[SOLVED] Which of the following statements is correct

> The aggregations of fatty acid anions that form when a soap is added to water are called .

> Fatty acid anions make good soaps because they have both a portion that is miscible with water and a portion that is miscible with grease.

> The process of involves treating a fat with sodium hydroxide so that the fatty acids present are converted to their sodium salts.

> Describe the lock-and-key model for enzymes. Why are the shapes of the enzyme and its substrate important in this model? What does it mean to say that an enzyme is inhibited by a particular molecule? What happens if this inhibition is irreversible? Can y

> Vegetable oils tend to contain fatty acids, whereas animal fats tend to be .

> are esters of the polyhydroxyalcohol glycerol with long-chain carboxylic acids.

> Write the amino acid sequences possible for a tripeptide containing the amino acids cys, ala, and phe, with each amino acid being used only once in each tripeptide.

> The codes specified by are responsible for assembling the correct primary structure of proteins.

> During protein synthesis, RNA molecules attach to and transport specific amino acids to the appropriate position on the pattern provided by RNA molecules.

> A given segment of the DNA molecule, which contains the molecular coding for a specific protein to be synthesized, is referred to as a .

> In a strand of normal DNA, the base is always found paired with the base adenine, whereas is always found paired with cytosine.

> The bases on opposite strands of DNA are said to be to each other, which means the bases fit together specifically by hydrogen bonding to one another.

> The basic linkage in DNA or RNA between the sugar molecule and phosphoric acid is a phosphate linkage.

> The pentose deoxyribose is found in DNA, whereas is found in RNA.

> Which of the following formula–name pairs are incorrect? Explain why for each case. a. Ag(NO3)2 silver nitrate b. Fe2Cl ferrous chloride c. NaH2PO4 sodium hydrogen phosphate d. NH4S ammonium sulfide e. KC2H3O2 potassium acetate f. Ca(ClO4)2 calcium

> RNA molecules have molar masses in the range of 20,000 to 40,000 g/mol. How does this molar-mass range compare to the molar mass of DNA?

> The substance in the nucleus of the cell that stores and transmits genetic information is DNA, which stands for .

> For Exercises 55–76 choose one of the following terms to match the description given. a. aldohexose b. antibody c. cellulose d. CH2O e. cysteine f. denaturation g. disaccharides h. disulfide i. DNA j. enzymes k. fibrous l. globular m. glycog

> a. Write the conjugate acid for each of the following Brønsted– Lowry bases. NO3-, HSO4-, ClO4-, NH3, HCO3- b. Write the conjugate base for each of the following Brønsted– Lowry acids. HCl, H2SO4, NH3, NH4+, HCO3-

> For Exercises 55–76 choose one of the following terms to match the description given. a. aldohexose b. antibody c. cellulose d. CH2O e. cysteine f. denaturation g. disaccharides h. disulfide i. DNA j. enzymes k. fibrous l. globular m. glycog

> Describe enzyme catalysis as a series of steps, with E symbolizing the enzyme and S symbolizing the substrate.

> For Exercises 55–76 choose one of the following terms to match the description given. a. aldohexose b. antibody c. cellulose d. CH2O e. cysteine f. denaturation g. disaccharides h. disulfide i. DNA j. enzymes k. fibrous l. globular m. glycog

> Using the ions indicated in Problem 24, write the formulas and give the names for all possible simple ionic compounds involving these ions. From problem 24: a. Mg2+ b. Fe2+ c. Fe3+ d. F- e. Ni2+ f. Zn2+ g. Co3+ h. N3- i. S2- j. Rb+ k. Se2- l.

> For Exercises 55–76 choose one of the following terms to match the description given. a. aldohexose b. antibody c. cellulose d. CH2O e. cysteine f. denaturation g. disaccharides h. disulfide i. DNA j. enzymes k. fibrous l. globular m. glycog

> What are bile acids, and from what are they synthesized by the body? What is the most common bile acid, and what function does it serve?

> Choose 10 species that might be expected to behave as Brønsted–Lowry acids or bases in aqueous solution. For each of your choices, (a) write an equation demonstrating how the species behaves as an acid or base in water, and (b) write the formula of the

> What types of hormones are synthesized in the adrenal glands and are involved in various regulatory functions in the body? Provide an example of this type of hormone.

> What is a steroid? What basic ring structure is common to all steroids? Sketch an example of a steroid found in the body, and highlight the basic ring structure that makes the molecule a steroid.

> Write the electron configuration for the following atoms, using the appropriate noble gas to abbreviate the configuration of the core electrons. a. Sr, Z = 38 b. Al, Z = 13 c. Cl, Z = 17 d. K, Z = 19 e. S, Z = 16 f. As, Z = 33

> Which are the valence electrons in an atom? Choose three elements and write their electron configurations, circling the valence electrons in the configurations. Why are the valence electrons more important to an atom’s chemical properties than are the co

> Chapter 2 introduced the Kelvin and Celsius temperature scales and related them to the Fahrenheit temperature scale commonly used in the United States. a. How is the size of the temperature unit (degree) related between the Kelvin and Celsius scale? b.

> Methane, CH4, is the major component of natural gas. Methane burns in air, releasing approximately 890 kJ of heat energy per mole. CH4(g) + 2O2(g) CO2(g) + 2H2O(g) a. What quantity of heat is released if 0.521 mole of methane is burned?

> Sketch the general structure of a triglyceride. What are the components that go into making up a typical triglyceride?

> What are the four classes of lipids? Give an example of a member of each class.

> Lipids are a group of substances defined in terms of their characteristics.

> What is a gene?

> A traditional analysis for samples containing calcium ion was to precipitate the calcium ion with sodium oxalate (Na2C2O4) solution and then to collect and weigh either the calcium oxalate itself or the calcium oxide produced by heating the oxalate preci

> Write formulas for each of the following compounds. a. mercuric chloride b. iron(III) oxide c. sulfurous acid d. calcium hydride e. potassium nitrate f. aluminum fluoride g. dinitrogen monoxide h. sulfuric acid i. potassium nitride j. nitrogen d

> Name the five nitrogen bases found in DNA and RNA. Which base is found commonly in RNA but not in DNA? Which base is found commonly in DNA but not in RNA?

> DNA nucleotides contain the pentose , whereas RNA nucleotides contain the pentose .

> For each of the following, make the indicated conversion. a. 4,861,903 to standard scientific notation b. 3.8136 * 102 to ordinary decimal notation c. 5.1 * 10-3 to ordinary decimal notation d. 0.000744 to standard scientific notation e. 8.621 * 105

> RNA molecules, which are found in the cytoplasm outside the cell nucleus, are much (smaller/larger) than DNA polymers.

> carries the information needed for the synthesis of the various proteins the cell requires to carry out its life functions.

> In addition to using numerical prefixes in the general names of sugars to indicate how many carbon atoms are present, we often use the prefixes keto- and aldo- to indicate whether the sugar is a ketone or an aldehyde. For example, the monosaccharide fruc

> Sketch a representation of the disaccharide sucrose (table sugar). Label clearly the portion of the disaccharide that originates from glucose, the portion that originates from fructose, and the glycoside linkage between the rings.

> Give the name of each of the following compounds. a. XeO2 b. ICl5 c. PCl3 d. CO e. OF2 f. P2O5 g. AsI3 h. SO3

> What is a disaccharide? What monosaccharide units make up the disaccharide sucrose? What is the bond called that forms between the monosaccharide units?

> What is a hexose sugar? Sketch the straight-chain representation of the hexose galactose.

> Sketch the ring structures of glucose and fructose. Based on the electron pairs surrounding the atoms of the rings, would you expect these rings to be planar (flat)?

> Many of the most important carbohydrates are , which are large molecules constructed by hooking together many smaller molecules.

> Consider the reaction as represented by the following unbalanced chemical equation: 2H2(g) + O2(g) ( 2H2O(g) You react 15.0 g of hydrogen gas with 100.0 g of oxygen gas. Determine the amount of reactant in excess (in grams) after the reaction is comp

> Most people think of science as being a specific, exact discipline, with a “correct” answer for every problem. Yet you were introduced to the concept of uncertainty in scientific measurements. What is meant by “uncertainty”? How does uncertainty creep in

> Calculate the percent by mass of the element whose symbol occurs first in the following compounds’ formulas. a. C6H6(l) b. Na2SO4(s) c. CS2(l) d. AlCl3(s) e. Cu2O(s) f. CuO(s) g. Co2O3(s) h. C6H12O6(s)

> What name is given to the specific portion of the enzyme molecule where catalysis actually occurs?

> Write the formula for each of the following binary ionic compounds. a. copper(I) iodide b. cobaltous chloride c. silver sulfide d. mercurous bromide e. mercuric oxide f. chromium(III) sulfide g. plumbic oxide h. potassium nitride i. stannous fluo

> How does the efficiency of an enzyme compare with that of inorganic catalysts? Are enzymes more or less efficient?

> How are proteins able to act as buffering agents in the blood and tissues?

> What are antibodies? How do they work?

> What is the name of the protein found in all cells that extracts energy from food molecules by transferring electrons in a series of oxidation–reduction reactions??

> What name is given to proteins that catalyze biochemical reactions in the cell?

> What protein is responsible for the transport of oxygen through the bloodstream?

> Which of the following represent physical properties or changes, and which represent chemical properties or changes? a. You curl your hair with a curling iron. b. You curl your hair by getting a “permanent wave” at the hair salon. c. Ice on your sidew

> In Chapter 2 of this text, you were introduced to the International System (SI) of measurements. What are the basic units of this system for mass, distance, time, and temperature? What are some of the prefixes used to indicate common multiples and subdiv

> An S-S bond between two cysteine amino acids on a protein is called a(n) . This bond stabilizes the tertiary structure of many proteins.

> Complete the following table by giving the symbol, name, atomic number, and/or group(family) number as required. Atomic Group Symbol Name Number Number Ca I cesium 16 arsenic Sr 14 Rn radium Se ||

> Silk consists of a(n) structure in which the individual chains of amino acids are lined up lengthwise next to each other.

> Describe the secondary structure of the protein collagen.

> Consider the neutron, the proton, and the electron. a. Which is(are) found in the nucleus? b. Which has the largest relative mass? c. Which has the smallest relative mass? d. Which is negatively charged? e. Which is electrically neutral?

> In general terms, what does the secondary structure of a protein represent?

> What does the primary structure of a protein rep resent? How are the individual units that make up the overall primary structure of a protein held together?

> What is a peptide linkage? Choose two amino acids from Fig. 21.2 and draw structures for the two dipeptides those amino acids are capable of forming, circling the peptide linkage in each. From figure 21.2 Answer: The âpeptide linkage&

> How many unique amino acid sequences are possible for a tripeptide containing only the amino acids gly, ala, and cys, with each amino acid occurring only once in each molecule?

> Given the structures of the amino acids alanine and serine as shown in Fig. 21.2, draw structures for each of the two dipeptides that these amino acids might form. From figure 21.2

> Many college students would not choose to take a chemistry course if it were not required for their major. Do you have a better appreciation of why chemistry is a required course for your own particular major or career choice? Discuss.

> Perhaps the most important concept in introductory chemistry concerns what a mole of a substance represents. The mole concept will come up again and again in later chapters in this book. What does one mole of a substance represent on a microscopic, atomi

> Given the structures of the amino acids in Fig. 21.2, choose two amino acids that you would expect to have hydrophobic side chains and two amino acids that you would expect to have hydrophilic side chains, and explain your choices in terms of the structu

> Nonpolar side chains in a-amino acids tend to be , whereas polar side chains are most often in an aqueous medium.

> The symbols for the elements silver (Ag), gold (Au), and tungsten (W) seem to bear no relation to their English names. Explain and give three additional examples.

> Without consulting any reference, write the name and symbol for as many elements as you can. How many could you name? How many symbols did you write correctly?

> What is an element? Which elements are most abundant on the earth? Which elements are most abundant in the human body?

> What are proteins? Are proteins polymers? Explain. What molar mass ranges are shown by proteins? What fraction of our bodies is made up of proteins?

> What are trace elements, and why are such elements important to the body’s health?

> is the study of the chemistry of living systems.

Question: Which of the following statements is correct

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