Description : The role of transfer RNS (IRNA) is to (a) Transfer mRNA from the nucleus to the cytoplasm (b) Carry amino acids from the cytoplasm to the nucleus (c) Carry the newly synthesised protein to its site of function in the cell (d) Transport amino acids to ribosomes
Last Answer : Ans:(d)
Description : mRNA is synthesised on DNA template in which direction? (a) 5′ → 3′ (b) 3′ → 5′ (c) Both (a) and (b) (d) Any
Last Answer : a) 5′ → 3′
Last Answer : (a) 5′ → 3′
Description : A mRNA of eukaryotes can code for (A) Only one polypeptide (B) Two polypeptides (C) Three polypeptides (D) Five polypeptides
Last Answer : Answer : A
Description : A polycistronic mRNA can be seen in (A) Prokaryotes (B) Eukaryotes (C) Mitochondria (D) All of these
Description : Which sequence in case of eukaryotes is important for MRNA tailing? (a) GAGAGA (b) GAATTC(c) UACGAC (d) UACUAAC
Last Answer : (d) UACUAAC
Description : RNA transcription is more complex in eukaryotes because it is first made as a primary RNA transcript that contains intron and exon sequences. What kind of modification must occur to produce a mature mRNA?
Last Answer : RNA splicing. Introns must be removed and exons are spliced together to form a mature RNA transcript.
Description : The role of molecular chaperones is to A-facilitate binding of ribosomes to mRNA B-degrade newly synthesized polypeptides that contain inaccurate sequences C-.facilitate binding of RNA polymerase to DNA D-aid a newly synthesized polypeptide in folding to its proper shape
Last Answer : -aid a newly synthesized polypeptide in folding to its proper shape
Last Answer : aid a newly synthesized polypeptide in folding to its proper shape
Description : Which vitamin is synthesised in the body by intestinal bacteria? -Do You Know?
Last Answer : answer:
Description : Prothrombin , albumin and fibrinogen are synthesised by
Last Answer : Prothrombin , albumin and fibrinogen are synthesised by A. Pancreas B. Bone marrow C. Spleen D. Liver
Description : During chemical evolution, key biological compounds were synthesised
Last Answer : During chemical evolution, key biological compounds were synthesised A. in the atomosphere B. along the ocean ... . in the ocean D. none of the above
Description : Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:-
Last Answer : Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:- A. B. C. D.
Description : How many ATP are directly synthesised in glycolysis from one glucose.
Last Answer : How many ATP are directly synthesised in glycolysis from one glucose.
Description : In which stage of the cell cycle are histone proteins synthesised in a eukaryotic cells ?
Last Answer : In which stage of the cell cycle are histone proteins synthesised in a eukaryotic cells ? A. ... )` -stage of prophase D. During entire prophase
Description : r-RNA is synthesised in
Last Answer : r-RNA is synthesised in A. Nucleus B. Glogi body C. Cytoplasm D. Nucleoplasm
Description : Which one of the following hormones thought synthesised elsewhere, is stored and released by the master gland ?
Last Answer : Which one of the following hormones thought synthesised elsewhere, is stored and released by ... hormone C. Luteinizing hormone D. Prolactin
Description : Pyrosulphuric acid may be synthesised by dissolving `SO_(3)` in
Last Answer : Pyrosulphuric acid may be synthesised by dissolving `SO_(3)` in A. `H_(2)O` B. `H_(2)SO_(3)` C. `H_(2)SO_(4)` D. `H_(2)S_(2)O_(8)`
Description : Androgens are synthesised in (A) Leydig cells in testes (B) Sertoli cells in testes (C) Seminiferous tubules (D) Prostate gland
Description : All the following statements about transcortin are true except (A) It is synthesised in liver (B) It transports glucocorticoids (C) It transports aldosterone (D) It transports progesterone
Last Answer : Answer : C
Description : Steroid hormones are synthesised from (A) Cholesterol (B) 7-Dehydrocholesterol (C) Calcitriol (D) 7-Hydroxycholesterol
Description : Steroid hormones are synthesised in all of the following except (A) Testes (B) Ovaries (C) Adrenal medulla (D) Adrenal cortex
Description : Epinephrine is synthesised in (A) Chromaffin cells of adrenal medulla (B) Sympathetic ganglia (C) Brain (D) All of these
Last Answer : Answer : D
Description : Dopamine is synthesised from (A) Dihydroxyphenylalanine (B) Epinephrine (C) Norepinephrine (D) Metanephrine
Description : Parathyroid hormone (PTH) is synthesised in (A) Chief cells of parathyroid glands (B) Oxyphil cells of parathyroid glands (C) Para follicular cells of thyroid glands (D) Follicular cells of thyroid gland
Description : All the following statements about proopiomelanocortin are true except (A) It is made up of 285 amino acids (B) It is synthesised in pars intermedia and anterior lobe of pituitary gland ... ) It is the precursor of corticotropin like intermediate lobe peptide and endorphins 218 MCQs IN BIOCHEMISTRY
Description : A hormone synthesised in the hypothalamus is (A) Melatonin (B) Melanocyte stimulating hormone (C) Vasopressin (D) Prolactin
Description : Melatonin is synthesised from (A) Phenylalanine (B) Tyrosine (C) Tryptophan (D) None of these
Description : Melatonin is synthesised in (A) Hypothalamus (B) Posterior pituitary gland (C) Pineal gland (D) Melanocytes
Description : All the following statements about ceruloplasmin are correct except (A) It is a copper-containing protein (B) It possesses oxidase activity (C) It is synthesised in intestinal mucosa (D) Its plasma level is decreased inWilson’s disease
Description : Niacin can be synthesised in human beings from (A) Histidine (B) Phenylalanine (C) Tyrosine (D) Tryptophan
Description : Prothrombin is synthesised in (A) Erythrocytes (B) Reticulo-endothelial cells (C) Liver (D) Kidneys
Description : All of the following statements about Tangier disease are true except (A) It is a disorder of HDL metabolism (B) Its inheritance is autosomal recessive (C) Apoproteins A-I and A-II are not synthesised (D) Plasma HDL is increased
Description : All the following statements about carnitine are true except (A) It can be synthesised in the human body (B) It can be synthesized from methionine and lysine (C) It is required for transport of short chain fatty acids into mitochondria (D) Its deficiency can occur due to haemodialysis
Description : In I-cell disease, lysosomal enzymes (A) Are not synthesised (B) Are inactive (C) Lack signal sequence (D) Cannot reach lysosomes
Last Answer : Answer : B
Description : Serotonin is synthesised from (A) Serine (B) Phenylalanine (C) Tyrosine (D) Tryptophan
Description : Histamine is synthesised in (A) Brain (B) Mast cells (C) Basophils (D) All of these
Description : Calcitonin is synthesised in (A) Parathyroid glands (B) Thyroid gland (C) Pars intermedia of pituitary (D) Adrenal cortex
Description : Apolipoprotein B-100 is synthesised in (A) Adipose tissue (B) Liver (C) Intestine (D) Liver and intestine
Description : Which ONE of the following is true concerning Antidiuretic hormone(ADH)? 1) Carbamazepine potentiates it's release 2) Ethanol potentiates it's release 3) It circulates in the blood bound to neurohypophysin 4) It is a cyclic octapeptide 5) It is synthesised in the posterior pituitary
Last Answer : Answers-1 ADH is a nonapeptide manufactured in the paraventricular and supra-optic nuclei of the hypothalamus and released from the posterior pituitary. It acts on the collecting ducts improving ... agents such as thiazides and SSRIs may potentiate its release. Ethanol usually inhibits release.
Description : What happens during seed germination? (a) Heat is liberated (b) Starch is synthesised (c) Fat is synthesised (d) Light is absorbed
Last Answer : Ans:(a)
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 : What is an antibiotic? (1) A chemical compound produced by a living organism that inhibits the growth of other organisms (2) Acompound synthesised by a living organism that inhibits the ... compound inhibiting the growth of other organisms (4) Asynthetic compound inhibiting the growth of bacteria
Last Answer : (4) Asynthetic compound inhibiting the growth of bacteria Explanation: Antibiotics, also known as antimicrobial drugs, are drugs that fight infections caused by bacteria. Alexander Fleming discovered the ... (not produced by microorganisms) that can also kill or inhibit the growth of microbes.
Description : How prostaglandins are synthesised?
Last Answer : The arachidonic acid is released by the action of phospholipase A2 on phospholipids prostaglandin synthesis is catalysed by prostaglandin H synthase (PGHS). It contains two separate enzyme activities, cyclo-oxygenase and peroxidase.
Description : How N-acetyl neuraminic acid (sialic acid) is synthesised?
Last Answer : N-acetyl mannosamine-6-phosphate + phospho enol pyruvate.
Description : Where is insulin synthesised?
Last Answer : Beta cells of langerhans of pancreas.
Description : Which amino acid is synthesised after it gets in- corporated into the protein?
Last Answer : Hydroxyproline
Description : Which of the following statements is not correct? (a) In man insulin is synthesised as a proinsulin. (b) The proinsulin has an extra peptide called C-peptide. (c) The functional insulin has A and B chains linked together by hydrogen bonds. (d) Genetically engineered insulin is produced in E.Coli.
Last Answer : (c) The functional insulin has A and B chains linked together by hydrogen bonds.
Description : Drug called ‘Heroin’ is synthesised by (a) nitration of morphine (b) methylation of morphine (c) acetylation of morphine (d) glycosylation of morphine.
Last Answer : (c) acetylation of morphine