]> 2026-07-31T07:28:14+00:00 WBR0340 0 en Phospholipase Phospholipases are membrane proteins that hydrolyzes phospholipids. Interferons do not induce an antiviral response by activating phospholipases. Endonuclease Endonucleases are enzymes that recognize specific base sequences in DNA and cleave a polynucleotide chain. Interferons do not induce an antiviral response by activating endonucleases. Protease Proteases hydrolyze the peptide bonds of amino acids. Interferons do not induce an antiviral response by activating proteases. Deoxyribonuclease Deoxyribonucleases are endonucleases that catalyze the cleavage of phosphodiester bonds in the DNA backbone. Interferons do not induce an antiviral response by activating deoxyribonuclease. Ribonuclease Ribonucleases are enzymes that catalyze the degradation of RNA. Interferons induce an antiviral state within the target cells by activating RNase L, a ribonuclease which breaks down viral RNA. Immunology In order to study cellular responses, a student exposes two groups of mice to an influenza virus infection: A control group with intact bone marrow and another group with completely ablated bone marrow. The student observes that in the control group, concentrations of an intracellular protein (Protein A) in muscle cells rise in parallel with the intracellular activity of 2'-5′ oligoadenylate synthetase and the serum concentration of IFN-α/β. In contrast, the influenza viral load is much more elevated in the group with the ablated bone marrow, while no rise in protein A concentrations is observed. Which of the following is the most likely function of protein A? E General Principles 2020-10-28T00:14:10Z 2459150.509838 WBR0340