ATI RN
Immune System Quiz Quizlet Questions
Question 1 of 5
The Calvin cycle:
Correct Answer: D
Rationale: The Calvin cycle is a series of biochemical reactions that take place in the stroma of chloroplasts during photosynthesis. It occurs in the dark phase (without direct light requirement), making choice D correct. Choice A is incorrect because the Calvin cycle is a C3 pathway, not C5. Choice B is incorrect because not all photoautotrophic microorganisms use the Calvin cycle; some use alternative pathways. Choice C is incorrect because C4 pathway is a different photosynthetic pathway that occurs in certain plants to minimize photorespiration.
Question 2 of 5
DNA ligase catalyzes reactions that facilitate the formation of
Correct Answer: B
Rationale: DNA ligase catalyzes the formation of phosphodiester bonds between the sugar-phosphate backbone of DNA strands. The correct answer is B because DNA ligase specifically acts on these phosphodiester bonds to seal nicks in the DNA molecule during processes like DNA replication and repair. Option A, ester bonds, are not formed by DNA ligase. Option C, phosphohydroxyl bonds, is not a recognized type of bond in DNA ligation. Option D, amide bonds, are not formed by DNA ligase either. Thus, the correct answer is B as it aligns with the known function of DNA ligase.
Question 3 of 5
What outcome would you least expect if the amount of template in a PCR fell significantly below the optimal amount?
Correct Answer: B
Rationale: The correct answer is B: increased yield. If the amount of template in a PCR falls significantly below the optimal amount, it would be expected to result in a decreased yield rather than an increased yield. The template is essential for DNA amplification in PCR, and a lower amount would lead to fewer copies being produced. Non-specific amplification (choice A) can occur if there is too much template or incorrect primer annealing. Allelic drop-out (choice C) is likely to happen if there is insufficient template present to amplify all alleles. Longer targets amplifying poorly or failing (choice D) is also a common outcome when template concentration is low. Therefore, the least expected outcome would be an increased yield as that goes against the principle of PCR amplification.
Question 4 of 5
Which of the following lymphoid tissues has both hematopoietic and immune functions and acts as an emergency reservoir of blood and filters the blood as well?
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 5 of 5
Antihistamines are used cautiously in older men with prostatic hypertrophy for which of the following reasons?
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.