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Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: psiu2 on Sep 12, 2010 Which Complex carbohydrate contains only a-1, 4-glycosidic linkages?
A) Amylopectin B) Cellulose C)Amylose D) Glycogen E)Glucose Which of the following complex carbohydrates is listed with its correct function? A) Chitin:constituent of bacterial cellwalls B) Cellulose: structural component of plant cell walls C) amylose:main componenty of plant starch D) Starch: Primary energy - Storage molecule in animals E)Amylopectin: Key structural component in the exoskeleton of insects I think its D, Which polysaccharide contains a modified monosaccharide? A. Cellulose B. Peptidoglycan C. Glycogen D. Starch E. None of the above 7. How can a lipid be distinguished from a sugar? A. Lipids are mostly highly charged. B. A lipid dissolves in water. C. Lipids are mostly nonpolar. D. A lipid is made up of only hydrocarbons. E. Lipids have many hydroxyl groups on them compared to sugars. 8. Which of the following particles could diffuse easily through a cell membrane? A. Glucose B. Hydrogen ion (H+) C. Sodium ion (Na+) D. Oxygen (O2) E. None of these molecules easily pass through cell membranes 9. Which statement is true? A. Prokaryotic organisms lack ribosomes B. Chloroplasts lack any internal membranes C. Prokaryotic ribosomes are composed of a large subunit and a small subunit D. Flagella enable movement of the nucleus within a prokaryotic organism E. There are typically between 10-20 ribosomes in a prokaryotic cell. 10. Which of the following are not in or part of a nucleus? A. Euchromatin B. Heterochromatin C. Nucleolus D. nuclear pores E. They are all part of or in the nucleus 11. Which polymers are composed of amino acids? A. Monomers B. Carbohydates C. Proteins D. Nucleic acids E. Lipids 12. Which of the following is not attached to the central carbon atom in an amino acid? A. A carboxyl functional group B. An amino functional group C. A side chain ("R group") D. An oxygen E. They are all attached to the central carbon atom in an amino acid. 13. Which of the following statements about the formation of polypeptides from amino acids is true? A. Polypeptides form by condensation or hydrolysis reactions. B. A bond can form between any carbon and nitrogen atom in the two amino acids being joined. C. The reaction occurs through the addition of a water molecule to the amino acids. D. A bond forms between the carboxyl functional group of one amino acid and the amino functional group of the other amino acid. E. The reaction always involves a link with a carbohydrate. 14. What scientific hypotheses can be tested by a pulse-chase experiment? A. Movement of molecules through a cell over time B. Molecular zip code of a protein C. Solubility of a molecule D. The steady-state amount of protein in a cell E. Enzyme concentration within a cell 15. What is the first step in a pulse-chase experiment? A. Incubating cells with a labeled molecule B. Preparing cells for electron microscopy C. Examining cells for the location of the labeled molecules D. Incubating cells with an unlabeled molecule E. None of the above 16. What path does a protein in the secretory pathway take, starting from its site of synthesis? A. Rough ER, secretory vesicles, Golgi apparatus, plasma membrane B. Golgi apparatus, rough ER, secretory vesicles, plasma membrane C. Rough ER, Golgi apparatus, secretory vesicles, plasma membrane D. Plasma membrane, secretory vesicles, Golgi apparatus, rough ER E. Plasma membrane, Golgi apparatus, rough ER, secretory vesicles 17. During a pulse-chase experiment, photographic emulsions were prepared at different times during the chase, and radioactive spots were detected at the following times and locations: 5 minutes: rough ER; 10 minutes: Golgi apparatus; 40 minutes: endosomes; 70 minutes: lysosomes; 140 minutes: lysosomes. Which of the following conclusions can be drawn from these results? A. The proteins did not travel through the Golgi apparatus. B. The proteins traveled from lysosomes to endosomes. C. The proteins were secreted. D. The final destination of the proteins was the lysosome. E. The proteins regulated the function of a critical gene in the nucleuls 18. Which of the following statements is true of the bonds in a water molecule? A. Oxygen acts as the electron acceptor and is oxidized. B. The electron in each hydrogen atom is completely transferred to the oxygen atom, and each hydrogen atom has a net charge of +1. C. Oxygen holds electrons more tightly than hydrogen does, and the net charge is zero. D. There is equal sharing of the electrons between the oxygen atom and the two hydrogen atoms, and the net charge is zero. E. None of the above. 19. For what discovery is Osamu Shimomura best known? A. Discovery of the molecule green fluorescent protein B. Creator of the compound microscope C. Discovery of antibacterial resistance D. Discovery of small energetic molecules in distant solar systems E. Creator of amino acids from small precursor molecules. 20. Martin Chalfie was the first person to accomplish what? A. extraction of green fluorescent protein from jellyfish B. expression of green fluorescent protein in bacteria and other cells C. modification of green fluorescent protein to fluoresce with a red color D. pulse-chase experiment to examine the location of proteins in a cell E. none of the above 21. Propose a function for cells that contain extensive smooth endoplasmic reticulum A. production and processing of fatty acids and other lipids B. movement of the cell by cell crawling C. storage of large amounts of starch D. production of large amounts of muscle proteins after exercise E. none of the above 22. Eukaryote cells in a multicellular organism do not generally have which of the following? A. Chromosomes B. DNA C. Nucleus D. flagella E. ribosome 23. What is the molecular formula for peroxide? A. H20 B. COH C. COOH D. H2O2 E. HOHOH Match the listed items below with the terms that follow: 24. primary structure 25. secondary structure 26. tertiary structure 27. quaternary structure 28. peptide bond A. hemoglobin’s four subunits B. van der Waal interactions between hydrophobic groups C. hydrogen bonds between amino and carboxyl ends of amino acids D. a portion of a protein that is composed of lysine-lysine-arginine E. a link between nitrogen and carbon 29. The lysosome is characterized by A. A highly acidic interior B. The presence of many ribosomes C. many proteins that are to be secreted from the cell D. having a nucleolus E. the presence of many mitochondria 30. Which are components of the cell’s cytoskeleton? A. Actin filaments B. intermediate filaments C. microtubules D. All of the above E. None of the above 31. Microtubules interact with what protein to ferry vesicles from one place in the cell to another? A. Actin filaments B. intermediate filaments C. kinesin D. catalase E. glucose 32. Which of the following typically distinguish animal from plant cells? A. Presence of mitochondria B. Presence of a cell membrane C. Presence of a cell wall D. Presence of a mitochondria E. Presence of ribosomes 33. A vacuole in a plant cell A. indicates a diseased and dying cell B. Is always present in the nucleus of the cell C. could act as a storage area for oils, carbohydrates, water or toxins D. indicates a problem with the chloroplast E. usually is where the cell nucleus is located 34. One common use of a centrifuge would be to A. follow the passage of proteins as they travel in a cell with time B. Reveal the structure of the plasma membrane C. separate and isolate various organelles of a cell D. Allow cells and proteins to be labeled with fluorescent indicators E. none of the above 35. If 10 amino acids are strung together, the potential variety of polymers that could be produced is about A. 10 B. 10,000 C. 10 million D. 16,500 billion E. infinite Match the functional group with its property 36. hydroxyl group 37. sulfhydral group 38. carboxyl group 39. carbonyl group 40. amino group A. acts as a base – tends to attract a proton B. reacts with compounds of the form HR2 to produce larger molecules C. acts as an acid – tends to lose a proton D. when present can form disulfide bonds that can contribute to protein Structure E. highly polar, so makes compounds more soluble through hydrogen bonding with water. 41. In a polypeptide, what is most responsible for the secondary structure called an alpha helix? A. The sequence of amino acids B. hydrogen bonds that form between carboxyl and amino groups on different residues C. hydrogen bonds and other interactions between side chains D. the number, identity, and arrangement of polypeptides that make up a protein. E. None of the above 42. By convention, biologists write the sequence of amino acids in a polypeptide in which direction? A. carboxy-to amino terminus B. amino-to carboxy terminus C. polar residues to non-polar residues D. charged residues to uncharged residues E. none of the above 43. A mutation results in the substitution of a glycine in place of an alanine in one spot in a protein. The likely change in the protein is likely to be A. Very small B. Moderately disruptive C. Quite disruptive 44. A mutation results in the substitution of a glutamate in place of a valine in one spot in a protein. The likely change in the protein is likely to be A. Very small B. Moderately disruptive C. Quite disruptive 45. Enzymes are catalysts that work by A. lowering the energy of the reactants B. raising the energy of the reactants C. lowering the energy of the products D. raising the energy of the products E. lowering the energy needed to reach the transition state 46. Which of the following were NOT high energy molecules produced in the experiments done by Stanley Miller? A. amino acids B. formaldehyde C. cyanide D. carbon dioxide and ammonia E. They were all produced during the experiments 47. A compound binds to a site on an enzyme where the substrate for a reaction normally binds. This results in A. Allosteric inhibition B. Competitive inhibition C. Cooperative inhibition D. Non-cooperative inhibition E. unilateral inhibition The compounds glucose and galactose differ in A. the number of carbons B. the number of OH groups C. the number of double bond oxygens D. the amino portion of the compound E. the position of a single OH group When two glucose molecules are joined together, what is formed? A. a peptide bond B. a disaccharide C. starch D. water E. B & D Penicillin acts by A. disrupting hydrogen bonds between carbohydrates B. inhibiting DNA synthesis C. blocking the action of an enzyme which links strands of carbohydrates together via peptide bonds D. inhibiting the formation of glycosidic linkages E. increasing the strength of the bacterial cell wall. Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: sarah! on Sep 12, 2010 hi psiu2!
1. a) Amylose - Answer. a-1,4-glycosidic linkages and a-1,6-glycosidic linkages in amylopectin and glycogen. beta 1,4-glycosidic linkages in cellulose. What textbook is this for? Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: sarah! on Sep 12, 2010 2.
B) Cellulose: structural component of plant cell walls Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: psiu2 on Sep 12, 2010 biological science freeman 4th edition. thanks for all the help so far!!
Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: sarah! on Sep 12, 2010 does it have a penguin in front of the textbook?
Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: psiu2 on Sep 12, 2010 yupp thats the one.
Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: sarah! on Sep 12, 2010 7. How can a lipid be distinguished from a sugar?
A. Lipids are mostly highly charged. B. A lipid dissolves in water. C. Lipids are mostly nonpolar. D. A lipid is made up of only hydrocarbons. E. Lipids have many hydroxyl groups on them compared to sugars. Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: sarah! on Sep 12, 2010 When two glucose molecules are joined together, what is formed?
A. a peptide bond B. a disaccharide C. starch D. water E. B & D 8. Which of the following particles could diffuse easily through a cell membrane? A. Glucose B. Hydrogen ion (H+) C. Sodium ion (Na+) D. Oxygen (O2) E. None of these molecules easily pass through cell membranes but rather than having me go through all these, why don't you mark down the ones you are having trouble with, since most of them seem straight forward. Sarah Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: karim89 on Sep 12, 2010 Penicillin acts by
A. disrupting hydrogen bonds between carbohydrates B. inhibiting DNA synthesis C. blocking the action of an enzyme which links strands of carbohydrates together via peptide bonds D. inhibiting the formation of glycosidic linkages E. increasing the strength of the bacterial cell wall. The compounds glucose and galactose differ in A. the number of carbons B. the number of OH groups C. the number of double bond oxygens D. the amino portion of the compound E. the position of a single OH group 42. By convention, biologists write the sequence of amino acids in a polypeptide in which direction? A. carboxy-to amino terminus B. amino-to carboxy terminus C. polar residues to non-polar residues D. charged residues to uncharged residues E. none of the above 33. A vacuole in a plant cell A. indicates a diseased and dying cell B. Is always present in the nucleus of the cell C. could act as a storage area for oils, carbohydrates, water or toxins D. indicates a problem with the chloroplast E. usually is where the cell nucleus is located Which of the following complex carbohydrates is listed with its correct function? A) Chitin:constituent of bacterial cellwalls B) Cellulose: structural component of plant cell walls C) amylose:main componenty of plant starch D) Starch: Primary energy - Storage molecule in animals E)Amylopectin: Key structural component in the exoskeleton of insects 9. Which statement is true? A. Prokaryotic organisms lack ribosomes B. Chloroplasts lack any internal membranes C. Prokaryotic ribosomes are composed of a large subunit and a small subunit D. Flagella enable movement of the nucleus within a prokaryotic organism E. There are typically between 10-20 ribosomes in a prokaryotic cell. Title: Which Complex carbohydrate contains only a-1, 4-glycosidic linkages? Post by: nite_n_day on Sep 14, 2010 The compounds glucose and galactose differ in
A. the number of carbons B. the number of OH groups C. the number of double bond oxygens D. the amino portion of the compound E. the position of a single OH group When two glucose molecules are joined together, what is formed? A. a peptide bond B. a disaccharide C. starch D. water E. B & D Penicillin acts by A. disrupting hydrogen bonds between carbohydrates B. inhibiting DNA synthesis C. blocking the action of an enzyme which links strands of carbohydrates together via peptide bonds D. inhibiting the formation of glycosidic linkages E. increasing the strength of the bacterial cell wall. |