Description : Anti-oxidant activity is present in (A) β-Carotene (B) Retinol (C) Retinoic acid (D) All of these
Last Answer : (A) β-Carotene
Description : One international Unit of vitamin A is the activity present in (A) 0.3 µg of β-Carotene (B) 0.3 µg of retinol (C) 0.6 µg of retinoic acid (D) All of these
Last Answer : Answer : B
Description : Retinoic acid can (A) Act as a photo receptor (B) Support growth and differentiation (C) Act as an anti-oxidant (D) None of these
Description : The following form of vitamin A is used in the visual cycle: (A) Retinol (B) Retinoic acid (C) Retinaldehyde (D) Retinyl acetate
Last Answer : Answer : C
Description : On exposure to light rhodopsin forms (A) All trans-retinal (B) Cis-retinal (C) Retinol (D) Retinoic acid
Last Answer : Answer : A
Description : The non-protein part of rhodopsin is (A) Retinal (B) Retinol (C) Carotene (D) Repsin
Description : Non-protein part of rhodopsin is (A) Retinal (B) Retinol (C) Carotene (D) Repsin
Description : Retinol and Retinol binding protein are bound with this protein: (A) Albumin (B) Prealbumin (C) α-globulin (D) β-globulin
Description : Retinol and retinol –binding protein (RBP) bound with this protein: (A) Albumin (B) Prealbumin (C) α2-globulin (D) β-globulin
Description : Retinol is transported to the blood as retinol attached to (A) α1-globulin (B) α2-globulin (C) β-globulin (D) γ-globulin
Description : Retinol is transported in blood bound to (A) Aporetinol binding protein (B) α2-Globulin (C) β-Globulin (D) Albumin
Description : Conversion of β-carotene into retinal requires the presence of (A) β-Carotene dioxygenase (B) Bile salts (C) Molecular oxygen (D) All of these
Last Answer : Answer : D
Description : Two molecules of vitamin A can be formed from 1 molecule of (A) α-Carotene (B) β-Carotene (C) γ-Carotene (D) All of these
Description : Precursor of Vitamin A is (A) α-Carotene (B) β-Carotene (C) γ-Carotene (D) All of these VITAMINS 121
Description : The molecule of vitamin A1 contains (A) Benzene ring (B) β-Ionone ring (C) β-Carotene ring (D) None of these
Description : β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase (C) Hydroxylase (D) Transferase
Description : This vitamin acts as anti oxidant. (A) Vitamin A (B) Vitamin D (C) Vitamin E (D) Vitamin K
Description : This vitamin acts as anti-oxidant: (A) Vitamin A (B) Vitamin D (C) Vitamin E (D) Vitamin K
Description : Retinoic acid is involved in the synthesis of (A) Rhodopsin (B) Iodopsin (C) Porphyrinopsin (D) Glycoproteins
Description : Retinal is converted into retinoic acid in the presence of (A) Retinal oxidase (B) Retinal carboxylase (C) Retinene reductase(D) Spontaneously
Description : Retinoic acid participates in the synthesis of (A) Iodopsin (B) Rhodopsin (C) Glycoprotein (D) Cardiolipin
Description : The organism commonly used for the production of carotene is/ are β A- Phycomycesblakesleeanus B- Phycomycesblakesleeanus C- Blakesleatrispora D- all of these
Last Answer : all of these
Description : Pseudomonas aeruginosa forms a blue water soluble pigment called A-pyocyanin B- chlororaphin C- pyoverdin D-β-carotene
Last Answer : pyocyanin
Description : β-Carotene, precursor of vitamin A, is oxidatively cleaved by (A) β-Carotene dioxygenase (B) Oxygenase \ (C) Hydroxylase (D) Transferase
Last Answer : (A) β-Carotene dioxygenase
Description : Which of the following is an anti oxidant? (1 ) Vitamin-C (2) Vitamin-K (3) Vitamin-B (4) Vitarnin-D
Last Answer : (1 ) Vitamin-C Explanation: Vitamin B12 contains cobalt. Deficiency of Vitamin B12 causes pernicious anaemia and inflammation of tongue and mouth. Vitamin A. Vitamin C and Vitamin E are antioxidants.
Description : Which of the following is an anti oxidant ? (1) Vitamin-C (2) Vitamin-K (3) Vitamin-B (4) Vitamin-D
Last Answer : Vitamin-C
Description : Primase activity is present in (A) DNA polymerase II (B) DNA polymerase α (C) DNA polymerase β (D) DNA polymerase δ
Description : Tyrosine kinase activity is present in (A) α-Adrenergic receptors (B) β-Adrenergic receptors (C) Cholinergic receptors (D) Insulin receptors
Description : Retinol isomerase is present in (A) Retina (B) Liver (C) Both (A) and (B) (D) None of these
Description : Dictary deficiency of this vitamin leads to night blindness: (A) Retinol (B) Niacin (C) Ascorbic acid (D) Cholecalciferol VITAMINS 125
Description : Milk is a good source of (A) Proteins, calcium and iron (B) Proteins, calcium and ascorbic acid (C) Proteins, lactose and retinol (D) Proteins, lactose and essential fatty acids
Description : The drug, Interleukin-2, is an example of which type of biologic response modifier? a) Cytokine Other cytokines include interferon alfa and filgrastim. b) Monoclonal antibodies Monoclonal ... an example of a retinoid. d) Antimetabolites Antimetabolites are cell cycle-specific antineoplastic agents.
Last Answer : a) Cytokine Other cytokines include interferon alfa and filgrastim.
Description : In what vitamin would retinoic acid be found?
Last Answer : ANSWER: VITAMIN A
Description : The more positive the E0, the greater the tendency of the oxidant member of that pair to (A) Lose electrons (B) Gain electrons (C) Lose (or) gain electrons (D) Lose and gain electrons
Last Answer : B
Description : Which amino acid is present at 6th position of β-chain of Hbs instead of glutamate in HbA? (A) Cysteine (B) Valine (C) Aspartate (D) Glutamate
Description : Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action
Description : Which of the following statement regarding β-oxidation is true? (A) Requires β-ketoacyl CoA as a substrate (B) Forms CoA thioesters (C) Requires GTP for its activity (D) Yields acetyl CoA as a product
Description : Retina contains this photo sensitive pigment. (A) Rhodopsin (B) Opsin (C) Retinol (D) Malanin
Description : Retina contains this photosensitive pigment: (A) Rhodopsin (B) Opsin (C) Retinol (D) Melanin
Description : Retinal is reduced to retinol by retinene reductase in presence of the coenzyme (A) NAD+ (B) NADP+ (C) NADH + H+ (D) NADPH + H+
Description : Conversion of all-trans-retinal into alltrans-retinol requires (A) NAD (B) NADH (C) NADP (D) NADPH
Description : Both Wernicke’s disease and beriberi can be reversed by administrating (A) Retinol (B) Thiamin (C) Pyridoxine (D) Vitamin B12
Description : Dicoumarol is antagonist to (A) Riboflavin (B) Retinol (C) Menadione (D) Tocopherol
Description : Retinol and retinal are interconverted requiring dehydrogenase or reductase in the presence of (A) NAD or NADP (B) NADH + H+ (C) NADPH (D) FAD
Description : Retinal is reduced to retinol in intestinal mucosa by a specific retinaldehyde reductase utilising (A) NADPH + H+ (B) FAD (C) NAD (D) NADH + H+
Description : Milk is poor in (A) Cholesterol (B) Retinol (C) Calcium (D) Iron
Description : Which of the following is known as Vitamin B1? (1) Retinol (2) Thiamin (3) Riboflavin (4) Ascorbic Acid
Last Answer : (2) Thiamin Explanation: Thiamine also called vitamin B 1, named as the "thio-vitamine" ("sulfurcontaining vitamin") is a watersoluble vitamin of the B complex. First named aneurin for ... the generic descriptor name vitamin B 1. Its phosphate derivatives are involved in many cellular processes.
Description : Which one of the following is a fat-soluble vitamin and its related deficiency disease? (a) Retinol - Xerophthalmia (b) Cobalamine - Beri-beri (c) Calciferol - Pellagra (d) Ascorbic acid - Scurvy
Last Answer : (a) Retinol - Xerophthalmia
Description : ___________ is contraindicated during pregnancy due to its Teratogenicity. a) Folic acid b) Calcium c) Retinol d) Iron
Last Answer : c) Retinol
Description : Which of the following is known as Vitamin B1 ? (1) Retinol (2) Thiamin (3) Riboflavin (4) Ascorbic Acid
Last Answer : Thiamin