Defence Services Medical Academy Admission (တပ်မတော်ဆေးတက္ကသိုလ် — DSMA MMAT)

Read the passage: 'In pulmonary physiology, gas exchange across the alveolar-capillary membrane is governed primarily by passive diffusion according to Fick's law. Efficient diffusion requires an exceedingly thin tissue barrier and an expansive surface area, both of which are compromised in chronic fibrotic lung disorders.' What is the primary physiological consequence when alveolar tissue becomes fibrotic?

• AThe rate of gas diffusion decreases due to increased membrane thickness and reduced surfa…
• BThe rate of passive diffusion accelerates because fibrous tissue increases gas permeabili…
• COxygen diffusion shifts from a passive physical process to active ATP-dependent transport.
• DCarbon dioxide becomes insoluble in blood plasma and can no longer cross the capillary wa…

In the medical text 'The emergency surgical team worked to stem the hemorrhage before systemic hypotension compromised vital organ perfusion', what is the meaning of the word 'perfusion'?

• AThe passage of fluid and oxygenated blood through the circulatory system to an organ or t…
• BThe surgical incision made along the midline of the abdominal wall
• CThe accumulation of excess cerebrospinal fluid within cerebral ventricles
• DThe rapid destruction of red blood cells by bacterial endotoxins

Read the statement: 'Although antibiotic therapy rapidly eliminates susceptible bacterial populations, subtherapeutic dosing schedules foster selective pressure that facilitates the emergence of resistant strains.' What logical conclusion must be drawn regarding antibiotic administration?

• ASubtherapeutic doses are preferable because they minimize drug toxicity without causing r…
• BPatients should take antibiotics exactly as prescribed and should not reduce or skip dose…
• CAntibiotics should only be prescribed when bacterial resistance has already been definiti…
• DAll bacterial species inevitably develop resistance regardless of dosage or administratio…

Identify the sentence that correctly converts the following active sentence into the passive voice: 'The attending physician administered the intravenous antidote immediately after identifying the toxin.'

• AThe intravenous antidote was administered by the attending physician immediately after id…
• BThe intravenous antidote had administered by the attending physician immediately after id…
• CThe intravenous antidote is administered by the attending physician immediately after ide…
• DImmediately after identifying the toxin, the attending physician was administering the in…

What is the meaning of the medical prefix 'hemo-' or 'hemato-'?

• APertaining to blood
• BPertaining to liver tissue
• CPertaining to nerve fibers
• DPertaining to bone marrow

Choose the correct sentence transformation into reported speech: Direct: The chief surgeon stated, 'Sterilize all surgical instruments before opening the trauma pack.'

• AThe chief surgeon instructed us to sterilize all surgical instruments before opening the…
• BThe chief surgeon said that we must have sterilized all surgical instruments before openi…
• CThe chief surgeon says that all surgical instruments are sterilized before opening the tr…
• DThe chief surgeon asked whether all surgical instruments were being sterilized before ope…

Read the passage: 'Endocrine hormones travel systemically through the bloodstream, yet they elicit physiological responses only in specific target tissues. This selectivity is mediated by cell-surface or intracellular receptor proteins whose stereochemical configuration permits high-affinity binding exclusively to corresponding hormonal ligands.' What accounts for the tissue specificity of hormones?

• AHormones are physically directed into specific capillary networks by directional blood pr…
• BTarget tissues express unique receptor proteins with complementary stereochemical shapes…
• CTarget cells actively engulf all systemic proteins through non-selective pinocytosis.
• DHormones degrade instantaneously in all non-target organ systems prior to entering capill…

Which of the following sentences correctly uses a conditional structure to express a biological principle? 'If body temperature _______ dangerously high, critical metabolic enzymes _______ and cellular metabolism fails.'

• Arises; denature
• Brose; will denature
• Chad risen; would denature
• Dwill rise; denature

What is the antonym of the term 'acute' when describing a medical condition in the phrase 'acute myocardial infarction'?

• Achronic
• Bsevere
• Clethal
• Dfebrile

Identify the sentence with the correct subject-verb agreement in a clinical report context:

• AA battery of neurological tests was conducted to rule out intracranial hemorrhage.
• BA battery of neurological tests were conducted to rule out intracranial hemorrhage.
• CA battery of neurological tests have been conducted to rule out intracranial hemorrhage.
• DA battery of neurological tests are being conducted to rule out intracranial hemorrhage.

Read the text: 'Phagocytosis is an essential mechanism of innate immunity. Specialized leukocytes, notably neutrophils and macrophages, engulf and digest cellular debris, foreign pathogens, and apoptotic host cells using hydrolytic enzymes sequestered within lysosomes.' Which cellular organelle contains the digestive enzymes responsible for breaking down engulfed material during phagocytosis?

• AMitochondria
• BLysosomes
• CGolgi apparatus
• DEndoplasmic reticulum

Choose the most appropriate word to fill in the blank: 'Because the surgical dressing remained completely sterile and dry, there was no indication of _______ infection around the incision.'

• Alatent
• Bmanifest
• Cinnocuous
• Dbenign

Which sentence correctly uses an adverbial clause of concession to link two medical observations?

• AEven though the patient showed initial signs of hypovolemic shock, rapid fluid resuscitat…
• BThe patient showed initial signs of hypovolemic shock because rapid fluid resuscitation r…
• CThe patient showed initial signs of hypovolemic shock so that rapid fluid resuscitation r…
• DWhenever the patient showed initial signs of hypovolemic shock unless rapid fluid resusci…

What is the precise meaning of the term 'etiology' in clinical medicine?

• AThe cause, origin, or set of causes of a disease or medical condition
• BThe predicted likely outcome or recovery path of a patient
• CThe surgical excision of diseased or necrotic tissue
• DThe statistical prevalence of an infection across a geographical population

Read the statement: 'Hemoglobin exhibits positive cooperativity in binding oxygen. When an oxygen molecule binds to one of the four heme subunits, it induces a conformational change that increases the oxygen affinity of the remaining subunits.' What does this physiological mechanism ensure in active tissues versus the lungs?

• AHemoglobin binds oxygen with high affinity in the oxygen-rich alveoli and readily release…
• BHemoglobin remains completely saturated with oxygen throughout the entire circulatory cir…
• COxygen binds irreversibly to hemoglobin and cannot be transferred to myoglobin or mitocho…
• DHemoglobin preferentially binds carbon dioxide in the lungs while releasing oxygen in exp…

Select the correct sentence using the subjunctive mood in a hospital administrative protocol: 'The infection control officer recommended that the isolation ward _______ restricted to authorized staff only.'

• Abe
• Bis
• Cwas
• Dbeing

What is the medical term for high blood pressure?

• AHypertension
• BHypotension
• CHyperglycemia
• DHypoxemia

Which of the following sentences exhibits proper parallel structure in a clinical research summary?

• AThe clinical trial evaluated the drug's safety, whether it was effective, and how much it…
• BThe clinical trial evaluated the drug's safety, its therapeutic efficacy, and its overall…
• CThe clinical trial evaluated the drug's safety, to assess its therapeutic efficacy, and i…
• DThe clinical trial evaluated the drug's safety, verifying effectiveness, and cost-effecti…

What is the meaning of the word 'prophylactic' in medicine?

• AIntended to prevent disease or protect health beforehand
• BAdministered exclusively after systemic multi-organ failure has occurred
• CCausing severe allergic anaphylaxis in sensitive populations
• DDesigned to enhance biological aging in laboratory specimens

Identify the sentence that correctly uses a non-finite clause to express simultaneous action: 'While palpating the patient's abdomen, the physician noticed localized tenderness in the right lower quadrant.'

• AWhile palpating the patient's abdomen, the physician noticed localized tenderness in the…
• BWhile palpating the patient's abdomen, localized tenderness was noticed by the physician…
• CWhile the patient's abdomen palpating, localized tenderness was noticed.
• DHaving palpated the abdomen, localized tenderness was being present.

What is the clinical definition of 'ischemia'?

• AInadequate blood supply to an organ or part of the body
• BAn excess volume of red blood cells in circulation
• CThe rapid accumulation of fat in hepatic cells
• DA systemic bacterial infection of the bloodstream

Which transition phrase best introduces an illustrative example in academic writing? 'Many infectious agents mutate rapidly to evade host humoral immunity. _______, the influenza virus exhibits antigenic drift that necessitates annual vaccine reformulations.'

• AFor instance
• BOn the other hand
• CIn conclusion
• DRegardless

In the sentence 'The triage nurse prioritized the casualty whose airway was obstructed', what part of speech is 'whose'?

• APossessive relative pronoun
• BDemonstrative adjective
• CSubordinating conjunction of reason
• DPersonal subject pronoun

What is the medical meaning of the word 'edema' (oedema)?

• AAbnormal accumulation of interstitial fluid in bodily tissues causing swelling
• BA malignant neoplasm originating from epithelial cells
• CThe rapid clotting of blood within intact blood vessels
• DSevere calcification of articular joint cartilage

Identify the sentence that contains no grammatical or usage errors:

• ANeither the surgeon nor the scrub nurses were willing to compromise sterile protocol.
• BNeither the surgeon nor the scrub nurses was willing to compromise sterile protocol.
• CNeither the surgeon or the scrub nurses was willing to compromise sterile protocol.
• DNeither the surgeon nor the scrub nurses were not willing to compromise sterile protocol.

Read the passage: 'DNA polymerases possess intrinsic 3-prime to 5-prime exonuclease proofreading capability. When an incorrect nucleotide is incorporated, the enzyme stalls, excises the mismatched base, and resumes 5-prime to 3-prime polymerization. Deficiencies in this proofreading apparatus dramatically increase the somatic mutation rate.' What is the primary role of the 3-prime to 5-prime exonuclease activity?

• ATo excise mismatched nucleotides and ensure high-fidelity replication
• BTo synthesize RNA primers for initiating Okazaki fragments
• CTo unwind double-stranded DNA at the replication fork
• DTo seal phosphodiester nicks in the lagging strand backbone

What is the meaning of the medical adjective 'iatrogenic'?

• AInduced inadvertently in a patient by a physician's activity, examination, or treatment
• BGenetically inherited through an autosomal recessive allele
• CTransmitted exclusively through contaminated water or food supplies
• DNaturally occurring in wild mammalian vector populations

Which of the following sentences correctly uses negative inversion with 'Not only... but also'?

• ANot only did the surgeon stabilize the arterial tear, but she also repaired the transecte…
• BNot only the surgeon stabilized the arterial tear, but she also repaired the transected n…
• CNot only had the surgeon stabilized the arterial tear, but also she repaired the transect…
• DNot only the surgeon did stabilize the arterial tear, but she also repaired the transecte…

What is the medical meaning of the term 'sequela' (plural: 'sequelae')?

• AA pathological condition or chronic complication resulting from a prior disease or trauma
• BThe rapid surgical exploration of an acute puncture wound
• CThe microscopic staging of neoplastic epithelial cells
• DA biological assay measuring hormone concentrations in serum

Choose the sentence that correctly applies the rule distinguishing countable and uncountable quantifiers in scientific writing:

• APatients in the treatment group reported fewer side effects and experienced less discomfo…
• BPatients in the treatment group reported less side effects and experienced fewer discomfo…
• CPatients in the treatment group reported fewer side effects and experienced fewer discomf…
• DPatients in the treatment group reported less side effects and experienced less discomfor…

Read the passage: 'A clinic found that text reminders reduced missed appointments among patients who used messaging applications, while automated voice calls worked better for patients who did not. Neither method was consistently superior for every age group.' Which conclusion is best supported?

• AReminder systems are most effective when matched to how different patients communicate.
• BText messages are the best reminder method for every patient group.
• CVoice calls should replace all written appointment information.
• DAge alone determines whether a patient will miss an appointment.

Read the passage: 'After solar lamps were installed in a village library, evening attendance increased and monthly electricity spending fell. The report records the installation cost but gives no estimate of future repair expenses.' Which statement is NOT GIVEN?

• AThe lamps recovered their installation cost within two years.
• BMore people used the library in the evening after installation.
• CThe library's monthly electricity spending decreased.
• DThe report did not estimate future repair expenses.

Which of the following cellular functions is primarily carried out by the smooth endoplasmic reticulum (SER) in hepatocytes?

• ALipid and steroid hormone synthesis and detoxification of drugs and metabolic wastes
• BTranslation of secretory proteins by membrane-bound 80S ribosomes
• CAerobic synthesis of ATP via the Krebs cycle and electron transport chain
• DDigestion of phagocytosed foreign bacteria via acid hydrolases

How does a competitive enzyme inhibitor affect the kinetic parameters $V_{\max}$ and $K_m$ of an enzymatic reaction?

• A$K_m$ increases while $V_{\max}$ remains unchanged.
• B$V_{\max}$ decreases while $K_m$ remains unchanged.
• CBoth $V_{\max}$ and $K_m$ decrease proportionally.
• DBoth $V_{\max}$ and $K_m$ increase simultaneously.

Why does exposure to extreme heat (e.g., above 60 degrees Celsius) permanently inactivate most human enzymes?

• AThermal kinetic energy disrupts non-covalent hydrogen and ionic bonds, denaturing the thr…
• BHeat causes peptide bonds to spontaneously hydrolyze into individual amino acids.
• CHeat converts the active site from a proteinaceous structure into a polysaccharide.
• DHigh temperature irreversibly oxidizes all carboxyl groups into carbon dioxide gas.

Read the passage: 'Sweat cools the body only when it evaporates from the skin. In very humid air, evaporation slows even though sweating may increase.' Which sentence most accurately summarizes the contrast?

• AGreater sweating in humid air does not necessarily produce greater cooling because evapor…
• BHumid air stops the body from producing sweat, so no cooling can occur.
• CEvaporation accelerates as humidity rises, making sweat more efficient.
• DSweat cools mainly by remaining as liquid on the skin.

In mitochondrial oxidative phosphorylation, what molecule serves as the terminal electron acceptor at Complex IV (cytochrome c oxidase)?

• AMolecular oxygen (O2)
• BNAD+ (nicotinamide adenine dinucleotide)
• CCytochrome c
• DInorganic phosphate

Read the statement: 'Processed foods are not automatically unhealthy; however, products high in added sugar, salt, and saturated fat should be limited.' Which interpretation preserves the author's qualification?

• AProcessing alone does not determine healthfulness, but certain nutrient profiles justify…
• BEvery processed food should be eliminated from a balanced diet.
• CAdded sugar is harmless whenever a food has undergone little processing.
• DOnly unprocessed foods can contain excessive salt or saturated fat.

Crossing over (genetic recombination between non-sister chromatids of homologous chromosomes) occurs during which stage of meiosis?

• AProphase I
• BMetaphase I
• CAnaphase I
• DProphase II

Which plant vascular tissue is responsible for translocating organic photosynthetic solutes (such as sucrose) from source to sink tissues?

• APhloem
• BXylem
• CEpidermis
• DEndodermis

According to the cohesion-tension theory, what is the primary physical force driving the upward movement of water in tall trees?

• ANegative hydrostatic pressure (tension) generated by evaporation of water from leaf mesop…
• BPositive hydrostatic pressure generated by active ATP pumps in root epidermal cells
• CContinuous capillary siphon action driven by atmospheric pressure on root surfaces
• DActive phloem pumping of water molecules across companion cell membranes

What physiological event triggers the opening of stomatal pores in plant leaves?

• AActive influx of potassium ions (K+) into guard cells, followed by osmotic water uptake t…
• BEfflux of potassium ions and water from guard cells, causing them to become flaccid
• CAccumulation of abscisic acid (ABA) that triggers rapid cell wall contraction
• DDirect degradation of the outer guard cell wall by hydrolytic enzymes during daylight

Choose the word that best completes the sentence: 'Clear labeling can _______ the risk of a medication being mistaken for a similar package.'

• Amitigate
• Baggravate
• Cconceal
• Dduplicate

In the sentence 'The evidence was compelling but not conclusive,' which option best explains the distinction?

• AThe evidence strongly supported the claim but did not settle it beyond all reasonable dou…
• BThe evidence was weak and therefore disproved the claim.
• CThe evidence was complete, final, and incapable of another interpretation.
• DThe evidence was persuasive only because it was legally inadmissible.

Which plant hormone is primarily synthesized in apical meristems and promotes stem elongation and apical dominance while inhibiting lateral bud growth?

• AAuxin (Indole-3-acetic acid / IAA)
• BEthylene
• CAbscisic acid (ABA)
• DCytokinin

Which sentence correctly rewrites 'The lecture was so complex that several students requested a second explanation' using 'such ... that'?

• AIt was such a complex lecture that several students requested a second explanation.
• BThe lecture was such complex that several students requested a second explanation.
• CIt was a such complex lecture that several students requested a second explanation.
• DThe lecture was such a complexity that several students requested a second explanation.