A cell that is growing in extremely high temperatures is likely to have a very high activity of which enzyme? Topoisomerase I DNA Gyrase Reverse gyrase Topoisomerase IV
Q: Which of the following functions in the regulation of gene expression? plasmids euchromatin…
A: Gene expression in eukaryotic cells is mediated by activators and repressors of transcription as…
Q: Binary fission in bacteria is beneficial for all of the following reasons EXCEPT: Group of answer…
A: Binary fission is the process in prokaryotic organisms, where a single cell divides into two cells…
Q: Determine whether the phrases describe type I topoisomerases, type II topoisomerases, or both type I…
A: These are enzymes that catalyse temporary breaks in the circular DNA molecule to wind or unwind DNA.…
Q: In a nucleosome, the DNA is wrapped around ribosomes a thymine dimer polymerase molecules histones
A: Nucleosome Nucleosome is a segment of DNA that wrapped around a protein core.
Q: Which of the following is the prokaryotic helicase? DnaB DnaD DnaA DnaC
A: Helicases are enzymes that help double stranded DNA helixes unwind during DNA replication,…
Q: Each peak in a chromatogram corresponds to: A fluorescent ddNTP which has been released from the…
A: Ans-. A fluorescent ddNTP which has been incorporated into the DNA fragment resulting in the…
Q: The enzyme sucrase cleaves the disaccharide sucrose into the monosaccharides glucose and fructose.…
A: INTRODUCTION Hydrolase These are group of enzymes that catalyse the chemical bond breakdown by…
Q: Why is it important for DNA to be copied before a cell undergoes mitosis
A: Answer: MITOSIS = It is the process of producing two identical daughter cells from the parent cell…
Q: What catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA polymer…
A: Answer - Option A - DNA Polymerase
Q: Draw replication forks that show what you would expect to see if a cell were unable to make the…
A: Replication is the process of synthesis of new DNA strand from the existing ones. The existing DNA…
Q: The following image shows how DNA can be damaged by UV light. In this reaction, UV light promotes…
A: Mutation: It is a heritable change in the genetic material of an organisms that give rise to…
Q: Which of the following enzymes can break, and rejoin, phosphodiester bonds during the normal DNA…
A: DNA replication is a process that occurs in all living organisms. In this process, DNA strands of…
Q: What mechanism will be used in the following dna changes a change in the structure of a base cause…
A: Introduction: DNA changes can refer to alterations to the genetic data stored inside the DNA…
Q: Which of the following is involved in the repair of cyclobutane pyrimidine dimers? DNA pol I…
A: The process by which a cell uses a series of special enzymes to repair mutation (changes ) in DNA…
Q: To promote genetic diversity in bacteria, it has been found that some species have a genetic…
A: "Genetic variation" is the result of the recombination of genetic material during the inheritance…
Q: options: Type I topoisomerase Type II topoisomerase Type III topoisomerase type IV…
A: A DNA Topoisomerase was discovered by James Wang, it is a nuclease, breaks a phosphodiester bond in…
Q: Which of the following enzymes is needed to produce mRNA? ligase helicase DNA…
A: Question - Which of the following enzymes is needed to produce mRNA? A.) ligase B.)…
Q: Topoisomerases can cut phosphodiester bonds and the DNA ligases will have to seal the nicks whenever…
A: DNA ligases are enzymes that catalyze formation of a phosphodiester bond at a single-strand break in…
Q: Which enzyme is responsible for proofreading nucleotides during DNA replication? a nuclease b…
A: Transmission of DNA or genetic material is very crucial to propagate gene from parent to offspring.…
Q: Shown below is a drawing showing the result of an experiment in which an RNA molecule is allowed to…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Enzymes that catalyze DNA denaturation or melting are: gyrases topoisomerases helicases…
A: DNA is a genetic material that is a double stranded structure polymer of nucleotides. DNA…
Q: Which of the following would be involved in the excision repair of a thymine dimer? O DNA polymerase…
A: DNA is the nucleic acids present in the organisms. DNA is the deoxy ribose nucleic acid in which…
Q: Supercoiling of DNA requires GTP as source of energy is only observed in prokaryotes is…
A: DNA is a genetic material present in most living organisms. In case of eukaryotic cells DNA is found…
Q: Which enzyme is responsible for unwinding and separating the parental DNA strands? a polymerase…
A: Each parental strand provides a blueprint for the synthesis of a new complimentary daughter thread…
Q: Cell cultures can be synchronized, or brought into the same phase of the cell cycle, by various…
A: Deoxyribonucleic acid is a molecule composed of two polynucleotide chains that coil around each…
Q: Which of the following enzymes is not involved in bacterial DNA replication? DNA Polymerase III…
A: Bacteria is a prokaryotic organism that do not DNA organised as chromosomes. It lacks well defined…
Q: Conjugation results in the transfer of genetic material between two bacterial cells, but only occurs…
A: Given: Conjugation results in the transfer of genetic material between two bacterila cells. It…
Q: Which of the following statements can be said about the enzyme telomerase? Select all the answers…
A: The correct answers are : Option 2 Option 3 Option 4.
Q: Which of the following is correct about the function of DNA Ligase? O DNA ligase is used on the…
A: In the process of replication ie, copying the strand of DNA. There are several enzymes needed to…
Q: The holoenzyme consists of 2 DNA polymerase core enzymes a single sliding clamp-loader complex two…
A: DNA polymerase is the enzymes which is very important in assembling of the nucleotide to form the…
Q: Which subunit of bacterial RNA polymerase interacts with the -10 region of the promoter?
A: There are two questions on Transcription.
Q: If mutations occur in DNA, there are several mechanisms by which a cell can repair the defect. One…
A: The deoxyribonucleic acid (DNA) is the double-stranded molecule which is the genetic material in…
Q: Which of the following has activity that is most similar to RNA Polymerase? Helicase DNA…
A: RNA polymerase It is defined as the enzyme which is involved in copying the sequences of DNA into…
Q: The enzyme is used to remove tension from the DNA double helix during replication called?…
A: DNA replication is a key mechanism in every living system that allows for the faithful copying of…
Q: What kind of DNA damage is depicted in this picture: H2D но. H.N Bar strand breakage O base deletion…
A: DNA damage is defined as the deterioration of the bases or the chemical addition that modifies the…
Q: During DNA replication, DNA polymerase adds nucleotides to the: 3' end of the newly synthesized…
A: Answer: The correct answer is option (2) 3' end of the newly synthesized strand as it moves towards…
Q: What enzymatic activity is used to remove RNA primers at the end of DNA replication? Be specific and…
A: Replication is the process which is responsible for synthesis of daughter strand from the parental…
Step by step
Solved in 3 steps
- Match the following antibiotics with the drug strategy that would provide resistance to them. rifampin which blocks transcription [ Choose ] Choose] tetracycline which misaligns the beta-lactamase anticodon to its codon mutation of the TRNA binding site of the ribosome penicillin which blocks peptidoglycan creation of alternate metabolic pathway that ultimately leads to the same product synthesis mutation of RNA polymerase polymyxin which causes leakage in the porin which removes drug from periplasmic space cell membrane sulfonamide which inhibits enzyme of [Choose ] folic acid synthesis pathway Question 14 2 pts % & 5 7Antibiotics and Protein Synthesis Antibiotics are molecules produced by microorganisms as defense mechanisms. The most effective antibiotics work by interfering with essential biochemical or reproductive processes. Many antibiotics block or disrupt one or more stages in protein synthesis. Some of these are mentioned here. Tetracyclines are a family of chemically related compounds used to treat several types of bacterial infections. Tetracyclines interfere with the initiation of translation. The tetracycline molecule attaches to the small ribosomal subunit and prevents binding of the tRNA anticodon during initiation. Both eukaryotic and prokaryotic ribosomes are sensitive to the action of tetracycline, but this antibiotic cannot pass through the plasma membrane of eukaryotic cells. Because tetracycline can enter bacterial cells to inhibit protein synthesis, it will stop bacterial growth, helping the immune system fight the infection. Streptomycin is used in hospitals to treat serious bacterial infections. It binds to the small ribosomal subunit but does not prevent initiation or elongation; however, it does affect the efficiency of protein synthesis. Binding of streptomycin changes the way mRNA codons interact with the tRNA. As a result, incorrect amino acids are incorporated into the growing polypeptide chain, producing nonfunctional proteins. In addition, streptomycin causes the ribosome to randomly fall off the mRNA, preventing the synthesis of complete proteins. Puromycin is not used clinically but has played an important role in studying the mechanism of protein synthesis in the research laboratory. The puromycin molecule is the same size and shape as a tRNA/amino acid complex. When puromycin enters the ribosome, it can be incorporated into a growing polypeptide chain, stopping further synthesis because no peptide bond can be formed between puromycin and an amino acid, causing the shortened polypeptide to fall off the ribosome. Chloramphenicol was one of the first broadspectrum antibiotics introduced. Eukaryotic cells are resistant to its actions, and it was widely used to treat bacterial infections. However, its use is limited to external applications and serious infections. Chloramphenicol destroys cells in the bone marrow, the source of all blood cells. In bacteria, this antibiotic binds to the large ribosomal subunit and inhibits the formation of peptide bonds. Another antibiotic, erythromycin, also binds to the large ribosomal subunit and inhibits the movement of ribosomes along the mRNA. Almost every step of protein synthesis can be inhibited by one antibiotic or another. Work on designing new synthetic antibiotics to fight infections is based on our knowledge of how the nucleotide sequence of mRNA is converted into the amino acid sequence of a protein. Questions Why is targeting protein synthesis an effective strategy for preventing infection?A binding site for RNA polymerase is called a ________. a. gene c. codon b. promoter d. protein
- Supercoiling of DNA requires GTP as source of energy is only observed in prokaryotes is not observed in eukaryotes requires the action of topoisomerasesThe DNA region below includes the lac operon. Identify all parts (by letter) that encode PROTEINS? P O Y A 19°tAntibiotic X binds to the 50S ribosomal subunit of 70S ribosomes and blocks normal ribosomal function. Which of the following is true of this drug? It would interfere with protein synthesis in bacteria, but not affect eukaryotic ribosomes. It would interfere with peptidoglycan syntheis/repair in bacteria, but not affect eukaryotes as they lack peptidoglycan. It would interfere with mRNA transcription in bacteria and in eukaryotes. It would interfere with protein synthesis in bacteria and eukaryotes. It would interfere with mRNA transcription in bacteria, but not affect eukaryotic transcription. It would interfere with peptidoglycan syntheis/repair in bacteria, as well as in eukaryotes that possess cell walls.
- Part A What kind of inhibition is imposed on HIV protease by ritonavir? O irreversible inhibition O reversible inhibition O uncompetitive inhibition. Submit Request AnswerHow is the ribosome a target in terms of antibiotic action mechanisms? https://www.youtube.com/watch?v=IVBCrzjOl40please match the following with the right answer here are the options
- Which of the situations below will enhance microtubule growth? O addition of a drug that inhibits GDP to GTP exchange on free subunits O addition of a drug that increases the dissociation of GTP-tubulin from the polymer O addition of a drug that inhibits GTP hydrolysis in subunits incorporated into the polymer O None of the aboveThere can be more than one answerDescribe the molecule shown in the image. Evaluation at Atomic Resolution of the Role of Strain in Destabilizing the Temperature Sensitive T4 Lysozyme Mutant Arg96-->His