EBK MICROBIOLOGY:W/DISEASES BY BODY...-
5th Edition
ISBN: 9780134608242
Author: BAUMAN
Publisher: PEARSON
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Chapter 7, Problem 2SA
List several ways in which eukaryotic messenger RNA differs from prokaryotic mRNA.
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Eukaryotic messenger RNA can undergo post synthetic processing after transcription and before translation. One of the
processing steps is splicing, where portions of the RNA are removed and the remaining RNA are joined together. Classify the
statements regarding mRNA splicing as true or false.
True statements
False statements
In splicing, intron sequences are removed from the mRNA in the form of
lariats (loops) and are degraded.
Splicing occurs while the mRNA is still in the nucleus.
Splicing of mRNA does not involve any proteins.
One MRNA can sometimes code for more than one protein by splicing at
alternative sites.
Splicing occurs while the mRNA is attached to the nucleosome.
Prokaryotic mRNA has some unique features compared to eukaryotic mRNA. Which of the following would apply only to prokaryotic mRNA (and not to eukaryotic mRNA)?
contains introns
polycistronic
produced by RNA polymerase
synthesized in the nucleus
Eukaryotic messenger RNA can undergo post synthetic processing after transcription and before translation. One of the
processing steps is splicing, where portions of the RNA are removed and the remaining RNA are joined together. Classify the
statements regarding mRNA splicing as true or false.
True statements
Splicing of mRNA does not involve any proteins.
Answer Bank
Splicing occurs while the mRNA is attached to the spliceosome.
In splicing, intron sequences are removed from the mRNA in the form of lariats (loops) and are degraded.
One mRNA can sometimes code for more than one protein by splicing at alternative sites.
False statements
Splicing occurs after the mRNA enters the cytoplasm but before it binds to the ribosome.
Chapter 7 Solutions
EBK MICROBIOLOGY:W/DISEASES BY BODY...-
Ch. 7 - DNA replication requires a large amount of energy,...Ch. 7 - Vibrio vulnificus Infection Greg enjoyed Floridas...Ch. 7 - Prob. 2TMWCh. 7 - Prob. 3TMWCh. 7 - Why is the genetic ancestry of microbes much more...Ch. 7 - Prob. 1CCSCh. 7 - Which of the following is most likely the number...Ch. 7 - Which of the following is a true statement...Ch. 7 - A plasmid is ___________. a. a molecule of RNA...Ch. 7 - Prob. 4MC
Ch. 7 - Prob. 5MCCh. 7 - Which of the following molecules functions as a...Ch. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - The Ames test ___________. a. uses auxotrophs and...Ch. 7 - Which of the following methods of DNA repair...Ch. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Which of the following statements is true? a....Ch. 7 - Prob. 14MCCh. 7 - Although two cells are totally unrelated, one cell...Ch. 7 - Prob. 16MCCh. 7 - Prob. 17MCCh. 7 - Prob. 18MCCh. 7 - Prob. 19MCCh. 7 - Prob. 20MCCh. 7 - Prob. 21MCCh. 7 - Prob. 22MCCh. 7 - Prob. 23MCCh. 7 - Before mutations can affect a population...Ch. 7 - Prob. 25MCCh. 7 - Fill in the Blanks 1. The three steps in RNA...Ch. 7 - Fill in the Blanks 2. A triplet of mRNA...Ch. 7 - Fill in the Blanks 3. Three effects of point...Ch. 7 - Fill in the Blanks 4. Insertions and deletions in...Ch. 7 - Fill in the Blanks 5. An operon consists of...Ch. 7 - Prob. 6FIBCh. 7 - Prob. 7FIBCh. 7 - Fill in the Blanks 8. A gene for antibiotic...Ch. 7 - Fill in the Blanks 9. ______ are nucleotide...Ch. 7 - Fill in the Blanks 10. ____________ is a...Ch. 7 - Fill in the Blanks 11.________ RNA carries amino...Ch. 7 - Fill in the Blanks 12. ______ RNA and ______ RNA...Ch. 7 - How does the genotype of a bacterium determine its...Ch. 7 - List several ways in which eukaryotic messenger...Ch. 7 - Compare and contrast intrans and exons.Ch. 7 - Polypeptide synthesis requires large amounts of...Ch. 7 - Describe the operon model of gene regulation.Ch. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Describe the formation and function of mRNA, rRNA,...Ch. 7 - Prob. 9SACh. 7 - Explain the central dogma of genetics.Ch. 7 - Compare and contrast the processes of...Ch. 7 - Fill in the following table:Ch. 7 - On the figure below, label DNA polymerase I, DNA...Ch. 7 - Prob. 2VICh. 7 - The drugs ddC and AZT are used to treat AIDS....Ch. 7 - If molecules of mRNA have the following nucleotide...Ch. 7 - A scientist uses a molecule of DNA composed of...Ch. 7 - Explain why an insertion of three nucleotides is...Ch. 7 - How could scientists use siRNA to turn off a...Ch. 7 - Prob. 5CTCh. 7 - Prob. 6CTCh. 7 - Prob. 7CTCh. 7 - Prob. 8CTCh. 7 - Corynebacterium diphtheriae, the causative agent...Ch. 7 - Prob. 10CTCh. 7 - The endosymbiotic theory states that mitochondria...Ch. 7 - Hydrogen bonds between complementary nucleotides...Ch. 7 - On average, RNA polymerase makes one error for...Ch. 7 - We have seen that wobble makes the genetic code...Ch. 7 - If a scientist synthesizes a DNA molecule with the...Ch. 7 - What DNA nucleotide triplet codes for codon UGU?...Ch. 7 - Suppose you want to insert into your dog a gene...Ch. 7 - Using the following terms, fill in the following...
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- Eukaryotic mRNA has a significantly longer half life than its prokaryotic counterpart. How is this accomplished in eukaryotes? What processes tend to degrade mRNA molecules in both eukaryotes and prokaryotes, and why are these processes needed?arrow_forwardb) In eukaryotes, the newly synthesized MRNA undergoes modifications before it is transported across the nuclear membrane into the cytoplasm. Outline any two of the three modifications.arrow_forwardList three molecular changes that take place in the processing of eukaryotic mRNA.arrow_forward
- List and draw out four distinctive features of most eukaryotic mRNAs.arrow_forwardThe template strand (i.e.: the strand that is transcribed into RNA, which is usually represented “at the bottom”) of a segment of double helical DNA contains the sequence (5′) TCCGCTCCATCG (3′). What is the base sequence of the mRNA that can be transcribed from this strand?arrow_forwardWhat are the major differences in the synthesis and structure of prokaryotic and eukaryotic mRNAs?arrow_forward
- Compare bacterial and eukaryotic mRNAs, and explain the functional significance of their structural differences.arrow_forwardA certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).arrow_forwardHow and why do prokaryotic mRNA and eukaryotic mRNA differ?arrow_forward
- Explain briefly how translation is initiated from a) prokaryotic mRNA and b) eukaryotic mRNA. Include names of any relevant sequences on the mRNA, proteins involved, including ribosomal subunits.arrow_forwardProkaryotic mRNA has some unique features compared to eukaryotic mRNA which of the following would apply only to prokaryotic mRNA and not to eukaryotic mRNA Synthesized in the nucleus Producer by RNA polymerase contains introns polycistronicarrow_forwardThe eukaryotic cell is different from the prokaryotic cell. Outline the structural difference between these two types of cell and suggest two reasons why eukaryotic mRNA needs to be modified before translation.arrow_forward
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