Description : Steroid hormones are synthesised from (A) Cholesterol (B) 7-Dehydrocholesterol (C) Calcitriol (D) 7-Hydroxycholesterol
Last Answer : Answer : A
Description : All mammalian steroid hormones are formed from (A) Purine (B) Pyrimidine (C) Cholesterol (D) Pyrrole
Last Answer : Answer : C
Description : Acetyl CoA formed from pyruvate can be used for the synthesis of all the following except (A) Glucose (B) Fatty acids (C) Cholesterol (D) Steroid hormones
Description : The only correct statement about hormone receptors is (A) Receptors for protein hormones are present in cytosol (B) Receptors for steroid hormones are membrane bound (C) Hormone-receptor binding is irreversible (D) Receptors can undergo down regulation and up regulatoin
Last Answer : Answer : D
Description : Which of the following statements are not incorrect `:-` (i) Liver, the largest gland in our body secretes cholesterol, degrade steroid hormones, vita
Last Answer : Which of the following statements are not incorrect `:-` (i) Liver, the largest gland in our body secretes ... I,ii,iv C. I only D. I,ii,iv
Description : Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of ... protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor
Last Answer : Answer: a, d Although most hormone and other messenger receptors are extracellular, intracellular receptors have been identified. The hormone messengers involved for these receptors are primarily ... DNA-binding domain of the receptor. Activation involves the dissociation of the inhibitor protein
Description : With regard to membrane receptors for hormones: a. they are often glycoproteins b. they are important for hormones made up of steroid c. those for insulin exhibit an intrinsic protein kinase activity d. glucagon uses calcium as a second messenger
Last Answer : they are often glycoproteins
Description : Which statement about hormone types is correct? A) Non-steroid hormones activate an enzyme cascade. B) Steroid hormones regulate the production of a particular protein. C) Non-steroid hormones are ... all have four carbon rings with different side chains. E) All of the choices are correct.
Last Answer : E) All of the choices are correct.
Description : Adrenalin is synthesized from (A) Adenine (B) Adenosine (C) Tyrosine (D) Tryptophan 230 MCQs IN BIOCHEMISTRY
Description : Cholesterol, bile salts, vitamin D and sex hormones are (A) Mucolipids (B) Glycolipids (C) Phospholipids (D) Isoprenoid lipids
Description : The precursor of bile salts, sex hormones and vitamin D is (A) Diosgenin (B) Cholesterol (C) Campesterol (D) Ergosterol
Last Answer : Answer : B
Description : cis-acting elements include (A) Steroid hormones (B) Calcitriol (C) Histones (D) Silencers
Description : A common intermediate in the synthesis of all the steroid hormones is (A) Pregnenolone (B) 17-Hydroxypregnenolone (C) Corticosterone (D) Progesterone
Description : Steroid hormones are synthesised in all of the following except (A) Testes (B) Ovaries (C) Adrenal medulla (D) Adrenal cortex
Description : All the following statements about steroid hormones are true except (A) They are hydrophobic (B) They require carriers to transport them in circulation (C) Their receptors are intracellular (D) They require cyclic AMP as second messenger
Description : The cholesterol molecule is (A) Benzene derivative (B) Quinoline derivative (C) Steroid (D) Straight chain acid
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : C
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 : 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
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 : Enzymes, vitamins and hormones are common in (A) Being proteinaceous (B) Being synthesized in the body of organisms (C) Enhancing oxidative metabolism (D) Regulating metabolism
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.
Description : Vitamin A or retinal is a (A) Steroid (B) Polyisoprenoid compound containing a cyclohexenyl ring (C) Benzoquinone derivative (D) 6-Hydroxychromane
Description : Nicotine present in tobacco is a/an (A) Alkaloid (B) Terpene (C) Steroid (D) Protein
Description : Estrogen and testosterone are steroid hormones, and most likely bind to
Last Answer : Estrogen and testosterone are steroid hormones, and most likely bind to A. Cytoplasmic receptors ... receptors D. G-protein liked membrane receptors
Description : Steroid hormones easily pass through plasma membrane by simple diffusions because by
Last Answer : Steroid hormones easily pass through plasma membrane by simple diffusions because by A. Are lipid- ... through pores D. Contains carbon and hydrogen
Description : Steroid hormones
Last Answer : Steroid hormones A. have only cell surface receptors B. are lipophobic C. act through altering the ... cell D. are produced by only adrenal cortex
Description : Which of the following hormones is a steroid? (1) Estrogen (2) Glucagon (3) Insulin (4) Oxytocin
Last Answer : (1) Estrogen Explanation: Steroid hormone is produced by three endocrine organs. The testes, produces testosterone; the ovaries, produces estrogen; and the adrenal cortex, produces steroid hormones such as cortisol and aldosterone.
Description : Contraceptive pills in the market contain – (1) steroid-hormones (2) inorganic compounds (3) herbicides (4) antibiotics
Last Answer : (1) steroid-hormones Explanation: Contraceptive, pill: Commonly called "the pill," combined oral contraceptives are the most commonly used form of reversible birth control in the United States.
Description : The followings are steroid hormones: a. corticotrophic hormone (ACTH) b. aldosterone c. thyroxine d. growth hormone
Last Answer : aldosterone
Description : Which statement is NOT true about non-steroid (peptide) hormones? A) They are derived from peptides, proteins, polypeptides, and derivatives of amino acids. B) They bind to receptors on the cell surface. ... They create an enzyme cascade effect. E) They enter the cell in order to have an effect.
Last Answer : E) They enter the cell in order to have an effect.
Description : Which statement is NOT true about steroid hormones? A) They include hormones such as estrogen. B) They do not bind to cell surface receptors. C) The hormone-receptor complex can enter the ... complex can bind to chromatin. E) Steroid hormones act faster than non-steroid (peptide) hormones.
Last Answer : E) Steroid hormones act faster than non-steroid (peptide) hormones.
Description : Contraceptive pills in the market contain (1) Inorganic compounds (2) Herbicides (3) Antibiotics (4) Steroid-hormones
Last Answer : Steroid-hormones
Description : A vitamin which can be synthesized by human beings is (A) Thiamin (B) Niacin (C) Folic acid (D) Cyanocobalamin
Description : Vitamin B12 is synthesized by (A) Bacteria only (B) Plants only (C) Animals only (D) Both (A) and (C)
Description : Vitamin synthesized by bacterial in the intestine is (A) A (B) C (C) D (D) K
Description : Triglycerides which are solids or semisolids at room temperature are called __________. (a) oil (b) fat (c) steroid (d) cholesterol
Last Answer : fat
Description : Which of the following statement is correct about membrane cholesterol? (A) The hydroxyl group is located near the centre of the lipid layer (B) Most of the cholesterol is in the form ... forms a rigid, planar Structure (D) The hydrocarbon chain of cholesterol projects into the extracellular fluid
Last Answer : (C) The steroid nucleus form forms a rigid, planar Structure
Description : The first protein synthesized by recombinant DNA technology was (A) Streptokinase (B) Human growth hormone (C) Tissue plasminogen activator (D) Human insulin
Description : In one of the following the quality of the protein synthesized is affected: (A) Diabetes mellitus (B) Gont (C) Multiple myeloma (D) Primaquine sensitivity
Description : Folding of newly synthesized proteins is accelerated by (A) Protein disulphide isomerase (B) Prolyl cis-trans isomerase (C) Chaperonins (D) All of these
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 : The given diagrammatic OH OH HOCH O 2 X representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one ... Component (a) Cholesterol Guanine (b) Amino acid NH2 (c) Nucleotide Adenine (d) Nucleoside Uracil
Last Answer : (d) Nucleoside Uracil
Description : Which is a steroid vitamin?
Last Answer : Vitamin D
Last Answer : (B) Polyisoprenoid compound containing a cyclohexenyl ring
Description : Insulin: a. is secreted as a pro-insulin b. increases protein synthesis c. is required for glucose uptake in all tissues d. is a steroid hormone
Last Answer : is secreted as a pro-insulin
Description : Identify A, B and C in the diagramatic representation of the mechanism of hormone action. B A Response 1 C Physiological Responses Select the correct option from the following. (a) A-Steroid Hormone; B- ... ; C - Second Messenger (d) A-Protein Hormone; B-Cyclic AMP; C-Hormone-receptor Complex
Last Answer : (b) A-Protein Hormone; B-Receptor; C-Cyclic AMP