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NBME CBSE Exam 2025: Comprehensive Basic Science Self-Assessment Test Bank & Study Guide

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Prepare for the National Board of Medical Examiners (NBME) Comprehensive Basic Science Exam (CBSE) with the newest 2025 actual test bank. This PDF includes practice questions, detailed rationales, and a comprehensive review of anatomy, physiology, biochemistry, pathology, pharmacology, and microbiology for USMLE Step 1 readiness and medical school progression.

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NBME CBSE EXAM NEWEST 2025 ACTUAL EXAM TEST

BANK| COMPLETE REAL EXAM QUESTIONS AND

CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)

ALREADY GRADED A+| NBME CBSE EXAM PREP 2025

(BRAND NEW!!)

70yo M dies in a motor vehicle collision. Was undergoing

evaluation for occult blood in the stool. Photo of transverse colon

shown. Dx? ........ANSWER......Tubular adenoma

38yo M with 1-week hx of watery, itchy eyes and a runny nose.

Physical shows inflamed nasal mucosa. No congestion in lower

lung. Pharmacotherapy? ........ANSWER......Loratadine

16yo girl with 3-day hx of fever, nonproductive cough, and

fatigue. T 38.3, P 88/min, BP 102-70. PE shows pale

conjunctivae. CXR shows bilateral interstitial infiltrates. Blood

spontaenously agglutinates while awaiting transport to the

,Page 2 of 452


laboratory. Antibody isotypes causing agglutination?

........ANSWER......IgM

24yo M with small tender blisters on his penis 3 days after

unprotected sex. Photograph shown. Causal agent?

........ANSWER......HSV-2

42yo F with 3-year hx of an intermittent facial rash, including the

forehead, eyelids, nose, and cheeks. Rash seems to be getting

worse since she moved from New York to Florida last year. Spicy

foods precipitate a flushing reaction that seems to exacerbate

the rash. PE shows erythema over the nose and cheeks, with

scattered telangiectasias and a few papules. Dx?

........ANSWER......Rosacea

53yo M returned from Africa, has fever, headache, and

abdominal discomfort. Received appropriate vaccinations prior

to the trip. T 39.4C. A wright-stained peripheral smear shown.

Dx? ........ANSWER......Malaria

,Page 3 of 452


68yo F with T2DM and hypertension that has been poorly

controlled despite hydrochlorothiazide treatment. BP 150/96,

Labs show serum glucose concentration of 130 and proteinuria. In

addition to current Rx, which is most appropriate

pharmacotherapy? ........ANSWER......Lisinopril

66yo M with stage IV colon cancer with 3-day hx of severe

diarrhea after receiving chemotherapy with fluorouracil,

leucovorin, and Irinotecan. prescribed opioid antidiarrheal agent

with no CNS effects. Which med? ........ANSWER......Loperamide

35yo M in ED with 2-hour hx of sever fatigue and dizziness. Had

profuse, watery diarrhea for 8 hours despite a lack of oral

intake. Recently returned from a medical relief trip to a remove

village in Honduras. T 36.7 C, P 122/min, BP 90/50. PE shows

dry skin and decreased capillary refill. Stool for occult blood is

negative; stool is gray and turbid. Gram stain shows gram-

, Page 4 of 452


negative, comma-shaped bacteria; no erythrocytes of leukocytes.

MOA of toxin? ........ANSWER......Activation of adenylyl cyclase

59yo F with gradual onset of lack of muscle control in her left

arm and leg. Sx 1 mo ago after dx with metastatic breast

cancer. PE shows ataxia of left upper and lower extremities.

Muscle strength, DTR, sensation, proprioception normal.

Metastatic tumor in which location? ........ANSWER......cerebellum

Newborn delivered at 38 weeks' gestation weighs 1800 g. PE

shows petechial rash, microcephaly, and hepatosplenomegaly.

Serologic test for CMV: IgG + in mother, + in newborn; IGM - in

mother, + in newborn. Explanation? ........ANSWER......Congenital

cytomegalovirus infection

Female newborn is delivered at 38 weeks' gestation. Apgar 8

and 8 at 1/5 min. PE shows a bulging, fluod0filled mass

approximately 5 cm in diameter in the midline over the

lumbosacral region. No spontaneous movements of the lower

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