Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 15, Problem 25CTQ
A scientist observes that a cell has an RNA polymerase deficiency that prevents if from making proteins. Describe three additional observations that would together support the conclusion that a defect in RNA polymerase I activity, and not problems with the other polymerases, causes the defect.
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Some antibiotic drugs fight infection by interfering with DNA replication, transcription, or translation in bacteria. Indicate whether each of the following antibiotic drug effects is on replication, transcription, or translation.
HINT Each answer (replication, transcription, and translation) is used only once for the following:
a. Rifampin binds to bacterial RNA polymerase.
b. Streptomycin binds bacterial ribosomes, disabling them.
c. Quinolone blocks an enzyme that prevents bacterial DNA from unwinding.
Which of the following statements about the processes of the central dogma is/are incorrect?
I. Replication occurs only once during the life cycle of a cell.
II. The entire sequence of a DNA molecule carries instructions for the synthesis of proteins and nucleic acids.
III. The products of transcription all eventually undergo translation.
IV. Transcription and replication both involve the use of RNA molecules.
V. The translation of the genetic code is directly based on the sequence of the template DNA strand.
O , I, and V
O II, II, and V
O l and IV
O II, II, and IV
O Only l is incorrect
Below is a list of functions related to protein synthesis. Place the number for the function in the blank above its corresponding structure. 1. Copies the genetic code from DNA and carries it to the ribosomes 2. Splits DNA into two strands and transcribes mRNA from the antisense strand 3. Carries amino acids to the ribosome 4. Area on DNA antisense strand that RNA polymerase binds to begin transcription
Answer
Answer
Answer
Answer
Promoter region
mRNA
RNA polymerase
tRNA
Chapter 15 Solutions
Biology 2e
Ch. 15 - Figure 15.11 A scientist splices a eukaryotic...Ch. 15 - Figure 15.13 Errors in splicing are implicated in...Ch. 15 - Figure 15.16 Many antibiotics inhibit bacterial...Ch. 15 - The AUC and AUA codons in mRNA both specify...Ch. 15 - How many nucleotides are in 12 mRNA codons? 12 24...Ch. 15 - Which event contradicts the central dogma of...Ch. 15 - Which subunit of the E. coli polymerase confers...Ch. 15 - The -10 and -35 regions of prokaryotic promoters...Ch. 15 - Three different bacteria species have the...Ch. 15 - Which feature of promoters can be found in both...
Ch. 15 - What transcripts will be most affected by low...Ch. 15 - How do enhancers and promoters differ? Enhancers...Ch. 15 - Which pre-mRNA processing step is important for...Ch. 15 - What processing step enhances the stability of...Ch. 15 - A scientist identifies a pre-mRNA with the...Ch. 15 - The RNA components of ribosomes are synthesized in...Ch. 15 - In any given species, there are at least how many...Ch. 15 - A scientist introduces a mutation that makes the...Ch. 15 - Imagine if there were 200 commonly occurring amino...Ch. 15 - Discuss how degeneracy of the genetic code makes...Ch. 15 - A scientist sequencing itiRNA identifies the...Ch. 15 - If mRNA is complementary to the DNA template...Ch. 15 - In your own words, describe the difference between...Ch. 15 - A fragment of bacterial DNA reads: 3’...Ch. 15 - A scientist observes that a cell has an RNA...Ch. 15 - Chronic lymphocytic leukemia patients often harbor...Ch. 15 - Transcribe and translate the following DNA...Ch. 15 - Explain how single nucleotide changes can have...Ch. 15 - A normal mRNA that reads 5’ -...
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- 1) name three types of RNA in a cell and their functions; 9. What is the role of RNA polymerase? To answer the question please: 2) draw a scheme of RNA synthesis; 3) name the enzymes required for RNA synthesis.arrow_forwardDescribe how the absence of the RNA polymerase enzyme affects the process.arrow_forwardDescribe the structure of a bacterial genome, and explain how it differs from a eukaryotic genome. Explain what a plasmid is, and describe the role of plasmids in the spread of antibiotic resistance genes. Explain how bidirectional semiconservative DNA replication copies the circular chromosome of a bacterium during cell division. Explain the steps of replication by DNA polymerase, including initiation, elongation, and termination. Explain the different kinds of mutations and how they occur.arrow_forward
- Put the following steps of transcription in orderarrow_forwardYou are studying RNA viruses and have discovered one that grows well in a culture of eukaryotic cells. You know that the virus is a single-stranded RNA virus, but you don't know if it is positive or negative stranded. Your lab-mate says, "Well, just treat your cell culture with cyclohexamide and see if the virus replicates its genome." You know that cyclohexamide inhibits protein elongation by binding to eukaryotic ribosomes. What is the basis of your lab-mate's suggestion?arrow_forwardDefine the term RNA polymerase?arrow_forward
- the human immunodeficiency virus HIV uses RNA rather than DNA to encode genetic information. During infection, however, HIV uses an enzyme known as reverse transcriptase to generate double-stranded DNA. Generally speaking, how would the enzyme generate a double strand of DNA from a single strand of RNA?arrow_forwardDetermine what amino acid will be formed from the given DNA strand below: 3’ T A C A T G C C G A A T 5’ Note: Prepare the partner strand of this DNA. Discuss how will replication happen by mentioning the enzyme needed then transcribe to form mRNA. Discuss what will happen to mRNA, then translate, mentioning the anticodon to be used. Look at the genetic code to know what amino acid will become part of the polypeptide chain. 1. Partner DNA strand 2. the mRNA strand 3. the tRNA 4. the formed amino acidsarrow_forwardExplain the role of RNA polymerase.arrow_forward
- Assume that a mutation occurs in the gene that encodes each of the following RNA polymerases. Match the mutation with its possible effects by placing the correct letter or letters in the blanks below. There may be more than one effect for each mutated polymerase. A mutation in the gene that codes for E RNA polymerase I RNA polymerase II RNA polymerase III Possibleeffects a. tRNA is not synthesized b. Some ribosomal RNA is not synthesized c. Ribosomal RNA is not processed d. pre-mRNA is not processed e. Some mRNA molecules are not degraded f. pre-mRNA is not synthesizedarrow_forwardTo promote genetic diversity in bacteria, it has been found that some species have a genetic mechanism that allows them to increase their mutation rate during DNA replication. A scientist hypothesizes that the functions of the following two enzymes would be impacted by this mechanism. In each case, state if you agree and provide a reason for your answer. i) DNA primase ii) DNA polymerase IIIarrow_forwardWhich of the following statements are true regarding the properties of DNA and RNA polymerase. Select all that apply. Both DNA and RNA polymerase synthesize nucleic acid strands in the 5" to 3' direction. Both DNA and RNA polymerase can initiate strand synthesis on their own. I. RNA polymerase initiates strand synthesis, while DNA polymerase depends upon an existing strand to continue synthesis. II. RNA polymerase only uses ribonucleotides for strand synthesis. DNA polymerase only uses deoxyribonucleotides for strand synthesis. V. Au DNA and RNA polymerases from eukaryotes behave very differently from DNA and RNA polymerases found in prokaryotes. O VI.arrow_forward
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