made up of Actin filaments (also called microfilaments)  Intermediate filaments and. Microtubules. 14.Protein, nucleic acid, and polysaccharide molecules polymerize by condensation reaction 15.Acetic acid is a weak acid 16.Ribosome can’t be resolved with a conventional light microscope 17.Evolution is the process by which genetic change occurs followed by selection 18.Scientists study yeast because 19.A single bond allows for rotation about the bond size 20.Acids release protons in water and the pH of water is less than 7 21.If two different genes from different organisms are similar, it is NOT highly possible they come from a common ancestral gene 22.Liver cells and kidney cells are different because different cells express different genes and have different roles in the body 23.Prokaryotic cells don’t contain a nucleus or any other membrane bound organelle 24.The largest single component in most cells is the cytosol 25.Endocytosis is the name of the process by which eukaryotic cells engulf material captured from an external medium 26.Hydrophilic molecules mix well with water 27.Noncovalent bonds make it possible for a macromolecule to interact with great specificity with just one out of many different molecules present inside a cell 28.Polar is a covalent bond in which electrons are shared unequally 29.Common ancient ancestor was 3.5-3.8 billion years ago 30.Mitochondrion was likely engulfed by primitive eukaryotes to help the cell survive in an oxygen-rich atmosphere 31.Amino acids are subunits of nucleic acids 32.Covalent bonds form when one atom donates electrons to another 33.Amphipathic best describes a fatty acid 34.At a molecular level, the members of the two domains of prokaryotesãthe archaea and bacteria differ as much from each other as either does from the eukaryotes. 35.The DNA in the nucleus of eukaryotic cells is separated from the cytoplasm by the nucleus envelope 36.In water, hydrogen bonds form between oxygen atom and hydrogen atom 37.In living organisms, carbon hydrogen nitrogen and oxygen make up 96.5% of an organisms weight 38.Homologous describes genes (and gene products) related by a common ancestral gene 39.The cytoskeleton pulls duplicated chromosomes to opposite poles in dividing cells, transport organelles and molecules from one place to another, and control cell shape and movement 40.Carbon, which has four electrons in its outer shell can form a max of 4 covalent bonds with other atoms 41.Protons and neutrons have essentially the same mass 42.Zebra fish is frequently studied as a model vertebrate 43.Base pairing in DNA is A:T and G:C 44.The bond between carbon and hydrogen is nonpolar. Oxygen and hydrogen AND nitrogen and hydrogen are polar 45.Polysaccharides contain hundreds or thousands of sugar subunits Quiz 2 1. The most common covalent cross-links in proteins are sulfur-sulfur bonds that form between two amino acids with -SH (thiol) groups as side chains. Which amino acid has this side chain? 2. Alpha helices and beta sheets are common folding patterns in polypeptides because amino acid side chains are not involved in forming the hydrogen bonds, allowing many different sequences to adopt these folding patterns 3. The release of the terminal phosphate group releases a large amount of energy 4. The overall free-energy change for coupled reactions is equal to the sum of the free-energy changes for each individual reaction. 5. The conversion of sunlight into energy stored in chemical bonds during photosynthesis and the metabolism of nutrients in order to produce energy follows the first law of thermodynamics 6. ?? determines the specificity of an antibody for its antigen 7. The protein amino acid sequence provides the information necessary to specify the three-dimensional shape of a protein 8. The large-scale production or proteins DONT requires processing vast amounts of tissue and other biological materials. 9. The structure that allows each duplicated eukaryotic chromosome to be separated during M phase is a centromere 10.Which hydrogen bonds have been found to stabilize a polypeptide's folded shape? Hydrogen bonds between side chain atoms, Hydrogen bonds between backbone atoms, and Hydrogen bonds between backbone atoms and side chain atoms 11.The GTP-bound form of a GTP-binding protein switches to a GDP-bound form by hydrolyzing GTP, releasing a phosphate 12.For every 1.42 kcal/mole difference in free energy at 37°C, K changes by a factor of 10 13.The loss of energy allows a chemical reaction to be spontaneous (a negative delta G) 14.The measure of disorder is entropy 15.A phosphatase removes a phosphate group from a protein (A kinase adds phosphate group) 16.Actin filaments, microtubules, and the spherical shells of some virus particles are all structures built from sets of identical proteins 17.Electromagnetic (light) energy to chemical bond energy characterizes photosynthesis 18.The ΔG° of the hydrolysis reaction of ATP is -7.3 kcal/mole, but in a cell the actual ΔG is much more negative because ATP is higher


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