Description : Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.
Last Answer : (a) help in regulating metabolism
Description : Enzymes are different from catalysts in (A) Being proteinaceous (B) Not used up in reaction (C) Functional at high temperature (D) Having high rate of diffusion
Last Answer : Answer : A
Description : Who suggested that enzymes are proteinaceous? (A) Buchner (B) Kuhne (C) Sumner (D) Pasteur
Last Answer : Answer : C
Description : Non essential amino acids (A) Are not components of tissue proteins (B) May be synthesized in the body from essential amino acids (C) Have no role in the metabolism (D) May be synthesized in the body in diseased states
Last Answer : Answer : B
Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.
Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.
Last Answer : (B) May be synthesized in the body from essential amino acids
Description : Which one of the following statements is fully correct? (A) Hormones are needed in the diet (B) Hormones can be elaborated only by endocrine glands (C) All the hormones enter the ... (D) Hormones are substance synthesized in the body in small quantities and control and regulate metabolic events
Last Answer : Answer : D
Description : If a coenzyme is required in an enzyme reaction, the former usually has the function of (A) Acting as an acceptor for one of the cleavage products of the substrate (B) Enhancing the specificity ... C) Increasing the number of receptor sites of the apo enzyme (D) Activating the substrate ENZYMES 167
Description : Vitamins are (A) Accessory food factors (B) Generally synthesized in the body (C) Produced in endocrine glands (D) Proteins in nature
Description : What are the co-enzymes necessary for oxidative decarboxylation of pyruvate?
Last Answer : Thiamine pyrophosphate, NAD, FAD, Lipoic acid, Co-enzyme A.
Description : One of the enzymes regulating glycolysis is (A) Phosphofructokinase (B) Glyceraldehyde-3-phosphate dehydrogenase (C) Phosphotriose isomerase (D) Phosphohexose isomerase
Description : The major role of minor elements inside living organisms is to act as (a) co-factors of enzymes (b) building blocks of important amino acids (c) constituent of hormones (d) binder of cell structure.
Last Answer : (a) co-factors of enzymes
Description : Steroid hormones are synthesized from (A) Adenine (B) Protein (C) Vitamin (D) Cholesterol
Description : Which of the following hormones are synthesized as prehormones (A) Vasopressin and oxytocin (B) Growth hormone and insulin (C) Insulin and parathyroid hormone (D) Insulin and Glucagon
Description : Thyroid hormones are synthesized by the iodination of the amino acid: (A) Glycine (B) Phenylalanine (C) Alanine (D) Tyrosine
Description : Catecholamine hormones are synthesized in the (A) Chromaffin cells of adrenal medulla (B) Zona glomerulosa of adrenal cortex (C) Zona fasciculate of adrenal cortex (D) Zona reticularis of adrenal cortex
Description : Which of the following statement(s) is/are true concerning metabolic derangements in sepsis and the systemic inflammatory response syndrome which may follow progressive shock? a. Alterations in glucose ... The serum aromatic amino acids fall rapidly as they are actively used in oxidative metabolism
Last Answer : Answer: b, c A broad spectrum of metabolic abnormalities become apparent in sepsis and the systemic inflammatory response syndrome following shock. Disruption of the normal cycles of carbohydrate, ... acetyl coenzyme A. This results in reduced serum level of leucine, isoleucine and valine
Description : Bactericidal action of aminoglycoside antibiotics is due to: A. Inhibition of bacterial protein synthesis B. Alteration of bacterial cell membrane permeability C. Damage to bacterial cell wall D. Inhibition of bacterial oxidative metabolism
Last Answer : B. Alteration of bacterial cell membrane permeability
Description : Regulating hormones from hypothalamus reach adenohypophysis through
Last Answer : Regulating hormones from hypothalamus reach adenohypophysis through A. Neuron B. Neuroendocrine cells C. Portal blood vessel D. Diffusion
Description : The following are true about calcium regulating hormones: a. calcitonin increases the plasma calcium concentration b. vitamin D is produced in the skin c. vitamin D is metabolized to its active form in the liver and kidney. d. vitamin D increases calcium absorption from the gut
Last Answer : vitamin D increases calcium absorption from the gut
Description : Phytohormones are (a) chemical regulating flowering (b) chemical regulating secondary growth (c) hormones regulating growth from seed to adulthood (d) regulators synthesised by plants and influencing physiological processes.
Last Answer : (d) regulators synthesised by plants and influencing physiological processes.
Description : Which of the following vitamins is synthesized in the body by intestinal bacteria----? A. Vitamins B1 B. Vitamins B12 C. Vitamins E D. Vitamins K (Answer)
Last Answer : D. Vitamins K (Answer)
Description : Which of the following hormones is not involved in carbohydrate metabolism? (A) ACTH (B) Glucagon (C) Vasopressin (D) Growth hormone
Description : Hormones act only on specific organs or tissues. These are called (A) Active sites (B) Reaction centre (C) Target organ/Tissue(D) Physiological site HORMONE METABOLISM 231
Description : The second messenger for many hormones is (A) ATP (B) cyclic AMP (C) cGMP (D) UTP HORMONE METABOLISM 227
Description : Secretion of MSH is regulated by (A) Feedback mechanism (B) Melatonin (C) Hypothalamic hormones (D) ACTH HORMONE METABOLISM 217
Description : Which of the following hormones is not involved in carbohydrate metabolism? (A) Cortisol (B) ACTH (C) Glucogen (D) Vasopressin
Last Answer : D
Description : Which of these statements is incorrect? (a) Enzymes of TCA cycle are present in mitochondrial matrix. (b) Glycolysis occurs in cytosol. (c) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Last Answer : (d) Oxidative phosphorylation takes place in outer mitochondrial membrane
Description : Lysosome contains (a) oxidative enzymes (b) hydrolytic enzymes (c) reductive enzymes (d) anabolic enzymes
Last Answer : (b) hydrolytic enzymes
Description : Which of these statements is incorrect ? (1) Enzymes of TCA cycle are present in mitochondrial matrix. (2) Glycolysis occurs in cytosol. (3) Glycolysis operates as long as it is supplied ... that can pick up hydrogen atoms. (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Last Answer : (4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Description : Digestive enzymes are (a) oxidative (b) Hydrolytic (c) Synthetic (d) None of these
Last Answer : (b) Hydrolytic
Description : Hormones (A) Act as coenzyme (B) Act as enzyme (C) Influence synthesis of enzymes (D) Belong to B-complex group
Description : Proteinous substances which catalyze biochemical reactions are known as (A) Activators (B) Catalysts (C) Enzymes (D) Hormones
Description : Antioxidants help a person maintain good health because they (a) prevent the vitamins deficiency. (b) prevent excessive oxidation of glucose and other carbohydrates. (c) neutralise the free radicals ... metabolism. (d) activate certain genes in the body cells which help delay the ageing process.
Last Answer : Ans:(c)
Description : The end product of amino acid nitrogen metabolism in uricotelic organisms (reptiles and birds) is (A) Bilirubin (B) Urea (C) Uric acid (D) Biliverdin
Description : In human and other ureotelic organisms, the end product of amino acid nitrogen metabolism: (A) Bile acids (B) Ketone bodies (C) Urea (D) Barium sulphate
Description : Dehydration in human body is caused due to the loss of: (1) vitamins (2) salts (3) hormones (4) water
Last Answer : (4) water Explanation: Dehydration is the condition where there is acute shortage of water in our body. This occurs when the amount of water leaving our body is greater than the ... three types of dehydration: hypotonic or hyponatremic (primarily a loss of electrolytes, sodium in particular).
Description : Dehydration in human body is caused due to the loss of : (1) vitamins (2) salts (3) hormones (4) water
Last Answer : water
Description : Which one of the following vitamins can be synthesized by bacteria inside the gut? (a) D (b) K (c) B1 (d) C
Last Answer : (c) B1
Description : One of the first enzymes synthesized by many bacteriophage is __________ , an RNA dependent RNA polymerase A.RNA transcriptase B.RNA polymerase C.RNA ligase D.RNA replicase
Last Answer : D.RNA replicase
Description : Restriction endonucleases (A) Cut RNA chains at specific locations (B) Excise introns from hnRNA (C) Remove Okazaki fragments (D) Act as defensive enzymes to protect the host bacterial DNA from DNA of foreign organisms
Description : Which of the following statements is true? (A) Enzymes have names ending ase (B) Enzymes are highly specific in their action (C) Enzymes are living organisms (D) Enzymes get activated on heating
Description : An antibiotic is - (1) achemical synthesized by a human cell against a microorganism (2) a chemical synthesised by amicro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.
Last Answer : (2) a chemical synthesised by amicro-organism against another microorganisms Explanation: An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is often used ... by a microorganism that is antagonistic to the growth of other microorganisms in high dilution.
Description : An antibiotic is (1) a chemical synthesized by a human cell against a microorganism (2) a chemical synthesised by a micro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.
Last Answer : a chemical synthesised by a micro-organism against another micro-organisms
Description : Which one of the following hormones is not involved in sugar metabolism ?
Last Answer : Which one of the following hormones is not involved in sugar metabolism ? A. Glucagon B. Cortisone C. Aldosterone D. Insulin
Description : Hormones involved in carbohydrate metabolism are
Last Answer : Hormones involved in carbohydrate metabolism are A. Insulin, glucagon, epinephrine, and parathormone ... , glucagon, nor-epinephrine, and melatonin
Description : Which one of the following hormones is not involved in sugar metabolism? (a) Insulin (b) Glucagon (c) Cortisone (d) Aldosterone
Last Answer : (d) Aldosterone
Description : What is the cascade of events that follows a stress or trauma to produce adrenal reaction? A) hypothalamus (ACTH-releasing hormone)-anterior pituitary (ACTH)-adrenal cortex mineralocorticoids and ... ) E) adrenal cortex (hormones)-hypothalamus (ACTH-releasing hormone)-anterior pituitary (ACTH)
Last Answer : A) hypothalamus (ACTH-releasing hormone)-anterior pituitary (ACTH)-adrenal cortex mineralocorticoids and glucocorticoids (regulate metabolism and sugar level)
Description : An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenacne of cell shape is called
Last Answer : An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in ... B. Plasmalemma C. Cytoskeleton D. Thylakoid