Textbook Question
Assuming that each nucleotide in an mRNA is 0.34 nm long, how many triplet codes can simultaneously occupy the space in a ribosome that is 20 nm in diameter?
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Ch. 13 - Translation and Proteins
Klug10th EditionEssentials of GeneticsISBN: 9780135588789
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Table of contents
- Ch. 1 - Introduction to Genetics16
- Ch. 2 - Mitosis and Meiosis28
- Ch. 3 - Mendelian Genetics37
- Ch. 4 - Modification of Mendelian Ratios53
- Ch. 5 - Sex Determination and Sex Chromosomes32
- Ch. 6 - Chromosome Mutations: Variation in Number and Arrangement37
- Ch. 7 - Linkage and Chromosome Mapping in Eukaryotes36
- Ch. 8 - Genetic Analysis and Mapping in Bacteria and Bacteriophages24
- Ch. 9 - DNA Structure and Analysis38
- Ch. 10 - DNA Replication29
- Ch. 11 - Chromosome Structure and DNA Sequence Organization22
- Ch. 12 - The Genetic Code and Transcription36
- Ch. 13 - Translation and Proteins27
- Ch. 14 - Gene Mutation, DNA Repair, and Transposition34
- Ch. 15 - Regulation of Gene Expression in Bacteria22
- Ch. 16 - Regulation of Gene Expression in Eukaryotes37
- Ch. 17 - Recombinant DNA Technology27
- Ch. 18 - Genomics, Bioinformatics, and Proteomics30
- Ch. 19 - The Genetics of Cancer21
- Ch. 20 - Quantitative Genetics and Multifactorial Traits37
- Ch. 21 - Population and Evolutionary Genetics45
Chapter 13, Problem 17
List as many different categories of protein functions as you can. Wherever possible, give an example of each category.
Verified step by step guidance1
Understand that proteins perform a wide variety of functions in biological systems, and these functions can be grouped into distinct categories based on their roles.
Identify the category of 'Enzymatic proteins' which act as catalysts to speed up biochemical reactions. For example, amylase breaks down starch into sugars.
Consider 'Structural proteins' that provide support and shape to cells and tissues. An example is collagen, which strengthens connective tissues.
Look at 'Transport proteins' that carry molecules across cell membranes or through the bloodstream. Hemoglobin, which transports oxygen in blood, is a classic example.
Include 'Signaling proteins' involved in communication within and between cells, such as insulin, which regulates blood sugar levels.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Enzymatic Function
Proteins that act as enzymes catalyze biochemical reactions, increasing reaction rates without being consumed. For example, amylase breaks down starch into sugars during digestion.
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Structural Function
Structural proteins provide support and shape to cells and tissues. Collagen, found in connective tissues, is a key example that gives strength and elasticity to skin and bones.
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Transport and Storage Function
Some proteins transport molecules across membranes or store essential substances. Hemoglobin transports oxygen in the blood, while ferritin stores iron within cells.
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Related Practice
Textbook Question
How does an enzyme function? Why are enzymes essential for living organisms on Earth?
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Textbook Question
Several amino acid substitutions in the α and β chains of human hemoglobin are shown in the following table.
Using the code table, determine how many of them can occur as a result of a single-nucleotide change.
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Textbook Question
Three independently assorting genes (A, B, and C) are known to control the following biochemical pathway that provides the basis for flower color in a hypothetical plant:
Three homozygous recessive mutations are also known, each of which interrupts a different one of these steps. Determine the phenotypic results in the F1 and F2 generations resulting from the P1 crosses of true-breeding plants listed here:
speckled (AABBCC) × yellow (AAbbCC)
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