etx30 exam 1

etx30 exam 1 - ETX 30 1. FIRST EXAM JANUARY 29, 2008 Which...

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ETX 30 FIRST EXAM JANUARY 29, 2008 1 1. Which one of the following is made up of two or more atoms? A. molecules B. isotopes C. deuterium 2. Chemical bonds involve the sharing of which one of the following? A. protons B. electrons C. neutrons D. none of the above 3. Chose the answer that ranks the listed reactions in the order of increasing energy required for the reaction to occur. A. N 2 + 3H 2 Æ 2NH 3 < 2H 2 + O 2 Æ 2H 2 O < 2H 2 O Æ 2H 2 + 0 2 B. 2H 2 + O 2 Æ H 2 O < 3H 2 + N 2 Æ 2NH 3 < 2H 2 O Æ 2H 2 + 0 2 C. N 2 + 3H 2 Æ 2NH 3 < 2H 2 O Æ 2H 2 + 0 2 < 2H 2 + O 2 Æ 2H 2 O 4. Which one of the following is the best description of the properties of oxygen? A. makes up 21 % of the atmosphere B. oxidizes almost all elements C. the most abundant atom on the earth’s surface D. all of the above 5. Nitrogen makes up 78 % of the atmosphere and is also essential to all living organisms. Which one of the following processes best explains how atmospheric nitrogen is made available to living organisms. A. methylation B. fixation by bacteria C. incorporation into limestone D. inhalation 6. Chose the most appropriate list of chemicals to fill in the blanks in the order they should appear below. Combustion of organic matter produces ______ and _______. ________ is further oxidized in the atmosphere to _______. ________ is the major green house (global warming) gas resulting from the combustion of organic matter. A. carbon dioxide, carbon monoxide, carbon monoxide, carbon dioxide, carbon dioxide B. carbon monoxide, carbon dioxide, carbon monoxide, carbon dioxide, carbon monoxide C. carbon monoxide, carbon dioxide, carbon dioxide, carbon monoxide, carbon dioxide D. carbon dioxide,carbon monoxide, carbon monoxide, carbon dioxide, carbon monoxide 7. Which one of the following best ranks the occurance of elements in rock, soil and sediment: A. sodium (Na), magnesium (Mg), potassium (K) > aluminum (Al), iron (Fe), calcium (Ca) > oxygen (O), silicon (Si) B. aluminum (Al), iron (Fe), calcium (Ca) > oxygen (O), silicon (Si) > sodium (Na), magnesium (Mg), potassium (K) C. oxygen (O), silicon (Si) > aluminum (Al), iron (Fe), calcium (Ca) > sodium (Na), magnesium (Mg), potassium (K) 8. Which one of the following elements is most abundant in organic matter: A. silicon B. phosphorus C. sulfur D. carbon
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ETX 30 FIRST EXAM JANUARY 29, 2008 9. True or False? The central dogma explains how information in the sequence of amino acids in protein is transcribed into the sequence of nucleotides in RNA and then translated into the sequence of deoxynucleotides in DNA in the cytoplasm. A. true B. false 10. Reading from the chart below, which one of the following codons will code for the amino acid lysine (lys)? A.
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This note was uploaded on 01/06/2011 for the course ETX 130A taught by Professor Matthewwood during the Spring '10 term at UC Davis.

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etx30 exam 1 - ETX 30 1. FIRST EXAM JANUARY 29, 2008 Which...

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