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24 Cards in this Set
- Front
- Back
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Which of the following forms of energy are in use during vision?
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Chemical Energy.
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All of the following are examples the four major elements contributing to body mass except:
A) Hydrogen B) Carbon C) Nitrogen D) Sodium E) Oxygen |
D. Sodium
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The mass # of an atom is:
A) Equal to the # of protons B) Sum of protons and neutrons C) Sum of all subatomic particles D) Average of the mass #s of all its isotopes |
B. Sum of protons and neutrons
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A deficiency in this element can be expected to reduce the hemoglobin content of blood:
A) Fe B) I C) F D) Ca E) K |
A. Fe (Iron)
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Which set of terms best describes a proton?
A) Neg. charge, massless, in the orbital B) Pos. charge, 1 amu, in the nucleus C) Uncharged, 1 amu, in the nuclleus |
B. Pos. charge, 1 amu, in the nucleus
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The subatomic particles responsible for the chemical behavior of atoms are:
A) Electrons B) Ions C) Neutrons D) Protons |
A. Electrons
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In the body, carbs are stored in the form of:
A) Glycogen B) Starch C) Cholesterol D) Polypeptides |
A. Glycogen
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Which of the following does NOT describe a mixture?
A) Properties of its components are retained B) Chemical bonds are formed C) Components can be separated physically D) Includes both hetergeneous and heterozygous examples |
B. Chemical bonds are formed
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In a beaker of water, the water-water bonds can properly be called:
A) Ionic Bonds B) Polar Covalent Bonds C) Non-Polar Covalent Bonds D) Hydrogen Bonds |
D. Hydrogen Bonds
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When a pair of electrons is shared between two atoms, the bond formed is called:
A) Single Covalent Bond B) Double Covalent Bond C) Triple Covalent Bond D) Ionic Bond |
A. Single Covalent Bond
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Molecule formed when shared unequally are:
A) Salts B) Polar Molecules C) Non-Polar Molecules |
B. Polar Molecules
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Which of the following covalently bonded molecules are polar?
A) H - Cl H I B) H - C - H I H H I C) Cl - C - Cl I Cl D) N-=N |
A. H - Cl
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Identify each reaction as (a) synthesis reaction, (b) decompositon reaction or (c) an exchange reaction.
1) 2Hg + O2 --> 2HgO 2) HCl + NaOH --> NaCl + H2O |
1) Synthesis Reaction
2) Exchange Reaction. |
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Factors that accelerate the rate of chemical reactions include all but:
A) Prescence of Catalysts B) Increasing the temperature C) Increasing the particle size D) Increasing the concentration of the reactants |
C. Increasing the particle size
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Which of the following molecules is an inorganic molecule?
A) Sucrose B) Cholesterol C) Collagen D) Sodium Chloride |
D. Sodium Chloride
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Water's importance to living systems reflect:
A) Its polarity and solvent properties B) Its high heat capacity C) Its high heat of vaporization D) Its chemical activity E) All of these |
E. All of the above
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Acids:
A) Release hydroxyl ions when dissolved in water B) Are proton acceptors C) Cause the pH of a solution to rise D) Release protons when dissolved in water |
D. Release protons when dissolved in water
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A chemist, during the course of an analysis, runs across a chemical composed of carbon, hydrogen and oxygen in the proportion of 1:2:1 and having a six-sided molecular shape. It probably is:
A) A Pentose B) An Amino Acid C) A Fatty Acid D) A Monosaccharide E) A Nucleic Acid |
D. A Monosaccharide
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A triglyceride consists of:
A) Glycerol plus up to 3 fatty acids B) A Sugar-phosphate backobone to which two amino groups are attached C) Two to several hexoses D) Amino acids that have been thoroughly saturated with hydrogen |
A. Glycerol plus up to 3 fatty acids
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A chemical has an amine group and an organic acid group. It does not, however, have any peptide bonds. It is a
A) Monosaccharide B) Amino Acid C) Protein D) Fat |
B. Amino Acid
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The lipid(s) used as the basis of vitamin D, sex hormones, and bile salts is/are:
A) Triglycerides B) Cholesterol C) Phospholipids D) Prostaglandin |
B. Cholesterol
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Enzymes are organic catalysts that:
A) Alter the direction in which a chemical reaction proceeds B) Determine the nature of the products of a reaction C) Increase the speed of a chemical reaction D) Are essential raw materials for a chemical reaction that are converted into some of its products |
C. Increase the speed of a chemical reaction
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The lipid(s) used as the basis of vitamin D, sex hormones, and bile salts is/are:
A) Triglycerides B) Cholesterol C) Phospholipids D) Prostaglandin |
B. Cholesterol
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Enzymes are organic catalysts that:
A) Alter the direction in which a chemical reaction proceeds B) Determine the nature of the products of a reaction C) Increase the speed of a chemical reaction D) Are essential raw materials for a chemical reaction that are converted into some of its products |
C. Increase the speed of a chemical reaction
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