Description : In Ames’ assay, addition of a carcinogen to the culture medium allows S. typhimurium to grow (A) In the presence of histidine (B) In the presence of arginine (C) In the absence of histidine (D) In the absence of arginine
Last Answer : Answer : C
Description : Ames assay is a rapid method for detection of (A) Oncoviruses (B) Retroviuses (C) Chemical carcinogens (D) Typhoid
Description : Deficiency of vitamin B12 can be diagonised by (A) Carr-Price reaction (B) Ames assay (C) Watson-Schwartz test (D) Schilling test
Last Answer : Answer : D
Description : The Ames test is an effective procedure for a. Identifying disease-causing bacterial species. b. Detecting potential human carcinogens. c. Determining if DNA replication has occurred. d. Detecting antibiotic resistance.
Last Answer : b. Detecting potential human carcinogens.
Description : The Ames test is used to a. Identify Potential Human Carcinogens. b. Discover Auxotrophic Mutants. c. Find Pathogenic Bacterial Species. d. Identify Antibiotic Resistant Mutants.
Last Answer : a. Identify Potential Human Carcinogens.
Last Answer : (D) Schilling test
Description : Cystinuria results from inability to (A) Metabolise cysteine (B) Convert cystine into cysteine (C) Incorporate cysteine into proteins (D) Reabsorb cystine in renal tubules
Description : Buffering action of haemoglobin is mainly due to its (A) Glutamine residues (B) Arginine residues (C) Histidine residues (D) Lysine residues
Description : During its life cycle fasciola heptica (Liver fluke) Infects its intermadiate host and primary host at the following larval stages respectively
Last Answer : During its life cycle fasciola heptica (Liver fluke) Infects its intermadiate host and primary host ... an cercaria D. Miracidium and metacercaria .
Description : Which one of the following stages in the life history of liver fluke infects the sheep ?
Last Answer : Which one of the following stages in the life history of liver fluke infects the sheep ? A. Miracidium B. Redia C. Cercaria D. Metacercaria
Description : During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively (a) redia and miracidium (b) cercaria and redia (c) metacercaria and cercaria (d) miracidium and metacercaria
Last Answer : (d) miracidium and metacercaria.
Description : Ehrlichiosis is transmitted by _____ and infects _____. a. Lice; Red Blood Cells b. Ticks; Leukocytes c. Fleas; Skin Cells d. Ticks; Liver Cells
Last Answer : b. Ticks; Leukocytes
Description : Amplification of dihydrofolate reductase gene in a cancer cell makes the cell (A) Susceptible to folic acid deficiency (B) Less malignant (C) Resistant to amethopterin therapy (D) Responsive to amethopterin therapy
Description : Organelles can be separated from cell homogenate through (a) chromatography (b) X-rays diffraction (c) differential centrifugation (d) auto-radiography
Last Answer : (c) differential centrifugation
Description : Various oncogens may encode all of the following except: (A) Carcinogens (B) Growth factors (C) Receptors for growth factors (D) Signal transducers for growth factors
Last Answer : Answer : A
Description : Which one of the following is not a part of Koch s postulates? a. The microorganism must be isolated from a dead animal and pure cultured b. The microorganism and disease can be identified from ... a healthy susceptible animal. d. The same microorganism must be present in every case of the disease.
Last Answer : d. The same microorganism must be present in every case of the disease.
Description : Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (1) They do not need to reproduce. (2) They are somatic cells. (3) They do not metabolise. (4) All their internal ... Only (1) (b) (1), (3) and (4) (c) (2) and (3) (d) Only (4)
Last Answer : (d) Only (4)
Description : Bacterial cells susceptible to penicillium can be protected from destruction if the medium in which they are exposed is of A- high osmotic pressure B- low osmotic pressure C- moderate osmotic pressure D- high surface tension
Last Answer : high osmotic pressure
Description : Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these
Description : Is it your left or right part of your body that is more susceptible to cancer?
Last Answer : It’s ridiculous. Most organs we have both on the right and left. The exception is our liver and pancreas are on the right, and cancer found in those organs typically is a death sentence, unless you are extremely luck and have it diagnosed early and it’s operable.
Description : Stuart's transport medium is used for transport of specimen containing A- Neisseria gonorrhoeae B- Salmonella C- Vibrio cholera D- Shigella
Last Answer : Neisseria gonorrhoeae
Description : What carries carcinogens into the lungs?
Last Answer : What is the answer ?
Description : What is the advantage of radio-immuno assay?
Last Answer : Very small quantities of substances could be accurately measured.
Description : The is used to determine an antibiotic‘s minimal inhibitory concentration (NEC). a. Ames test b. tube dilution method c. agar disk diffusion method d. Kirby-Bauer test
Last Answer : b. tube dilution method
Description : Which one of the following organs converts glycogen into glucose and purifies the blood? (1) Liver (2) Kidney (3) Lungs (4) Spleen
Last Answer : (1) Liver Explanation: Liver produces bile which is stored in the gall bladder. Liver is the largest gland in the body.
Last Answer : Liver
Description : Children's TV Dinners and Carcinogens?
Last Answer : I don't think they are. They have to be made cheaply so the packaging doesn't cost so much. Ever try to heat one up a second time. It becomes soft. To me that says its melting. So you figure some ... cabinets. Best to put it on a plate and then heat it in the microwave. Best to be safe than sorry.
Description : Do plastic retainers leach carcinogens?
Last Answer : nahhh, you’re good!
Description : What are carcinogens? -Biology
Last Answer : answer:
Description : They're practically everything
Last Answer : I believe and am glad that this matter is being handled more and more strictly. Of course, it is often said that these substances are present in very small quantities, and that we would have to eat a lot of food that contains such substances in order to have trouble, but even then.
Description : Histidine is converted into histamine by (A) Carboxylation (B) Decarboxylation (C) Methylation (D) Hydroxylation
Last Answer : Answer : B
Description : Women become susceptible to osteoporosis after menopause due to decreased (A) Secretion of Parathormone (B) Conversion of vitamin D into calcitriol (C) Secretion of estrogen (D) Secretion of progesterone
Description : What ordinarily infects plant by injecting some of its genetic material into a cell and using the cell to create its food?
Description : In human beings molybdenum is mainly absorbed from (A) Liver (B) Kidney (C) Intestine (D) Pancreas
Description : The biosynthesis of urea occurs mainly in the liver: (A) Cytosol (B) Mitochondria (C) Microsomes (D) Nuclei
Description : Esterification of cholesterol occurs mainly in (A) Adipose tissue (B) Liver (C) Muscles (D) Kidneys
Description : α-Oxidation of fatty acids occurs mainly in (A) Liver (B) Brain (C) Muscles (D) Adipose tissue
Description : Glycerol released from adipose tissue by hydrolysis of triglycerides is mainly (A) Taken up by liver (B) Taken up by extrahepatic tissues (C) Reutilised in adipose tissue (D) Excreted from the body FATS AND FATTY ACID METABOLISM 85
Description : Lipid stores are mainly present in (A) Liver (B) Brain (C) Muscles (D) Adipose tissue
Description : Urea biosynthesis occurs mainly in the liver involving the number of amino acids: (A) 3 (B) 4 (C) 5 (D) 6
Description : The biosynthesis of Urea occurs mainly in the Liver: (A) Cytosol (B) Microsomes (C) Nucleus (D) Mitochondria
Description : Ammonia is transported from muscles to liver mainly in the form of (A) Free ammonia (B) Glutamine (C) Asparagine (C) Alanine
Description : Highly porous refractory bricks are (A) Less susceptible to chemical attack by molten fluxes and gases etc (B) Very strong (C) Having very high thermal conductivity (D) None of these
Last Answer : (D) None of these
Description : Identify the false statement (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels (B) Pitting corrosion is usually very localised (C) Hydrogen embrittlement is facilitated by tensile stress (D) Stress corrosion cracking is facilitated by tensile stress
Last Answer : (A) Martensitic steels are less susceptible to pitting corrosion than austenitic steels
Description : The following are true about blood coagulation: a. heparin inhibits blood coagulation through its interference with vitamin K metabolism in the liver b. addition of vitamin K to freshly drawn ... delays clotting c. thrombin converts fibrinogen to fibrin d. platelets are essential for blood clot
Last Answer : thrombin converts fibrinogen to fibrin
Description : A specific fructokinase present in liver has a very high affinity for its substrate because (A) Km for fructose is very high (B) Km for fructose is very low (C) Activity is affected by fasting (D) Activity is affected by insulin
Description : N-Formiminoglutamate is a metabolite of (A) Glutamate (B) Histidine (C) Tryptophan (D) Methionine
Description : Zinc finger motif is formed in some proteins by binding of zinc to (A) Two cysteine residues (B) Two histidine residues (C) Two arginine residues (D) Two cysteine and two histidine residues or two pairs of two cysteine residues each
Description : Which of the following amino acids produce a vasoconstrictor on decarboxylation? (A) Histidine (B) Tyrosine (C) Threonine (D) Arginine
Description : Histamine is formed from histidine by the enzyme histidine decarboxylase in the presence of (A) NAD (B) FMN (C) HS-CoA (D) B6-PO4