53. The DNA sequence from which a functional non-codingRNA is transcribed is often called an RNA gene.a. Trueb. False54. Exons area.A segment of DNA or RNA molecule containingcoding sequencesb. A segment of DNA or RNA molecule which does notcode for proteins and interrupts gene sequencesNeither of theseC.55. Eukaryotic transcription units are classified asSimpleb. ComplexIntergenicd. Extragenice. Both a and ba.C.56. A simple transcription unit containsa. Protein coding exonsb. Upstream control regionsC.57. The primary transcript produced from a simpletranscription unit is processed to yield a single type ofmRNA, encoding a single protein.Both and bTrueb. Falsea.58. Complex transcription units producea. Primary RNA transcripts that can be processed invarious waysb. Alternative mRNAs that are translated into singlepolypeptidec. Both a and b59. Differential splicing of an mRNA lead to production ofisoforms of gene productsTrueb. Falsea.

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Description: 53. The DNA sequence from which a functional non-codingRNA is transcribed is often called an RNA gene.a. Trueb. False54. Exons area.A segment of DNA or RNA molecule containingcoding sequencesb. A segment of DNA or RNA molecule which does notcode for

The fundamental structural and operational unit of heredity is the gene. DNA nucleotides make up the…

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Biology

53. The DNA sequence from which a functional non-coding RNA is transcribed is often called an RNA gene. a. True b. False 54. Exons are a. A segment of DNA or RNA molecule containing coding sequences b. A segment of DNA or RNA molecule which does not code for proteins and interrupts gene sequences c. Neither of these 55. Eukaryotic transcription units are classified as a. Simple b. Complex C. Intergenic d. Extragenic e. Both a and b

53. The DNA sequence from which a functional non-coding RNA is transcribed is often called an RNA gene. a. True b. False 54. Exons are a. A segment of DNA or RNA molecule containing coding sequences b. A segment of DNA or RNA molecule which does not code for proteins and interrupts gene sequences c. Neither of these 55. Eukaryotic transcription units are classified as a. Simple b. Complex C. Intergenic d. Extragenic e. Both a and b

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter16: Regulation Of Gene Expression

Section: Chapter Questions

Problem 5TYK

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1. Transcription: a)State the role of RNA polymerase in gene transcription.b. Explain why the DNA is not used directly for protein translation (i.e., why is mRNA used instead?).c. Explain what occurs when a gene’s promoter region is open for RNA polymerase binding.d. Explain what occurs when a gene’s promoter regions is blocked from binding RNA polymerase.e. Explain how two cells, such as liver cells and skin cells, can become specialized in structure and function despite containing the same genome.
A scientist identifies a potential transcription regulation site 300bp downstream of a gene and hypothesizes that it is a repressor. What experiment (with results) could he perform to support this hypothesis?
An adult with a history of tanning has his genome sequenced. The beginning of a protein-coding region of his DNA reads ATGGGGATATGGCAT. If the protein-coding region of a healthy adult reads ATGGGGATATGAGCAT, identify the site and type of mutation.
A normal mRNA that reads 5’ - UGCCAUGGUAAUAACACAUGAGGCCUGAAC- 3’ has an insertion mutation that changes the sequence to 5' -UGCCAUGGUUAAUAACACAUGAGGCCUGAAC- 3’. Translate the original mRNA and the mutated mRNA, and explain how insertion mutations can have dramatic effects on proteins. (Hint: Be sure to find the initiation site.)
32. All of the following are functions of introns EXCEPT A. Provide buffering capacity against mutations B. Allow shuffling of exons to make new genes C.Allow for alternative splicing, which allows a single gene to encode multiple proteins D. Allow for alternative splicing, which allows multiple genes to encode a single protein
2. Explain the assembly of an RNA Pol II basal transcription initiation complex.
1. Classify the type of mutation that have taken place: silent, missense and nonsense as a result of a single base substitution from UCG codon which codes for cysteine:a) AGC (ser): ________b) UGU (cys): ________c) GGC (gly): _______d) UGA (stop): _______e) UUC (phen): _______2. A single base addition and a single base deletion approximately 15 bases apart in the mRNA specifying the protein lysozyme from the bacterial virus T4 caused a change in the protein fromits wil-type composition….lys-ser-pro-ser-leu-asn-ala-ala-lys…..to the mutant form lys-val-his-his-leu-met-ala-alalys.a. Decipher the segment of mRNA for both the original protein and the double mutant.b. Which base was added? Which was deleted?3. Given is the 30 nucleotides in the human gene for hemoglobin (the oxygen-carrying protein in the red blood cells): 5’ TAC-CAC-GTG-GAC-TGA-GGA-CTC-CTC-TTC-AGA 3’a. What is the complementary strand?b. Deduce the mRNA in this coding region.c. What is the amino acid sequence based on this…
26) Eukaryotes are unable to couple transcription and translation because: A) the two processes occur in separate regions of the cell B) they do not have the specialized ribosomes that occur in bacteria C) the genetic code in eukaryotes is incompatible with the formation of polyribosomes D) the mRNA of eukaryotes do not have the appropriate spacers that polycistrons allow for polyribosomes to form E) eukaryotic mRNA molecules are monocistronic. asap please.
1. Considering the following nucleotide sequence in an mRNA molecule: 5’ AUG UUA CGU AAU GCU GUC GAA UCU AUU UGC UUU ACA UAA 3' a) Write the sequence of the DNA template (antisense) strand from which the mRNA was synthesized. b) Write the sequence of the DNA coding (sense or informational) strand complementary to the template strand. c) Write the sequence of tRNA anticodon that corresponds to the given mRNA molecule. d) Write the amino acid sequence of the peptide synthesized from the given mRNA nucleotide sequence. e) Draw the structure of the pertide fragment made up of the first five (5) amino acids in the given polypeptide.
1.- Outline the general process of transcription (dna->rna) include a diagram a) include the basic enzymes involved and a description of their actions b) what is the product of transcription c)what will the cell do with the product d)where does the transcription take place in prokaryotic cell
1. a)What are the two types of ncRNA used in translation? b.) How is translation terminated when the ribosome reaches a stop codon?
2b) Once an RNA polymerase has initiated transcription, it will release the sigma factor or sigma subunit and bind other proteins known as elongation factors before it begins moving down the DNA template doing strand elongation. Briefly explain why this is necessary - why can't RNA polymerase + sigma factor do all of transcription?