BIOL 308: BIOL-MSTBIO NEW DSGN ACCESS
18th Edition
ISBN: 9781323838877
Author: Campbell
Publisher: Pearson Custom Publishing
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Chapter 17.4, Problem 4CC
WH AT IF? → In eukaryotic cells, mRNAs have been found to have a circular arrangement in which proteins hold the poly-A tail near the 5' cap. How might this increase translation efficiency?
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WHAT IF? DRAW IT The template strand of a geneincludes this sequence:3¿-TACTTGTCCGATATC-5¿. It is mutated to3¿-TACTTGTCCAATATC-5¿. For both wild-type and mutantsequences, draw the double-stranded DNA, the resultingmRNA, and the amino acid sequence each encodes. Whatis the effect of the mutation on the amino acid sequence?
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Chapter 17 Solutions
BIOL 308: BIOL-MSTBIO NEW DSGN ACCESS
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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- VISUALIZE Sketch a pyrimidine nucleotide subunit that would be found only in RNA. Circle and label the three components that make up this type of nucleotide. Explain what changes in the functional groups of this subunit would have to occur for it to be found in a DNA molecule.arrow_forward3a) In a hypothetical cell where "wobble" pairing was not allowed (i.e. every codon must be matched by a tRNA anticodon that is its perfect complement), how many tRNAs would be required to service all of the threonine codons?arrow_forwardWHAT IF? DRAW IT Draw a tRNA with the anticodon3¿-CGU-5¿. What two different codons could it bind to?Draw each codon on an mRNA, labeling all 5¿ and 3¿ends, the tRNA, and the amino acid it carries.arrow_forward
- Give typed full explanation Given the following sequence of RNA, propose the potential hairpin structure for this RNA. Indicate base pairing with a dotted line. 5’ -AGGACCCUUCGGGGUUCU-3’arrow_forwardmRNA: 5’ – UGAUCAUGAUCUCGUAAGAUAUC – 3’ -Draw a box around the sequence where protein synthesis will begin. What is this sequence called? Does an amino acid get inserted at this site? If so, which one? -Draw in an arrow to show the direction that a ribosome will move along the mRNA strand. -From the starting point, mark off the codons, and identify the correct amino acid that will be inserted at that codon. -Draw a second box around the sequence where protein synthesis will stop. What is this sequence called? -Label the N-terminus and C-terminus of the polypeptide (amino acid) chain.arrow_forwardNeed help:, The rRNAs are isolated from the large subunit of a bacterial ribosome and separated by density gradient centrifugation. Draw the resulting density gradient and label the bands observed. Which rRNA is longest?arrow_forward
- Consider 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_forwardANWER FAST NO NEED FOR LONG EXPLANATION 1. In the sugar-phosphate backbone of DNA, the phosphate group is located in the 3’ end while the deoxyribose is present in the 5’ end. Select one: True False 2. Not all missense mutations will lead to nonfunctional proteins. It all depends on where the substitution lies in the polypeptide chain and how it will affect protein folding and activity. Select one: True False 3.What component(s) is/are involved in transcription? a.Sigma factor b.RNA polymerase c.Promoter d.B and C e.All of the abovearrow_forwardWHAT IF? What would be the effect of treating cellswith an agent that removed the cap from mRNAs?arrow_forward
- Need help 1.The RNAs acting in RNAi are about 18 nucleotides long. To judge whether it is possible to uniquely target a particular gene with an RNA of this size, consider the following calculation: what is the expected frequency of occurrence of a specific 18 nucleotide sequence? a.The probability of finding this sequence is ___ . b.Therefore, the frequency of occurrence of this sequence is one in ___ nucleotides. c.The fruit fly genome consists of 1.2×108 base pairs.Using the logic in part a., calculate the minimum length of a unique DNA sequence expected to occur by chance just once in the fruit fly genome. Length = __ base pairsarrow_forwardSynthesize a Protein Below is a region of a gene. Transcribe the gene into a pre-mRNA strand. DNA C T A T T G C A C C T G A G T C C A mRNA What is the name of the enzyme which catalyzes this reaction? _________________________________ What three things must then happen to the pre-mRNA you just synthesized before it is allowed to exit the nucleus?arrow_forwardYes or no? for each gene, transcription is initiated at origin of replication. does pre mrna shorter than mrna? Does one thousand microliters less than a milliliter?arrow_forward
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