BONUS (2 pts) - Synthetic retinoids are derived from vitamin A and are classified into three generations with the third generation retinoids being more rigid and specific (selective) for retinoid receptors. Question 14 options: a) Trueb) False
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Synthetic retinoids are indeed derived from vitamin A and are categorized into three generations based on their chemical structure and receptor specificity. Show more…
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Luke H.
QUESTION 18 Inadequate stomach acid can result in Vitamin B12 deficiency. True False QUESTION 19 Coenzyme-A is the coenzyme form of which vitamin? a. Riboflavin b. Thiamin c. Biotin d. Pantothenic Acid QUESTION 20 Babies and young children require adequate amounts of which of the following to prevent rickets and skull malformation? a. Retinol b. Folate c. Alpha-tocopherol d. Vitamin D QUESTION 21 Fragile blood vessels, pinpoint hemorrhages, bleeding gums, bone and tooth deformity, and skin lesions are clinical signs of which deficiency disease? a. Pellagra b. Ariboflavinosis c. Pernicious Anemia d. Scurvy QUESTION 22 Which of the following is a lipid-soluble antioxidant, especially within the cell membrane? a. Vitamin A b. Vitamin E (d-alpha tocopherol) c. Riboflavin d. Vitamin C QUESTION 23 Which of the following is not a retinoid? a. Retinoic acid b. Beta-carotene c. Retinol d. Retinal QUESTION 24 Which vitamin functions as a water-soluble antioxidant in environments such as the inside of the cell? a. Vitamin E b. Vitamin C (Ascorbic Acid) c. Pantothenic Acid d. Retinol QUESTION 25 Scurvy is a deformation in collagen. True False QUESTION 26 Beta-carotene is only found in animal products. True False QUESTION 27 Neural tube defect in the fetus can result from folate deficiency. True False QUESTION 28 Which of the following vitamins is required for blood clotting as well as maintenance of bones? a. Vitamin E b. Vitamin A c. Vitamin K d. Biotin QUESTION 29 Which of the following is a vitamin for humans, but not for pigs and many other animals? a. Vitamin A b. Vitamin B6 c. Vitamin B12 d. Vitamin C (Ascorbic Acid) QUESTION 30 Which of the following is activated by vitamin B12? a. Folate b. Biotin c. Riboflavin d. Thiamin QUESTION 31 Pernicious anemia results from deficiency/malabsorption of which of the following? a. Vitamin B6 b. Riboflavin c. Vitamin B12 d. Niacin QUESTION 32 Numbness and tingling in the extremities might be a symptom of? a. Thiamin excess b. B6 deficiency only, not excess c. Vitamin K deficiency d. B6 excess or deficiency QUESTION 33 Large supplemental doses of Vitamin B6 are non-toxic as it is a water-soluble vitamin. True False QUESTION 34 Night blindness is one of the first signs of a deficiency of? a. Folate b. Vitamin K c. Vitamin C d. Vitamin A
Sri K.
26. Isotretinoin is a retinoid derivative of vitamin A used in the treatment of severe recalcitrant acne. What is the degree of substitution of the encircled alkene functional group in its structure? A. monosubstituted B. disubstituted C. trisubstituted D. tetrasubstituted
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