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Body Temperature Change while Sweating

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    The reactivity of an atom arises from Answer – b – the existence of unpaired electrons in the valence shell. 8) Which of these statements is true of all anionic atoms? Answer – a – the atom has more electrons than protons. ) What coefficients must be placed in the blanks so that all atoms are accounted for n the produce C6H1206 CACHE + CO Answer – b – 2;2 10) Which of the following statements correctly describes any chemical reaction that has equilibrium? Answer – b – the rate of the forward reaction equals the rate of the reverse reaction. CHAPTER 3 1) What is the best explanation of the phrase “fitness of the environment”, as use I this chapter? Answer – d – Life as we know it depends on certain environmental qualities on earth. 2) Many mammals control their body temperature by sweating.

    Which property of water is most directly responsible for the ability to sweat to lower body temperature? Answer – d – the absorption of heat by the breaking of hydrogen bonds. 3) For two bodies of matter in contact, heat always flows from: Answer – b – the body of higher temperature to the one of lower temperature. 4) A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what would be the approximate increase in the temperature of the water? Answer – c – 10 degrees Celsius. ) The bonds that are broken when water vaporizes are Answer – b – bonds between water molecules. 6) Which of the following is an example of a hydrophobic material? Answer – c – wax 7) We can be sure that a mole of table sugar and a mole of vitamin C are in equal in their: Answer – c – number of molecules. 8) How many grams tot acetic acid (C aqueous solution of acetic acid? Answer – d – 60. 0 grams 2) would you use to make 1 9) Acid precipitation has lowered the pH of a particular lake to 4. 0. What is the hydrogen ion concentration of the lake?

    Answer – c- 10-MM. 10) What is the hydroxide concentration of the lake described in question 9? Answer – c- 10-MM CHAPTER 4 1) Organic chemistry is currently defined as Answer – b – the study of carbon compounds. ) Choose the pair of terms that correctly completes this sentence: Hydroxyl is to is to alluded Answer – c – alcohol, carbonyl. 3) Which of the following hydrocarbons has a double bond in its carbon skeleton? Answer – d – CHI 4) The gasoline consumed by an automobile is a fossil fuel consisting mostly of Answer – d – hydrocarbons. ) Choose the term that correctly describes the relationship between these two sugar molecules: Answer – a – structural isomers. 6) Identify the asymmetric carbon in this molecule: 7) Which functional group is not present in this molecule? Answer – – sultrily; 8) Which action could produce a carbonyl group? Answer – a – the replacement of the hydroxyl of a carbonyl group with hydrogen. 9) Which functional group is most likely to be responsible for an organic molecule behaving as base?

    Answer – d – amino. 10) Given what you know about the electro negativity of oxygen, predict which of the following molecules would be the strongest acid. Explain your answer. The molecule in choice b would be the strongest acid because the oxygen bonded to carbon in choice b, the carbonyl group as opposed to two hydrogen atoms bonded to carbon in choice a would make the covalent bond between oxygen more polar and therefore would give the molecule more acidic properties than the molecule shown in choice a.

    CHAPTER 5 1) Which term includes all others in the list? Answer – d – carbohydrate 2) The molecular formula for glucose is C6H1206. What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration reactions? Answer – d – C60H111051 3) The enzyme amylase can break glycoside linkages between glucose monomers only if the monomers are the a form. Which of the following could amylase break down? Answer – c,d,e – glycogen, starch and amplification. ) Choose the pair of terms that correctly completes this sentence: Nucleotides are to are to protons. Answer – c – glycoside linkages; polypeptide linkages. 5) Which of the following statements concerning unsaturated fats are true? B – They nave double bonds in the carbon chains tot their tatty acids. 6) The structural level of a protein least affected by a disruption in hydrogen bonding is the Answer – d – quaternary level. 7) Which of the following pairs of base sequences could form a short stretch of a aroma double helix of DNA?

    Answer – d – 5′-A-T-G-C-3′ with 5′-G-C-A-T-3′ 8) Enzymes that break down DNA catalysts hydrolysis of the covalent bonds that Join nucleotides together. What would happen to DNA molecules treated with these enzymes? Answer -b – The phosphoresce bonds between didgeridoos sugars would be broken. 9) Which of the following is not a protein? Answer – b – cholesterol. 10) Which of the following statements about the 5′ end of a polypeptide strand is correct? Answer – b – the 5′ end has a phosphate group.

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