OptoPrep NBEO Practice Questions& answers 2023/24 | with complete solution

OptoPrep NBEO Practice Questions& answers 2023/24 | with complete solution If a thin lens with an index of 1.5 has a dioptric power of +4.00 in air, what is its power if placed in water? A) +1.18 diopters B) +11.76 diopters C) +1.36 diopters D) +4.00 diopters - C) +1.36 diopters Alpha helices and beta sheets are considered which level of protein structure? A) Quaternary B) Primary C) Tertiary D) Secondary - D) Secondary An amphipathic molecule will react in what manner when exposed to water? A) It will completely dissolve B) It will form a gas C) It will combust D) It will form micelles - D) It will form micelles Coenzyme Q, vitamins A, D, E and K, and cholesterol are all derived from which of the following lipids? A) Triglycerides B) Phospholipids C) Sphingolipids D) Isoprenes and terpenes - D) Isoprenes and terpenes Dietary triglycerides are metabolized primarily by which organ of the body? A) Kidney B) Liver and gall bladder C) Intestine D) Stomach - C) Intestine Fatty acid synthesis is activated during which of the following situations? A) Decreased levels of citrate and glucagon, increased levels of insulin B) Increased levels of citrate and insulin, decreased levels of glucagon C) Decreased levels of citrate and insulin, increased levels of glucagon D) Increased levels of citrate and glucagon, decreased levels of insulin E) Increased levels of citrate, decreased levels of glucagon and insulin F) Decreased levels of citrate, increased levels of glucagon and insulin - B) Increased levels of citrate and insulin, decreased levels of glucagon Glycolysis occurs at which location within a eukaryotic cell? A) Nucleus B) Cellular membrane C) Cytosol D) Mitochondrion E) Endoplasmic Reticulum - C) Cytosol A 10-year old child presents in your office with a unilateral follicular conjunctivitis along with ipsilateral adenopathy. You correctly diagnose oculoglandular syndrome. Because it is the most common etiology, which of the following causes are you MOST likely to suspect? A) Measles B) Cat-scratch disease C) Coccidioidomycosis D) Diabetes E) Toxoplasmosis - B) Cat-scratch disease A 24-year old female patient is seen at your office and reports that her eyes have been red for a few days. Biomicroscopy reveals bilateral diffuse superficial punctate keratitis (SPK) that stains with sodium fluorescein with no mucopurulent discharge. Based ONLY upon the corneal staining pattern, what is the MOST likely origin of her condition? A) Dry eyes B) Viral C) Foreign Body D) Bacterial - B) Viral A 32-year old male is seen at your office and is in a fair amount of pain. He can barely open his right eye and reports that the pain began this morning when he first opened his eyes. His medical history is unremarkable, and he does not wear contact lenses. His ocular history is remarkable for a mild corneal abrasion of the right eye from a tree branch that occurred over a month ago but had since healed. Biomicroscopy (after instillation of a topical anesthetic) reveals an epithelial defect 1.5mm wide and 1.0mm long that stains with sodium fluorescein. There is no anterior chamber reaction and no visible discharge. What is the MOST appropriate diagnosis? A) Corneal ulcer (microbial keratitis) B) Epithelial basement membrane dystrophy C) Corneal abrasion D) Recurrent corneal abrasion - D) Recurrent corneal abrasion A 42-year old construction worker presents to you with a history of getting plaster in his right