Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Question
Chapter 18.2, Problem 3CC
Summary Introduction
To describe:
The role of non-coding RNAs that are not transcribed into mRNA.
Introduction:
The National Human Genome Research Institute launched a public research association named ENCODE, the Encyclopedia of DNA Elements, in September 2003. It is a project to identify all the functional elements in human genome sequence.
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Q.)
A.)Search in human genome if any examples of mRNA translated from 2 different sites?and give examples?
B.)aminoacyl tRNA synthetase is specialized or not ? And why?
Q1. Predict the effects (on translation of coat gene and replicase gene) of the following mutations on phage R17 coat gene and replicase gene translation and explain the logic of your answers:
a. An amber mutation (premature stop codon) six codons downstream of the coat gene initiation codon.
b. Mutations in the stem loop around the coat gene initiation codon that weakens the base-pairing in the stem loop.
c. Mutations in the interior of the replicase gene that cause it to base-pair with the coat gene initiation codon.
MAKE CONNECTIONS Chromosomescontain the genetic material and reside in thenucleus; how does the rest of the cell get accessto the information they carry?
Chapter 18 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 18.1 - Prob. 1CCCh. 18.2 - Prob. 1CCCh. 18.2 - Explain the advantage of the systems biology...Ch. 18.2 - Prob. 3CCCh. 18.3 - The best estimate is that the human genome...Ch. 18.3 - Prob. 2CCCh. 18.3 - Prob. 3CCCh. 18.4 - Discuss the characteristics of mammalian genomes...Ch. 18.4 - Which of the three mechanisms described in Figures...Ch. 18.4 - Prob. 3CC
Ch. 18.5 - Describe three examples of errors in cellular...Ch. 18.5 - Prob. 2CCCh. 18.5 - Prob. 3CCCh. 18.6 - Would you expect the genome of the macaque (a...Ch. 18.6 - Prob. 2CCCh. 18 - Prob. 1TYUCh. 18 - Prob. 2TYUCh. 18 - Two eukaryotic proteins have one domain in common...Ch. 18 - SCIENTIFIC INQUIRY The scientists mapping human...Ch. 18 - FOCUS ON EVOLUTION Genes important in the...Ch. 18 - FOCUS ON INFORMATION The continuity of life is...Ch. 18 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
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- WHAT IF? In eukaryotic cells, mRNAs have been foundto have a circular arrangement in which proteins holdthe poly-A tail near the 5¿ cap. How might this increasetranslation efficiency?arrow_forwardQ1: In your own words, define RNA splicing. When during gene expression does it occur? Q2: What do you predict would happen if the introns were not removed from RNA before translation? Why would it be a problem if the introns were not removed? Q3: Where is the mRNA destined to go once it has been transported out of the nucleus?arrow_forwardConsider this short mRNA: 5’ – AUGGCAGUGCAA – 3’. Answer the following questions assuming the code is non-overlapping. How many codons are represented in this oligonucleotide? If the second G were changed to a C, what would be the resulting amino acid?arrow_forward
- VISUALIZE Sketch a simple flow diagram that shows the relationships among the following: RNA, translation, DNA, transcription, and polypeptide.arrow_forwardWHAT IF? Suppose the mRNA being degraded in Figure18.14 coded for a protein that promotes cell division ina multicellular organism. What would happen if a mutation disabled the gene for the miRNA that triggers thisdegradation?arrow_forwardQ. Write down the importance of post transcriptional modifications? Write in 5 to 6 points with least plagirism in ur own wordsarrow_forward
- Q10. Does frame +2 have an ORF in the coding region of this exon? What about frame +1 and frame +3? Q11. Given that 3 of the 64 possible codons are stop codons, what is the chance of having a stop codon at any given position, assuming that the sequence is random?arrow_forwardMAKE CONNECTIONS Inactivation of one of the Xchromosomes in female mammals involves lncRNA calledXIST RNA, mentioned in this section and in Concept 15.2.Describe transcription and binding of XIST RNA, thensuggest a model for how it initiates Barr body formation.arrow_forwardQ11. Ribosomes are “ribonucleoprotein particles” in that they are composed mostly of rRNA with some associated ribosomal proteins. How are the genes coding for ribosomal RNAs the same as the genes coding for ribosomal proteins? They both have a transcriptional start site. They both have similar open reading frames to facilitate binding. They both have a transcriptional terminator. They both suffer frameshift mutations with the insertion of 2 nucleotides. A. 1, 2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1, 2, 3 and 4 are correctarrow_forward
- Q4. If you imagine a messenger RNA molecule in the cytoplasm of a cell, which of the following will likely affect how much protein is made by translation of this message? A. The presence of appropriate snRNPs. B. The length of the polyA tail. C. The strength of hydrogen bonds holding the mRNA to ribosomal RNA. D. The ability of the mRNA to pair with itself to form a helix-turn-helix structure.arrow_forwardHelp pls !! You are looking at a region of the genome that codes for a gene involved in enamel syntheiss. You do not have a transcripome (RNA sequence). Outline a protocol for deducing the ORF and the protein sequence.arrow_forwardHELP PLEASE !! You are looking at a region of the genome that codes for a gene involved in enamel syntheiss. You do not have a transcripome (RNA sequence). Outline a protocol for deducing the ORF and the protein sequence.arrow_forward
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