Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 13, Problem 3TY
Summary Introduction
Introduction: Many different functions can be carried out by ncRNAs as they have the ability to bind with many different types of molecules such as DNA, other mRNAs, proteins or other small molecules. This is the reason that many different processes such as
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Changes in a cell that affect micro RNAs lead to cancer because miRNAs...
a. help a cell to maintain a tight control on protein levels in a cell.
b. decrease the level of a specific protein.
c. increase the level of a specific protein.
d. prevent the Warburg effect.
In gene silencing, the “dicer” enzymea. assembles siRNAs into a RISC complex.b. unwinds the RISC complex.c. binds siRNA to mRNA sequences complementary to it.d. slices up double-stranded RNA molecules
Abnormalities in the expression of ncRNAs are associated witha. many forms of cancer.b. neurological disorders.c. cardiovascular diseases.d. all of the above.
Chapter 13 Solutions
Biology
Ch. 13.1 - Prob. 1CCCh. 13.2 - Prob. 1CCCh. 13.3 - Prob. 1EQCh. 13.3 - Prob. 2EQCh. 13.3 - Prob. 3EQCh. 13.3 - Effects of Non-coding RNAs on Translation and mRNA...Ch. 13.4 - Non-coding RNAs and Protein Sorting Core Skill:...Ch. 13.5 - Core Skill: Modeling The goal of this modeling...Ch. 13 - Prob. 1TYCh. 13 - Prob. 2TY
Ch. 13 - Prob. 3TYCh. 13 - Prob. 4TYCh. 13 - Prob. 5TYCh. 13 - Prob. 6TYCh. 13 - With regard to miRNAs and siRNAs, which of the...Ch. 13 - Cas1 and Cas2 proteins play a role during which of...Ch. 13 - Which of the following components bind to...Ch. 13 - Abnormalities in the expression of ncRNAs are...Ch. 13 - An ncRNA may have one or more of the following...Ch. 13 - What is RNA interference (RNAi)? Explain how the...Ch. 13 - Prob. 3CQCh. 13 - Prob. 1COQCh. 13 - Go to the PubMed website and search for non-coding...
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- After tmRNA releases an mRNA and aberrant polypeptide from a stuck ribosome, the resulting polypeptide will A) be translated B) be destroyed by a protease C) be inserted into the cell membrane D) be used to regulate gene expressionarrow_forwardRegulatory transcription factors can be modulated by a. the binding of small effector molecules. b. protein-protein interactions. c. covalent modifications. d. all of the above.arrow_forwardDuring translation, ____________ is the step in which new t-RNA is attracted to the ribosome (a) the formation of the open promoter complex (b) codon recognition (c) peptide bond formation (d) translocation (e) none of the abovearrow_forward
- When an ncRNA functions as a decoy, ita. contains binding sites for many different proteins, therebypromoting the formation of a large complex.b. recognizes other ncRNAs and sequesters them, therebypreventing them from working.c. can alter its conformation, allowing it to switch betweenactive and inactivate conformations.d. may physically prevent or block a cellular process fromhappening.arrow_forwardWhat strategy does a genetically encoded calcium indicator look like to allow fluorescence imaging of only one cell type in an acute slice of the brain? A.The use of fluorescent protein expression inhibitors in other cells B.The injection of a recombinant virus causing the death of other cells C.The use of a promoter specific to these cells D.Activation of membrane receptors specific to these cellsarrow_forwardWhich of the following is true? a. Enhancers are proteins that bind to activator DNA sequences. b. Activators are proteins that bind to insulator sequences c. Repressors are proteins that bind to enhancer DNA sequences. d. Repressors are proteins which bind to silencer DNA sequencers.arrow_forward
- Promoters are DNA sequences a. near a transcription start site b. bound to a repressor protein c. that inhibit transcription of a gene d. that stimulate ncRNA activityarrow_forwardantibody diversity is generated principally through ? (a) exposure to environmental mutagens (b) targeted DNA amplification (c) RNA-dependant DNA synthesis (d) DNA rearrangement (e) decoding errors and ribosomal frameshiftingarrow_forwardThe role of p53 in normal cells is toa. create cancer-blocking mutations.b. trigger unrestrained cell division.c. detect damaged DNA.d. splice exons together in the correct sequence.arrow_forward
- Which of the following statements about the DNA in one of your brain cells is true? (A) Most of the DNA codes for protein. (B) The majority of genes are likely to be transcribed. (C) It is the same as the DNA in one of your liver cells. (D) Each gene lies immediately adjacent to an enhancer.arrow_forwardBinding of______ to_______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors b. activators; enhancers c. repressors; operators d.repressors; enhancerarrow_forwardBinding of _______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors c. repressors; operators b. activators; enhancers d. repressors; enhancersarrow_forward
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