ATI RN
Immune System Disorders Quizlet Questions
Question 1 of 5
NAD and FAD are hydrogen carriers, but cytochromes are electron carriers in bacteria. What happens to the protons (Hâº) in electron transport chains?
Correct Answer: D
Rationale: The correct answer is D because in the electron transport chain, protons (H⁺) are pumped across the membrane to create a proton gradient. This gradient is utilized by ATP synthase to produce ATP. Therefore, protons go into solution outside the cytoplasmic membrane. Choices A and B are incorrect because protons do not simply stay in the cytoplasm or get taken back by NAD and FAD. Choice C is incorrect as protons do not directly form water when carried by cytochromes.
Question 2 of 5
If you were to observe the activity of methylated DNA, you would expect it to
Correct Answer: C
Rationale: The correct answer is C because methylation of DNA typically results in the inhibition or slowing down of transcription. Methylated DNA attracts proteins that bind to it, preventing transcription factors from accessing the DNA and initiating transcription. This interference with the transcription process leads to gene silencing or reduced gene expression. A: DNA unwinding in preparation for protein synthesis is unrelated to DNA methylation. B: Continuous replication is not a typical consequence of DNA methylation. D: Methylation does not directly induce protein synthesis but rather affects transcription by influencing gene expression.
Question 3 of 5
The reason for using Taq polymerase for PCR is that
Correct Answer: D
Rationale: The correct answer is D because Taq polymerase is heat-stable, allowing it to withstand the high temperatures used in PCR cycles without denaturing. This heat stability is crucial for the repeated heating and cooling cycles in PCR. Choice A is incorrect because Taq polymerase does not need to be complementary to primers. Choice B is incorrect because the amount needed is not the main reason for using Taq polymerase. Choice C is incorrect because binding affinity to primers is not the primary reason for using Taq polymerase.
Question 4 of 5
Which of the following white blood cells is small,present in blood and migrates to tissue as necessary?
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 5 of 5
Which of the following is the most important factor in the nursing management of a client with CFS?
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.