Nokea
In aerobic respiration, how many ATP molecules are produced per molecule of FADH2?
- A. 1
- B. 2
- C. 3
- D. 4
Correct Answer: B
Rationale: The correct answer is B: 2. During aerobic respiration, each molecule of FADH2 produces 2 ATP molecules. FADH2 enters the electron transport chain and contributes to the generation of ATP. Choice A (1), Choice C (3), and Choice D (4) are incorrect because FADH2 specifically yields 2 ATP molecules per molecule in the process of aerobic respiration.
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Which of the following is a genetic condition that affects the respiratory system?
- A. Asthma
- B. Cystic fibrosis
- C. Mycosis
- D. Surfactant Deficiency
Correct Answer: B
Rationale: The correct answer is B, Cystic fibrosis. Cystic fibrosis is a genetic disorder that primarily affects the respiratory and digestive systems. It leads to the production of thick mucus in the lungs, causing breathing difficulties and increasing the risk of respiratory infections. Choice A, Asthma, is a chronic respiratory condition characterized by inflammation and narrowing of the airways, but it is not a genetic condition. Choice C, Mycosis, refers to fungal infections and is not a genetic condition specifically affecting the respiratory system. Choice D, Surfactant Deficiency, is a condition related to respiratory distress syndrome in newborns and is not a genetic disorder affecting the respiratory system in general.
Which of the following is an example of Mendelian inheritance?
- A. Incomplete Dominance
- B. Polygenic Alleles
- C. Combination Inheritance
- D. Recessive Inheritance
Correct Answer: D
Rationale: The correct answer is D, 'Recessive Inheritance.' Mendelian inheritance involves traits controlled by single genes with dominant and recessive alleles. Incomplete dominance (choice A) is a non-Mendelian inheritance pattern where the heterozygous phenotype is a blend of the two homozygous phenotypes. Polygenic alleles (choice B) involve multiple genes contributing to a single trait, not following Mendelian principles. Combination inheritance (choice C) is not a recognized term in genetics and does not describe Mendelian inheritance patterns.
Which of the following statements is true about an allergic reaction?
- A. An allergic reaction, such as hives or wheezing, results from overactive body systems such as the integumentary and respiratory systems.
- B. An allergic reaction is a result of overactive B-cells in the body that release various immunoglobulins.
- C. An allergic reaction is caused by overactive mast cells in the body, which are stimulated by Immunoglobulin E.
- D. An allergic reaction involves substances like histamine, keratin, and collagen.
Correct Answer: C
Rationale: The correct answer is C. Mast cells are responsible for releasing histamine and other chemicals during an allergic response. Choice A is incorrect because hives and wheezing are symptoms of an allergic reaction, not the causes. Choice B is incorrect as B-cells are not directly involved in allergic reactions. Choice D is incorrect as keratin and collagen are not typically involved in allergic reactions, and histamine is released by mast cells.
What is the role of platelets in the blood?
- A. Transport oxygen
- B. Fight infection
- C. Produce antibodies
- D. Clot blood
Correct Answer: D
Rationale: Platelets play a crucial role in blood clotting by forming clots to help stop bleeding. While red blood cells transport oxygen, white blood cells fight infection, and immune cells produce antibodies, platelets specifically function to prevent excessive bleeding by forming clots. Therefore, the correct answer is D. Choices A, B, and C are incorrect as they describe functions of other components of the blood, not platelets.
A researcher wants to conduct qualitative research. Which method should they use?
- A. Collecting patient narratives
- B. Tracking the dosage of a drug and its blood levels in the patient
- C. Observing a patient's physical changes
- D. Writing journal notes about the research experience
Correct Answer: A
Rationale: Qualitative research focuses on gathering non-numerical, descriptive data to explore experiences, behaviors, or perspectives. Collecting patient narratives aligns with qualitative research as it involves capturing detailed accounts of individuals' experiences or viewpoints. Choices B, C, and D involve more quantitative approaches by focusing on measurable quantities, observations, or structured note-taking, which are not characteristic of qualitative research methods.