ATI RN
Immune System Test Quizlet Questions
Question 1 of 5
Which of the following is not a Covid-19 vaccine?
Correct Answer: A
Rationale: Step-by-step rationale: 1. Nuvaxovid is not a known Covid-19 vaccine. 2. Covovax and Moderna are both established Covid-19 vaccines. 3. "None of the above" includes all listed options, so it is not the correct answer. 4. Therefore, the correct answer is A: Nuvaxovid, as it is not a recognized Covid-19 vaccine.
Question 2 of 5
The nurse is reviewing the immune system with a patient newly diagnosed with an autoimmune disorder. What should the nurse explain as the purpose of antibodies?
Correct Answer: D
Rationale: The correct answer is D. Antibodies attach to antigens to label them for destruction. This is crucial in the immune response to identify and mark harmful substances for elimination. Choice A is incorrect because antibodies do not destroy antigens directly. Choice B is incorrect as antibodies are specific to particular antigens. Choice C is incorrect as blood type specificity is determined by different antigens, not antibodies.
Question 3 of 5
Ribosomes associated with cells or organelles have a certain size, which is expressed in Svedberg units. Which associations are incorrect?
Correct Answer: A
Rationale: The correct answer is A because cyanobacteria have ribosomes measured in 70s, not 80s. Ribosomes in prokaryotes are either 70s (composed of 50s and 30s subunits) or 80s in eukaryotes (60s and 40s subunits). Choices B, C, and D are incorrect because chloroplasts, photosynthetic bacteria, and green algal cytoplasm all have ribosomes measured in 70s or 80s, consistent with their cell types.
Question 4 of 5
A small molecule that combines with a specific allosteric protein so that both prevent RNA polymerase activity is called a(n):
Correct Answer: C
Rationale: The correct answer is C: corepressor. A corepressor is a small molecule that binds to an allosteric protein to inhibit its activity. In this case, the corepressor prevents RNA polymerase activity. The other choices are incorrect because: A: Inducer activates gene expression. B: Repressor inhibits gene expression by binding to DNA. D: Leader is not a term related to allosteric regulation.
Question 5 of 5
The oxidation-reduction pairs X/XHâ‚‚ and Y/YHâ‚‚ have reduction potentials of -50 and +75 millivolts, respectively. This means that electrons would most likely be removed from ______ to reduce ______.
Correct Answer: A
Rationale: The correct answer is A: XHâ‚‚, Y. This is because the reduction potential of -50 mV for X/XHâ‚‚ indicates that X is more likely to lose electrons compared to Y with a reduction potential of +75 mV. Therefore, electrons would be removed from XHâ‚‚ (X) to reduce Y. Choice B is incorrect because Y has a higher reduction potential than XHâ‚‚, so electrons would not be removed from Y to reduce XHâ‚‚. Choices C and D are also incorrect as they do not consider the relative reduction potentials of X/XHâ‚‚ and Y/YHâ‚‚.