Domanda del libro di testo
If you hold a salty cracker in your mouth long enough, it will begin to taste sweet. What is responsible for this change in taste?
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Ch. 5 - An Introduction to Carbohydrates
Freeman8th EditionBiological ScienceISBN: 9780138276263
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TOC.tableOfContents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Capitolo 5, Problema 9
Galactosemia is a potentially fatal disease that occurs in humans who lack the enzyme that converts galactose to glucose. If you were a physician treating a person with this disease, which of the following would you have them exclude from their diet?
a. Maltose
b. Starch
c. Mannose
d. Lactose
Guida verificata passo dopo passo1
Understand the condition: Galactosemia is a genetic disorder where the body cannot convert galactose into glucose due to the absence of the enzyme galactose-1-phosphate uridylyltransferase.
Identify the source of galactose: Galactose is a monosaccharide that is commonly found in lactose, which is a disaccharide composed of glucose and galactose.
Analyze the dietary options: Evaluate each option to determine if it contains galactose. Maltose is composed of two glucose molecules, starch is a polysaccharide made of glucose units, mannose is a different monosaccharide, and lactose contains galactose.
Determine the exclusion: Since lactose contains galactose, it should be excluded from the diet of a person with galactosemia to prevent the accumulation of galactose in the body.
Provide dietary advice: Recommend alternative sources of carbohydrates that do not contain galactose, such as those derived from maltose or starch, to ensure the patient receives adequate nutrition without risking their health.
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Galactosemia
Galactosemia is a genetic disorder where the body is unable to convert galactose into glucose due to the absence or malfunction of the enzyme galactose-1-phosphate uridylyltransferase. This leads to the accumulation of galactose in the blood, which can cause serious health issues such as liver damage, intellectual disability, and even death if not managed properly.
Enzyme Function
Enzymes are biological catalysts that speed up chemical reactions in the body. In the context of galactosemia, the enzyme galactose-1-phosphate uridylyltransferase is crucial for converting galactose into glucose. Without this enzyme, galactose accumulates, leading to toxic effects. Understanding enzyme function is essential for diagnosing and treating metabolic disorders like galactosemia.
Video consigliato:
02:32
Functions of Enzymes
Dietary Sources of Galactose
Galactose is a sugar found in lactose, which is present in milk and dairy products. For individuals with galactosemia, it is critical to avoid foods containing lactose to prevent the accumulation of galactose. Physicians must advise patients to exclude lactose from their diet, as it directly contributes to the galactose levels in the body, exacerbating the condition.
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Percorso guidato
02:16Sources of Genetic Variation
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