Which of the following is NOT a function of structural proteins? O a. Initiate fusion with the cell membrane O b. Initiate viral protein translation O. Bind host receptors to mediate entry O d. Recognize and help package the genome
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Step by step
Solved in 3 steps
- 1. DNA → CCT CTT ATG ACA CGG AGG GTA CGC TẠT TCT ATG TAA ACA CGG TTG CGA TECATA AT€ mRNA → TRNA →CC protein →Transfer RNA is the molecule thata. contributes to the structure of ribosomesb. adapts the genetic code to protein structurec. transfers the DNA code to mRNAd. provides the master code for amino acidsWhich of the following statement(s) relating to the cell nucleus is true? a. all body cells are nucleatedb. the nuclear envelope is non-porousc. contains nucleoli that are involves in tRNA synthesisd. all of the abovee. none of the above
- 8) Which of these describes the function of RNA polymerase? A. Amplifies the “message" by making multiple copies of an mRNA molecule after it has been transcribed from DNA B. Converts a protein sequence to mRNAWhich of the following sequences correctly lists in orderthe steps involved in the incorporation of aproteinaceous molecule within a cell?a. protein synthesis of the protein on the ribosome;modification in the Golgi apparatus; packaging inthe endoplasmic reticulum; tagging in the vesicleb. synthesis of the protein on the lysosome; tagging inthe Golgi; packaging in the vesicle; distribution inthe endoplasmic reticulumc. synthesis of the protein on the ribosome;modification in the endoplasmic reticulum; taggingin the Golgi; distribution via the vesicled. synthesis of the protein on the lysosome; packagingin the vesicle; distribution via the Golgi; tagging inthe endoplasmic reticulumWhich of the following is not a location of ribosomes?a. on the nuclear membraneb. free in the cytoplasmc. strung along messenger RNAd. inside the rough ER
- The following sequence represents triplets on DNA:TAC CAG ATA CAC TCC CCT GCG ACT a. Give the mRNA codons and tRNA anticodons that correspondwith this sequence, and then give the sequence of amino acids inthe polypeptide.b. Provide a differentWhich of the following statements about ribosomes is correct? * a. the number of ribosomes in a cell seldom exceeds 50 b. the active site of a ribosome contains mostly protein molecules c. structurally, ribosomes have two rRNA- protein subinuts d. no correct response What is the complementary hnRNA base sequence produced from the DNA base sequence 5' C-T-A-T-A-C 3' ? * a. 3' C-T-A-G-A-T 5' b. 3' C-G-G-A-T-A 5' c. 3' G-A-U-A-U-G 5' d. 3' G-A-T-A-T-G 5' The product of the first phase in protein synthesis is * a. DNA molecules b. RNA molecules c. both RNA and DNA molecules d. neither RNA and DNA moleculesRNA molecules differ from DNA molecules in that they * a. are single stranded rather double stranded b. contain five different bases rather than four c. contain a greater number of nucleotide units d. no correct response Which of the following is definitely an incorrect codon-amino acid pairing? * UUU-UUC and Phe-Phe ACU-AAU and Thr-Asn GCC-GCC and Ala-Gly ACU-GUA and Val-Pro Which of the following statements concerning codons is incorrect? * a. they are found within mRNA molecules b. they specify base sequence in terms of four-nucleotide units c. there are 64 of them d. no correct response
- The African swine fever virus has two membrane bilayers around the outside of the virus. The outer layer is from the host cell that the virus infects—it takes part of the host membrane with it as it leaves the cell. This membrane then fuses with the next cell the virus infects, and it is known that cholesterol is required in the membrane of the cell being infected in order for the virus to successfully infect the cell. Which of the following is the best explanation for why cholesterol would be required in the membrane of the cell the virus is infecting? Explain your choice in 25 words or less. Viral proteins may not have the correct conformation if the host membrane is less fluid due to lower cholesterol levels The cholesterol forms a channel through the membrane that allows the virus to enter the cell, and without cholesterol the virus cannot enter the cell The cholesterol disrupts a small portion of the hydrophobic core of the membrane to allow the virus to enter the cell, and…t-RNA brings A. Amino acids at the site of protein synthesis on ribosomes B. r-RNA to ribosomes C. m-RNA out of nucleusWhich of the following is incorrect? a. Amino acids may have one or more triplet codes or codons b. Translation refers to the synthesis of RNA DNA replication is possible due to the complementarity of the two strands of DNA Od. A mutated gene can cause disease O c.