Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 13, Problem 7TY
With regard to miRNAs and siRNAs, which of the following statements is (are) correct?
- a. miRNAs are transcribed from endogenous genes.
- b. miRNAs are usually a perfect match to an mRNA.
- c. siRNAs are transcribed from endogenous genes.
- d. siRNAs cause mRNA degradation.
- e. both a and d
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Within a cell, the amount of protein made using a given mRNA molecule depends partly on
A. the presence of certain transcription factors.
B. the rate at which the mRNA is degraded.
C. the degree of DNA methylation.
D. the number of introns present in the mRNA.
please explain which is correct and incorrect and why
According to the adaptor hypothesis, is each the following statementstrue or false?A. The sequence of an anticodon in a tRNA directly recognizes acodon sequence in mRNA, with some allowance for wobble.B. The amino acid attached to the tRNA directly recognizes acodon sequence in mRNA.C. The amino acid attached to the tRNA affects the binding of thetRNA to a codon sequence in mRNA.
If a gene sequence is more tightly coiled around histones, then which of the following is the most likely consequence?
A) This gene is more likely to undergo mutation as it is being expressed
B) This gene is unlikely to be transcribed while in this conformation
C) This gene will be transcribed often while in this conformation
D) This gene will be translated more efficiently
.
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What 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_forwardFor each statement about gene expression mechanisms, choose the correct end to the sentence. For each gene, the template strand for transcription is determined by…. The direction of translation is determined by…… The tissue-specificity of protein production is determined by…. choices: a. location of the start codon b. location of the promoter c. direction of polymerization by RNA polymerase d. none of these e. direction of movement of ribosomes f. overall orientation of the chromosomearrow_forwardWhich 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_forward
- Below is a graphical representation of eukaryotic precursor mRNA. A. Outline each modification that must happen to get a mature m-RNA. B. How does the absence of introns in prokaryotic genes affect prokaryotic gene expression? C. How will gene expression be affected if all of the spliceosomes are removed from the bacteria sample? Explain.arrow_forwardIf a human gene is found to contain five introns, the mature mRNA encoded by that gene would have how many exons? a) four exons b) five exons c) six exons d) there could be multiple mRNA that contain between one and six exonsarrow_forwardChanges 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.arrow_forward
- Compare and contrast the formation of mRNA in bacterial and eukaryotic cells. How do the differences affect the way in which each type of mRNA is translated? Does one system have obvious advantage in term of energy cost? Which system offers greater opportunities for control of gene expression?arrow_forwarda piece of DNA is produced with 1) an enhancer from a gene expressed in the liver, 2) a promoter from a gene expressed in bone cells, and 3) exons and introns from a gene expressed in the brain introduction of this gene into a mouse then results in high levels of A) a brain protein in the liver B) a bone protein in the brain C) a brain protein in the bone D) a liver protein in the brain E) no protein would be madearrow_forwardYou hope to study a gene that codes for a neurotransmitter protein produced in human brain cells. You know the amino acid sequence of the protein. Explain how you might (a) identify what genes are expressed in a specific type of brain cell, (b) identify (and isolate) the neurotransmitter gene, (c) produce multiple copies of the gene for study, and (d) produce large quantities of the neurotransmitter for evaluation as a potential medication.arrow_forward
- a) What is a gene promoter? b) What proteins bind to a promoter? c) What do those proteins do to control gene expression?arrow_forwardRegarding transcriptional promoter sites, which of the following statements are true? Select one or more than one: a)They are located in the gene (DNA) whose information will be transcribed b)They are found at the 3 'end of the gene that will be transcribed c)Some of them are called 'TATA box' d)They are found in the DNA, 'upstream' of the gene to be transcribed. e)They are proteins of the cytoplasmarrow_forwardWhich sequence is most likely to be found in a promoter? a) CGGTGTATATCGTAC b) GTACAGTCATCCCGT c) AAATCTACTACGATT d) GGGTTGGGTTGGGTTarrow_forward
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