Practice Test 3 - DAT Reading Comprehension
20 questions. Answer them in any order, then submit to see your score and every explanation.
- The author would most likely agree with which of the following statements?
- The passage frames the relationship between apoptosis and organismal health as primarily:
- The passage implies that carbon dating would be an unsuitable method for determining the age of...
- The author mentions the 'digital memory game' primarily in order to...
- It can be inferred from the passage that a G-protein is in an inactive state when...
- The passage suggests that gut dysbiosis may contribute to neurodegeneration through all of the following mechanisms EXCEPT:
- The passage implies that a failure in the negative selection process of T-cells could lead to...
- The passage suggests that the challenge in separating a mixture of two enantiomers arises from the fact that they...
- The passage contrasts the state of research in Parkinson's Disease (PD) and Alzheimer's Disease (AD). Which of the following statements is NOT a supported comparison or contrast?
- The passage identifies which of the following as the principal endogenous source of superoxide formation?
- Which of the following titles best summarizes the passage?
- The passage suggests that the conversion of toxic compounds into harmless substances is a direct result of:
- The author presents information about the germ-free mouse model. Which of the following conclusions drawn from this model would go beyond what the passage supports?
- Which of the following claims about the gut microbiome's characteristics in disease is NOT made in the passage?
- The author connects the term 'spongiform' to the disease process by linking it to the:
- According to the passage, the physiological signaling function of hydrogen peroxide is achieved through what specific mechanism?
- The passage suggests that the primary inadequacy of the lock-and-key model, which the induced-fit model addresses, is its failure to account for...
- As used in the passage, the term ionization most nearly means... A radiology instructor describes why some forms of radiation are called "ionizing." Atoms normally contain electrons (negatively charged particles) bound to a nucleus. When an incoming X-ray or gamma-ray photon carries enough energy, it can knock an electron out of an atom, leaving behind a charged atom called an ion. This event—electron removal that creates ions—is ionization. In living tissue, ionization can occur in water molecules, producing reactive fragments such as free radicals, which are chemically aggressive species with unpaired electrons. These radicals may attack DNA, producing strand breaks; if the cell repairs the breaks incorrectly, mutations can accumulate. Because risk depends on how much energy is deposited, clinicians quantify radiation dose and reduce unnecessary exposure by collimation (narrowing the beam), avoiding repeat scans, and choosing non-ionizing alternatives like ultrasound when appropriate. Nonetheless, ionizing radiation has clear benefits: it can reveal fractures, pneumonia, or internal hemorrhage quickly, enabling timely treatment. The passage emphasizes that the same property that makes ionizing radiation useful for imaging—its ability to interact strongly with matter—also underlies its biological hazard.
- The passage describes 'caspases' as:
- Based on the passage, one could conclude that the initial site of action for a peptide hormone is...