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- The SecB protein helps export proteins by: Explain the answer and choice the right one a.binding signal peptides for appropriate targeting b.acting as a chaperone to prevent protein folding c.cleaving signal peptides for appropriate protein folding d.acting as a chaperone to promote protein foldingCovid 19 binds to the ACE2 and TMPRS22 receptor to invade a cell. Would these be transmembrane or intracellular receptors? Select one: a. Intracellular receptor since viruses can pass through our cell membranes b. Transmembrane receptor since the virus cannot directly cross the plasma membrane of our cellsThe structure of a prodrug used for treating people with HIV virus (human immunodeficiency virus) and AIDS is shown below. This molecule is a precursor of a protease inhibitor that competitively inhibits HIV protease due to its resemblance to the proteolytic site of the enzyme. Which process in the viral life cycle does this inhibitor target directly ? Group of answer choices a. viral protein processing for making new viruses b. viral mRNA synthesis c. viral DNA integration into the host cell DNA d. viral DNA synthesis
- Poliovirus contains a protein that possesses an NLS. A drug is developed that binds and hides this sequence on the viral protein. What happens to this viral protein, in the presence of the drug? Select all that are true. a. The viral protein is now found in the cytoplasm O b. The viral protein is found in the endomembrane system Oc. The viral protein is secreted O d. The viral protein is found in the ER O e. The viral protein can now enter the nucleusWhich one is NOT a function of the Signal Recognition Particle (SRP) in protein targeting?1. peptide formation of a 9-12 amino acid long sequence2. binding to a signal sequence3. preventing elongation factors binding during translation4. guiding the ribosome to the endoplasmic reticulum5. halting translationDefine the following terms:a. SRPb. transloconc. docking proteind. SRP receptor proteine. signal peptidase
- XWhich of the following is NOT true of ITAMs? a. They are attached to the tails of the Ig b. Their phosphorylation eventually leads to a change in gene expression c. They send a signal to the interior of the cell d. ITAM is short for immunoreceptor tyrosine-based activation motifsA man was brought to the hospital showing "pneumonia"-like symptoms. They took the viral load and determined this to be the new RNA retrovirus infecting lung cells. Since antibodies were unavailable, doctors decided to treat him with drugs. Which of the following would most benefit the patient? A. Drug A is an inhibitor of the binding of 4OS with 60S ribosome of the lung cells. B. Drug B is a structural analogue of the viral peptide that binds to the receptor of the host cell enabling viral entry into the cell. C. Drug C is a polar molecule that inhibits the lytic enzymes activated upon viral infection. D. Drug D is an inducer of a proteolytic enzyme. E. Drug E is a steroid that binds at the regulatory site of a gene causing the synthesis of a repressor that binds at the gene site for the receptor.
- How is it verified that the Lc chain formed is functional? a. translation is carried out b. the complete receptor (BCR) is formed c. join the Hc chain d. binds to an antigenPlant junctions Choose. ion Bacteriophages can recognize the host cell by: O a. Glycoprotein that recognizes a specific protein on a bacterial cell O b. Binding of a viral protein to a receptor on the bacteria cell using the lock and key fit put of O c. Glycoproteins that help the virus to bind to a receptor protein on a bacterial cell O d. Binding of the viral receptor to a protein on a bacteria cell using the lock and key fit un e. Viral envelop that fuses with the plasma membrane of a bacterial cell estion Estrogen is a female hormone that helps develop and maintain the reproductive system. Estrogen is produced in Type here to searchThe surface proteins on the lipid envelope of the hepatitis B virus specifically bind to receptor proteins on the surface of human liver cells. This viral‑host protein interaction allows the hepatitis B virus to infect human liver cells. A hepatitis B virus strain has been genetically modified so that the lipid envelope contains gp120 in addition to the regular surface proteins. What will the hepatitis B virus be able to infect? Select all that apply. human T cells human liver cells HIV bacterial cells
