Chapter 13 Practice Exam 42 Questions with Verified Answers,100% CORRECT, Exams of Nursing

Download Chapter 13 Practice Exam 42 Questions with Verified Answers,100% CORRECT and more Exams Nursing in PDF only on Docsity! Chapter 13 Practice Exam 42 Questions with Verified Answers Which of the following is a type of RNA that gets translated? A) rRNA B) mRNA C) tRNA D) miRNA E) A, B, and C all get translated. - CORRECT ANSWER B Which of the following RNA molecules are required for the process of translation? A) crRNA B) tRNA C) snRNA D) snoRNA E) siRNA - CORRECT ANSWER B Over time, DNA replaced RNA as the primary carrier of genetic information, and the chemical stability of DNA is believed to be the key reason for this. Which attribute of DNA is the reason behind its chemical stability? A) DNA lacks a free hydroxyl group on the 2 -carbon atom of its sugar.′ B) Unlike RNA, DNA is usually double-stranded. C) DNA does not usually form hairpin loops. D) One of the two pyrimidines found in DNA does not involve uracil. E) DNA contains thymines, which make it more chemically stable. - CORRECT ANSWER A This molecule is synthesized using nucleotides containing the bases adenine, guanine, cytosine, and uracil. A) RNA only B) DNA only C) Both RNA and DNA D) Neither RNA nor DNA - CORRECT ANSWER A In eukaryotes, tRNAs are A) transcribed in the nucleus and function in the nucleus. B) transcribed in the nucleus but function in the cytoplasm. C) transcribed in the cytoplasm and function in the cytoplasm. D) transcribed in both the nucleus and the cytoplasm and function in the cytoplasm. E) transcribed in the cytoplasm and function in the nucleus. - CORRECT ANSWER B ____________________ probably began the evolution of life on Earth. A) DNA B) RNA promoters C) DNA polymerases D) RNA polymerases E) Ribozymes - CORRECT ANSWER E During transcription, which parts of a DNA molecule are transcribed into RNA? A) All of the nucleotides in DNA on both strands B) All of the nucleotides on one strand of DNA C) Only parts of the DNA that encode mRNA D) Only regions of the DNA that contain genes E) Only regions of the DNA that encode rRNA - CORRECT ANSWER D Which of the following statements are TRUE regarding transcription in most organisms? A) All genes are transcribed from the same strand of DNA. B) Both DNA strands are used to transcribe a single gene. C) Different genes may be transcribed from different strands of DNA. D) The DNA template strand is used to encode double stranded RNA. E) The DNA nontemplate strand is used to encode single stranded RNA. - CORRECT ANSWER C Which of the following is a sequence of DNA where transcription is initiated? A) Hairpin loop B) TBP C) Initiator D) Sigma factor E) Promoter - CORRECT ANSWER E C) Both RNA and DNA D) Neither RNA nor DNA - CORRECT ANSWER C The polymerase that synthesizes this molecule uses DNA as a template and synthesizes new strands from 5 to 3 . ′ ′ A) RNA only B) DNA only C) Both RNA and DNA D) Neither RNA nor DNA - CORRECT ANSWER C This molecule is made of nucleotides joined by phosphodiester bonds that connect the 2 OH to the 5 phosphate.′ ′ A) RNA only B) DNA only C) Both RNA and DNA D) Neither RNA nor DNA - CORRECT ANSWER D What is the function of eukaryotic RNA polymerase I? A) Transcription of rRNA genes B) Transcription of mRNA genes C) Transcription of tRNA genes D) Transcription of snRNAs E) Initiation of transcription (but not elongation) - CORRECT ANSWER A Which of the following is NOT required for transcription? A) Ribonucleotides B) RNA primers C) DNA template D) RNA polymerase E) Promoter - CORRECT ANSWER B Which statement about RNA polymerase is NOT true? A) RNA polymerase adds a ribonucleotide to the 3' end of a growing RNA molecule. B) RNA polymerase binds to a promoter to initiate transcription. C) During transcription of a gene, RNA polymerase reads only one strand of DNA. D) RNA polymerase reads a template strand of DNA 5' to 3'. E) RNA polymerase has many subunits. - CORRECT ANSWER D If the following DNA strand were used as a template, what would the sequence of an RNA be? 5 GTACCGTC 3′ ′ A) 5 GUACCGUC 3′ ′ B) 5 GACGGTAC 3′ ′ C) 5 CAUGGCAG 3′ ′ D) 5 GACGGUAC 3′ ′ E) 5 GUCGGUAC 3 - CORRECT ANSWER D′ ′ If the sequence of an RNA molecule is 5'-GGCAUCGACG-3', what is the sequence of the nontemplate strand of DNA? A) 5'-GGCATCGACG-3' B) 3'-GGCATCGACG-5' C) 5'-CCGTAGCTGC-3' D) 3'-CCGTAGCTGC-5' E) 3'-CGTCGATGCC-5' - CORRECT ANSWER A Which of the following is NOT necessary for RNA polymerase to recognize the promoter of a bacterial gene? A) Sigma factor B) Origin of replication C) -10 consensus sequence D) -35 consensus sequence - CORRECT ANSWER B Which of the following features is primarily responsible for rho protein to cause termination of transcription? A) Recognizing unstructured RNA B) Helicase activity C) Migrating behind RNA polymerase D) RNA-binding activity E) Polymerase activity - CORRECT ANSWER B Prokaryotic promoters contain the sequence TATAAT at the position -10 from the transcription start. A) +1 B) -1 C) -10 D) -25 E) -35 - CORRECT ANSWER C In prokaryotic RNA polymerases, the holoenzyme consists of the core enzyme and the A) rho factor. B) TFIID. C) TBP. D) omega subunit. E) sigma factor - CORRECT ANSWER E When does sigma factor normally dissociate from RNA polymerase? A) After transcription has terminated B) After the process of initiation C) After the addition of nucleosomes D) After the binding of rho E) Following the addition of nucleosomes - CORRECT ANSWER B In prokaryotes, rho-independent transcription termination depends on a secondary structure formed in A) the RNA polymerase that is transcribing the gene. B) the DNA template. C) the RNA that is being transcribed. D) a protein factor that binds to RNA polymerase. E) a protein factor that binds to the RNA that is being transcribed. - CORRECT ANSWER C An in vitro transcription system that contains a bacterial gene initiates transcription, but from random points on the DNA. Which of the following proteins most likely is missing from the reaction? A) Sigma factor B) Rho factor