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BIO 100--Quiz 3

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
T or F Carbon, hydrogen, oxygen, and nitrogen make up more than 90% of living matter.   show
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T or F The trace element iodine is required only in very small quantities by vertebrates.   show
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show False  
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T or F Iron is an example of an element needed by all organisms.   show
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T or F Phosphorus is required in sufficient, but not huge, quantities   show
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Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms. Which of the following indicates the number of protons in an atom's nucleus?   show
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The atomic number of carbon is 6. Carbon-14 is heavier than carbon-12 because the atomic nucleus of carbon-14 contains _____ neutrons.   show
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show outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms.  
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show Correct  
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Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in ammonia (NH3)? The nitrogen atom has a strong positive charge.   show
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show False  
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show False  
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show False  
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What results from an unequal sharing of electrons between atoms?   show
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Which of the following results from a transfer of electron(s) between atoms? nonpolar covalent bond polar covalent bond ionic bond hydrogen bond hydrophobic interaction   show
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Which of the following describes the attractive force between different water molecules to each other MOST specifically? nonpolar covalent bond polar covalent bond ionic bond hydrogen bond hydrophobic interaction   show
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Van der Waals interactions result when...   show
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show A water strider can walk across the surface of a small pond.  
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show absorption and release of heat when hydrogen bonds break and form.  
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show Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water  
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Which of the following is NOT a polymer? glucose starch cellulose chitin DNA   show
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show dehydration reactions  
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show the release of a water molecule.  
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There are 20 different amino acids. What makes one amino acid different from another?   show
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show are mirror images of one another.  
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show carboxyl and amino  
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