Domanda del libro di testo
The best definition of ATP is that it is
a. A molecule stored for food use.
b. A molecule that supplies energy to do work.
c. A molecule stored for an energy reserve.
d. A molecule used as a source of phosphate.
1941
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Ch. 2 - Chemical Principles
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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TOC.tableOfContents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 7 - The Control of Microbial Growth20
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
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Capitolo 2, Problema 6
Which of the following is an organic molecule?
a. H2O (water)
b. O2 (oxygen)
c. C18H29SO3
d. FeO (iron oxide)
e. F2C=CF2 (Teflon)
Guida verificata passo dopo passo1
Understand the definition of an organic molecule: Organic molecules primarily contain carbon atoms bonded to hydrogen atoms, often along with other elements such as oxygen, nitrogen, sulfur, and phosphorus. The presence of carbon-hydrogen (C-H) bonds is a key characteristic.
Examine each option to identify the presence of carbon and hydrogen atoms:
- a. H₂O (water) contains hydrogen and oxygen but no carbon.
- b. O₂ (oxygen) contains only oxygen atoms.
- c. C₁₈H₂₉SO₃ contains carbon, hydrogen, sulfur, and oxygen.
- d. FeO (iron oxide) contains iron and oxygen, no carbon or hydrogen.
- e. F₂C=CF₂ (Teflon) contains carbon and fluorine but no hydrogen.
Determine which molecules have carbon-hydrogen bonds:
- Option c has both carbon and hydrogen atoms, indicating it is an organic molecule.
- Option e has carbon but no hydrogen, so it is considered an organofluorine compound but not a typical organic molecule with C-H bonds.
Conclude that the molecule with carbon-hydrogen bonds (option c) fits the definition of an organic molecule.
Summarize that identifying organic molecules involves checking for carbon atoms bonded to hydrogen atoms, which is the key criterion to distinguish organic from inorganic molecules.
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Definition of Organic Molecules
Organic molecules primarily contain carbon atoms bonded to hydrogen, often along with oxygen, nitrogen, sulfur, or other elements. They form the basis of life and include compounds like carbohydrates, lipids, proteins, and nucleic acids. The presence of carbon-hydrogen (C-H) bonds is a key indicator of organic molecules.
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05:22
Scientific Naming of Organisms
Inorganic Molecules
Inorganic molecules generally lack carbon-hydrogen bonds and include substances like water (H₂O), oxygen gas (O₂), and metal oxides (e.g., FeO). These molecules are often simpler and do not form the complex structures typical of organic compounds.
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02:58Adhesion Molecules
Chemical Formula Interpretation
Understanding chemical formulas helps identify molecular composition. For example, C₁₈H₂₉SO₃ contains carbon and hydrogen, indicating an organic molecule, while formulas like FeO or O₂ lack carbon-hydrogen bonds. Recognizing elements and their bonding patterns is essential for classifying molecules.
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06:53Introduction to Chemical Bonding
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The artificial sweetener aspartame, or NutraSweet®, is made by joining aspartic acid to methylated phenylalanine, as shown in the following.
a. What types of molecules are aspartic acid and phenylalanine?
b. What direction is the hydrolysis reaction (left to right or right to left)?
c. What direction is the dehydration synthesis reaction?
d. Circle the atoms involved in the formation of water.
e. Identify the peptide bond.
1383
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Domanda del libro di testo
Classify the following as subunits of either a carbohydrate, lipid, protein, or nucleic acid.
a. <IMAGE>
b. <IMAGE>
c. <IMAGE>
d. Thymine nucleotide
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Classify each of the molecules on the left as an acid, base, or salt. The dissociation products of the molecules are shown to help you.
HNO3 → H+ + NO⁻3
a. Acid
b. Base
c. Salt
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Bacteria use the enzyme urease to obtain nitrogen in a form they can use from urea in the following reaction:
What purpose does the enzyme serve in this reaction? What type of reaction is this?
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