Microbiology with Diseases by Body System (5th Edition)
5th Edition
ISBN: 9780134477206
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 7, Problem 22MC
Summary Introduction
Introduction:
The messenger RNA that carries genetic information from the chromosomes into the ribosomes are called as mRNA. It is synthesized in the nucleus of a cell and carries the genetic information from the nucleus to the cytoplasm. Hence, it is called as a messenger RNA. This messenger RNA is further translated into proteins.
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Which of the following describes the interactions between a codon and an anticodon?
A. A codon and an anticodon become covalently bonded together due to the activity of the ribosome.
B. A codon and anticodon do not come into direct contact because codons are in the nucleus but anticodons are in the cytoplasm.
C. A codon and anticodon are attracted to each other due to hydrogen bonding.
D. A codon and an anticodon are linked together by an amino acid.
..
In translation of an mRNA into a protein, the first amino acid that is attached to the start codon is which of the following?
a. O-formylmethionine
b. Serine
c. N-formylmethione
d. Cysteine
Degeneracy of the genetic code denotes the existence of which of the
following?
A. codons that can wobble at the 5' position
B. multiple codons for a single amino acid
C. codons consisting of only two bases
D. base triplets that do not code for any amino acid
E. codons that are not overlapping
Chapter 7 Solutions
Microbiology with Diseases by Body System (5th Edition)
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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- The AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this? a. complementarity b. nonsense codons c. universality d. degeneracyarrow_forwardWhich of the following most accurately describes the anticodon? A. Contains a sequence complementary to the codon. B. Reintroduces thymine back into the sequence and removes uracil. C. Contains the sequence in the reverse orientation (3-5 vs 5-3). D. Contains a sequence identical to the codon.arrow_forwardWhich of the following regions on the tRNA are composed of a sequence of nucleotides? a. anticodon that binds to codon in mRNA b. anticodon that binds to codon in ribosomes c. anticodon that binds to codon in tRNA synthetase d. none of the abovearrow_forward
- Which of the following steps in protein synthesis does not require a direct supply of energy? a. proofreading step by certain aminoacyl-tRNA synthetases b. translocation of mRNA in a ribosome c. linkage of an amino acid to its cognate tRNA d. alignment of a tRNA anticodon with an mRNA codonarrow_forwardWhich of the following is not a nucleotide? a. adenosine triphosphate b. adenosine diphosphate c. adenine d. cytosine e. arabinosearrow_forwardA DNA antisense strand contains the following nucleotide base sequence: AGT GTC TTT GAC From this, what is the nucleotide sequence of the mRNA strand that is transcribed? a. AGU GUC UUU GAC b. UCU CUG UUU CAG UCA CAG AAA CUG d. TCA CAG AAA CTG C. How many amino acids does the mRNA strand above code for? .arrow_forward
- The role of transfer RNA (tRNA) is to match a codon (3 bases) in mRNA sequence to: A. An amino acid B. A peptide bond C. An R group D. A start codonarrow_forwardWhich of the following statements about mRNA is INCORRECT? A. the sugar moiety of mRNA is D-ribose B. the polynucleotide chain contains sequences made up of three bases called codons C. MRNAS have a 5'03' orientation D. all mRNAs have lengths equal to the DNA from which it is transcribed E. MRNA exists as single stranded moleculearrow_forwardWhich of the following is a true statement concerning RNA? Group of answer choices a. mRNA is single stranded; tRNA and rRNA are double stranded b. each tRNA binds to a specific amino acid c. rRNA and mRNA last for only a short time in the cell d. tRNA contains the base thyminearrow_forward
- Which of the following are encoded in the terminating codon in protein synthesis? a. Selenocycteine and Pyrrolysine b. GABA and Homocysteine c. Hydroxyproline and Selenocycteine d. Ornithine and Citrullinearrow_forwardWhich of the following nucleic acids is a component of ribosomes? a.DNA b.Transfer RNA c.Ribosomal RNA d.Messenger RNAarrow_forwardWhich of the following BEST describes the characteristics and function of siRNA? A. a short strand of RNA that can complement and inactivate a sequence of mRNA B. a short strand of RNA that can act as a transcription factor to initiate transcription C. a strand of DNA that can bind to and inactivate an mRNA sequence D. a tRNA that is not able to attach to a ribosome and therefore inhibits the process of translationarrow_forward
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