Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 17.3, Problem 3CC
Summary Introduction
To determine: The effect on the cells that are treated with an agent which caused the removal of cap from messenger RNAs (mRNAs).
Concept introduction:
After transcription, pre-mRNA is synthesized and further modified before translation in the cytoplasm. This is called the RNA processing and it includes the modification of mRNA ends and RNA splicing. A modified guanine (7-methyl guanine) group is added to the 5′ end of the mRNA chain with the help of the capping enzymes. This is known as the 5′ cap. At the 3′ end of the eukaryotic mRNA chain, adenine groups (poly-A tail) are added by poly (A) polymerase enzyme. This is known as the polyadenylation.
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Chapter 17 Solutions
Campbell Biology (11th Edition)
Ch. 17.1 - Prob. 1CCCh. 17.1 - What polypeptide product would you expect from a...Ch. 17.1 - Prob. 3CCCh. 17.2 - MAKE CONNECTIONS In a research artide about...Ch. 17.2 - What enables RNA polymerase to start transcribing...Ch. 17.2 - WHAT IF? Suppose X-rays caused a sequence change...Ch. 17.3 - There are about 20,000 human protein-coding genes....Ch. 17.3 - How is RNA splicing similar to how you would watch...Ch. 17.3 - Prob. 3CCCh. 17.4 - What two processes ensure that the correct amino...
Ch. 17.4 - Prob. 2CCCh. 17.4 - Prob. 3CCCh. 17.4 - WH AT IF? In eukaryotic cells, mRNAs have been...Ch. 17.5 - What happens when one nucleotide pair is lost from...Ch. 17.5 - MAKE CONNECTIONS Individuals heterozygous for the...Ch. 17.5 - WHAT IF? DRAW IT The template strand of a gene...Ch. 17 - Describe the process of gene expression, by which...Ch. 17 - What are the similarities and differences in the...Ch. 17 - What function do the 5' cap and the poly-A tail...Ch. 17 - Prob. 17.4CRCh. 17 - What will be the results of chemically modifying...Ch. 17 - In eukaryotic cells, transcription cannot begin...Ch. 17 - Which of the following is not true of a codon? (A)...Ch. 17 - The anticodon of a particular tRNA molecule is (A)...Ch. 17 - Which of the following is not true of RNA...Ch. 17 - Which component is not directly involved in...Ch. 17 - Using Figure 17.6, identify a 5' 3' sequence of...Ch. 17 - Prob. 7TYUCh. 17 - Would the coupling of the processes shown in...Ch. 17 - Prob. 9TYUCh. 17 - Prob. 10TYUCh. 17 - scientific inquiry Knowing that the genetic code...Ch. 17 - Prob. 12TYUCh. 17 - Prob. 13TYU
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- WHAT IF? Imagine a protein that functions in the ERbut requires modification in the Golgi apparatus beforeit can achieve that function. Describe the protein’s paththrough the cell, starting with the mRNA molecule thatspecifies the protein.arrow_forwardDiscuss Concepts Why do you suppose cells evolved internal response mechanisms using molecules that bind GTP instead of ATP?arrow_forwardWHAT IF? A certain mutation in E. coli changes the lacoperator so that the active repressor cannot bind. Howwould this affect the cell’s production of β-galactosidase?arrow_forward
- Q. Describe the different methods the cells use to restrict proteins to specific regions of the plasma membranearrow_forwardWHAT IF? In Figure 18.17b, the lower cell is synthesizingsignaling molecules, whereas the upper cell is expressingreceptors for these molecules. In terms of gene regulationand cytoplasmic determinants, explain how these cellscame to synthesize different molecules.arrow_forwardWhat is a KDEL motif? A The KDEL motif functions as a stop-transfer sequence in Type I membrane proteins. B The KDEL motif is a four amino acid sequence (Lysine-Aspartic acid-Glutamic acid-Leucine) that functions as an ER retention signal to keep proteins localized to the ER. C The KDEL motif is a sequence of four amino acids that targets proteins to the nucleus. D The KDEL motif is a sequence of four amino acids with positive charges that functions to bind RNA.arrow_forward
- Compare the auto induction media (AIM) with regular induced protein expression. Which is better when conducting experiments?arrow_forwardQ. Write down the importance of post transcriptional modifications? Write in 5 to 6 points with least plagirism in ur own wordsarrow_forwardMicrob an mRNA molecule has the sequence 5'UCA GAA AUG CAC3. Which of the following best describes the tRNA that binds to the third/3rd codon of this mRNA? has anticodon AUG and the amino acid tyrosine It can have any anticodon and any amino acid Has the anticodon UAC and the amino acid methionine Has the anticodon CUU and the amino acid glutamic acid must have the anticodon TAC Has anticodon UUC and the amino acid lysinearrow_forward
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