Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 14.3, Problem 1CC
Given that there are about 20,000 human genes, how can human cells make 75,000-100,000 different proteins?
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Chapter 14 Solutions
Campbell Biology in Focus
Ch. 14.1 - MAKE CONNECTIONS In a research article about...Ch. 14.1 - What polypeptide product would you expect from a...Ch. 14.1 - DRAW IT The template strand of a gene contains the...Ch. 14.2 - What is a promoter? Is it located at the upstream...Ch. 14.2 - What enables RNA polymerase to start transcribing...Ch. 14.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 14.3 - Given that there are about 20,000 human genes, how...Ch. 14.3 - How is RNA splicing similar to how you would watch...Ch. 14.3 - WHAT IF? What would be the effect of treating...Ch. 14.4 - What two processes ensure that the correct amino...
Ch. 14.4 - Discuss the ways in which rRNA structure likely...Ch. 14.4 - Describe how a polypeptide to be secreted is...Ch. 14.4 - WHAT IF? DRAW IT Draw a tRNA with the anticodon...Ch. 14.5 - What happens when one nucleotide pair is lost from...Ch. 14.5 - Prob. 2CCCh. 14.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 14 - In eukaryotic cells, transcription cannot begin...Ch. 14 - Prob. 2TYUCh. 14 - The anticodon of a particular tRNA molecule is A....Ch. 14 - Prob. 4TYUCh. 14 - Which component is not directly involved in...Ch. 14 - Prob. 6TYUCh. 14 - Prob. 7TYUCh. 14 - Prob. 8TYUCh. 14 - Prob. 9TYUCh. 14 - SCIENTIFIC INQUIRY Knowing that the genetic code...Ch. 14 - Prob. 11TYUCh. 14 - FOCUS ON INFORMATION Evolution accounts for the...Ch. 14 - SYNTHESIZE YOUR KNOWLEDGE Some mutations result in...
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- How many nucleotides does the human genome contain?arrow_forwardHow many kilobases of the DNA strand below will code for the protein product?arrow_forwardConsider a portion of a gene in a cell with the sequence TTTTT. Which of the following bases would you find in the complementary RNA strand, and where in the (eukaryotic) cell would this RNA be synthesized? A) A-A-A-A-A; ribosome B) U-U-U-U-U; ribosome C) A-A-A-A-A; nucleus D) U-U-U-U-U; nucleusarrow_forward
- If a bacterial protein is 3,300 amino acids long, how many nucleotidepairs long is the gene sequence that codes for it?arrow_forwardIf you know that the number of nitrogenous bases in DNA = 4 and the number of amino acids = 20, then the number of possible genetic codes for these acids? choose the correct answer . A)20 В)24 С)60 D)64arrow_forwardHow many different proteins, each with a unique amino acid sequence, can be constructed that have a length of five amino acids?arrow_forward
- If an average amino acid is 110Da, how many amino acids would you predict to have in a polypeptide that is 65,000 Daltons in size? How many nucleotides would this be if you were looking for the gene size?arrow_forwardWhy do you think all organisms use nucleic acids for encoding genetic information? Why not use proteins or carbohydrates? What advantages might DNA have as the source of genetic information?arrow_forwardXeroderma pimentos is an inherited disorder characterized by rapid formation of many skin sores that develop into cancers. All forms of radiation trigger these symptoms, including fluorescent light, which contains UV light in the range of 320 to 400 nm. In most affected individuals, at least one of nine particular proteins is missing or defective. What is the collective function of these proteins?arrow_forward
- If the GC content of a DNA molecule is 48%, what are the percentages of the 4 bases A, T, C, and G- in this molecule? O A= 24%, C = 26%, G = 26%, T = 24% O A= 24%, C = 24%, G = 26%, T = 26% O A = 26%, C = 24%, G = 24%, T = 26% O A= 52%, C = 48%, G = 48%, T = 52% O A= 52%, C = 48%, G = 52%, T = 48%arrow_forwardHow can we get multiple proteins from one genetic sequence (one gene many polypeptide)?arrow_forwardXeroderma pigmentosum is an inherited disorder characterized by rapid formation of many skin sores that develop into cancers. All forms of radiation trigger these symptoms, including fluorescent light, which contains UV light in the range of 320 to 400 nm. In most affected individuals, at least one of nine particular proteins is missing or defective. What is the collective function of these proteins?arrow_forward
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