Description : The bond in proteins that is not broken under usual conditions of denaturation: (A) Hydrophobic bond (B) Hydrogen bond (C) Disulphide bond (D) Peptide bonds
Last Answer : Answer : D
Description : The bond in proteins that is not hydrolysed under usual conditions of denaturation: (A) Hydrophobic bond (B) Hydrogen bond (C) Disulphide bond (D) Peptide bonds
Last Answer : Answer : C
Description : The disulphide bond is not broken under the usual conditions of (A) Filtration (B) Reduction (C) Oxidation (D) Denaturation
Description : In denaturation of proteins, the bond which is not broken: (A) Disulphide bond (B) Peptide bond (C) Hydrogen bond (D) Ionic bond
Last Answer : Answer : B
Description : Denaturation of proteins involves breakdown of (A) Secondary structure(B) Tertiary structure (C) Quarternary structure(D) All of these
Description : The antigenic antibody functions of proteins by denaturation are frequently (A) Not changed (B) Changed (C) Both (A) and (B) (D) None of these
Description : During denaturation of proteins, all of the following are disrupted except (A) Primary structure (B) Secondary structure (C) Tertiary structure (D) Quaternary structure
Description : Denaturation of proteins results in (A) Disruption of primary structure (B) Breakdown of peptide bonds (C) Destruction of hydrogen bonds (D) Irreversible changes in the molecule
Description : What is meant by denaturation in proteins? -Biology
Last Answer : answer:
Description : Irreversible precipitation of proteins caused by heating is called : (a) Polymerisation (b) Denaturation (c) Electrophoresis (d) Inversion
Last Answer : Denaturation
Description : Thrombolytic therapy has become a useful adjunct in the management of peripheral arterial occlusion. In this setting, direct intraarterial administration rather than intravenous has been advocated ... may be indicated for situations where complete clot evacuation cannot be accomplished surgically
Last Answer : Answer: a, b, e The most popular method for intraarterial thrombolytic therapy for arterial occlusion involves passing a guidewire through the thrombus with arteriographic guidance and ... acute arterial occlusion) or when distal vasculative is occluded and precludes appropriate inflow patency
Description : In case of severe denaturation of protein, there is (A) Reversible denaturation (B) Moderate reversible denaturation (C) Irreversible denaturation (D) None of these
Description : In a protein molecule the disulphide bond is not broken by (A) Reduction (B) Oxidation (C) Denaturation (D) X-ray diffraction
Description : What are the features of denaturation?
Last Answer : Tungstic acid, phosphotungstic acid, trichloro acetic acid, picric acid, sulphosalicylic acid and tannic acid are protein precipitating agents.
Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis
Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically
Description : The following statement(s) is/are true concerning newer detection methods of systemic infection. a. Enzyme-linked immunosorbent assay (ELISA) is a rapid immunologic assay used for ... detected using advanced molecular techniques include cytomegalovirus (CMV) and human immunodeficiency virus (HIV)
Last Answer : Answer: a, b, c, d Although the classic detection of infection based on clinical signs of infection and bacterial culture remain the most common clinical tools, increasing ... including CMV and HIV. Furthermore, preliminary investigations into possible detection of fungal pathogens are underway
Description : Proteins formed when cells are exposed to viral or foreign agents that are capable of activating other components of the immune system are referred to as a) interferons. Interferons are biologic ... series of enzymatic proteins in the serum that, when activated, destroy bacteria and other cells.
Last Answer : a) interferons. Interferons are biologic response modifiers with nonspecific viricidal proteins.
Description : Explain the term Denaturation. -Biology
Description : What is denaturation of enzymes? -Biology
Description : Denaturation of a protein is caused by (a) Heat (b) Acid (c) High salt concentration (d) All of the above
Last Answer : Ans:(d)
Description : Denaturation of a protein is caused by – (1) Heat (2) Acid (3) High salt concentration (4) All of the above
Last Answer : (4) All of the above Explanation: Denaturation of proteins involves the disruption and possible destruction of both the secondary and tertiary structures.
Description : The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents? A. B. C ds DNA 3 5 5 3 ... - extension in the presence of heat stable DNA polymerase (d) A - annealing with two sets of primers
Last Answer : (c) C - extension in the presence of heat stable DNA polymerase
Description : The correct order of steps in Polymerase Chain Reaction (PCR) is (a) extension, denaturation, annealing (b) annealing, extension, denaturation (c) denaturation, extension, annealing (d) denaturation, annealing, extension.
Last Answer : (d) denaturation, annealing, extension.
Description : Which of the following protein structures does “denaturation” destroy? (a) primary and secondary structures (b) secondary and tertiary structures (c) tertiary and quaternary structures (d) secondary, tertiary, and quaternary structures
Last Answer : secondary, tertiary, and quaternary structures
Description : Denaturation refers to the loss of the ______ structure of a ______ molecule. a. primary; carbohydrate b. molecular; fat c. secondary; starch d. tertiary; protein
Last Answer : d. tertiary; protein
Description : The pH scale relates the measure of _______ of a chemical substance. a. ionization b. denaturation c. acidity d. buffering
Last Answer : c. acidity
Description : What is the mode of action of autoclaving “Moist sterilisation”: A. Moist heat sterilization B. Protein denaturation
Last Answer : A. Moist heat sterilization
Description : The correct order of steps in Polymerase Chain Reaction (PCR) is (1) Extension, Denaturation, Annealing (2) Annealing, Extension, Denaturation (3) Denaturation, Extension, Annealing (4) Denaturation, Annealing, Extension
Last Answer : (4) Denaturation, Annealing, Extension
Description : When people say that their Facebook or Myspace "was hacked into"... what is the usual cause that led to the successful hacking?
Last Answer : Usually if it’s hacked, it’s by a friend. Sometimes friends tell each other a bit too much, most of the time friends stop liking each other and this password gets passed on to other people. As far as it getting hacked by a random. Well, I’m not sure.
Description : Hormone receptors that stimulate cAMP production (A) are part of a complex of two proteins that transform the external signal into internal cAMP production (B) are proteins distinct and separate from those ... binding of the hormone (D) are not very specific and bind a number of different hormones
Description : An amino acid not containing the usual— COOH group is (A) Alanine (B) Tryptophan (C) Methionine (D) Taurine
Description : What is the optimum pH of usual enzymes?
Last Answer : Usually enzymes have the optimum pH between 6 and 8.
Description : Histamine (a) May be released from mast cells by a number of therapeutic agents (b) Causes sedation (c) Decreases the force of contraction of ventricular muscle (d) Can cause strong contractions of the gravid human uterus
Last Answer : Ans: D
Description : Agents that often cause vasoconstriction include all of the following except (a) Angiotensin II (b) Methysergide (c) PGF2a (d) Prostacyclin (e) Thromboxane
Description : Substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected are called - (1) Catalysts (2) Hydrocarbons (3) Oxidising agents (4) Substitutes
Last Answer : (1) Catalysts Explanation: Catalysts are substances that cause a reaction to occur or proceed at a different rate without the reaction itself being affected. Eg: hydrogenation of vegetable oils using a nickel catalyst.
Description : Vasoactive drugs which cause the arteries and veins to dilate, thereby shunting much of the intravascular volume to the periphery and causing a reduction in preload and afterload include agents ... Furosemide (Lasix) Furosemide (Lasix) is a loop diuretic that reduces intravascular fluid volume.
Last Answer : a) Sodium nitroprusside (Nipride) Sodium nitroprusside is used in the treatment of cardiogenic shock.
Description : Admixtures which cause early setting and hardening of concrete are called (A) Workability admixtures (B) Accelerators (C) Retarders (D) Air entraining agents
Last Answer : Answer: Option B
Description : if you suspect atrial flutter : Consider digoxin if not already in use because it frequently increases the conduction ratio and decreases the ventricular rate. , Avoid adrenergic and ... to the muscle decrease blood supply to the muscle the heart trying to beat fast ______________________________
Last Answer : decrease O2 supply to the muscle
Description : Bacteriophage (pron: back-teer-e-o-faj) are: a) bacteria b) bacteria precursors c) viruses d) agents which cause the production of bacteria
Last Answer : ANSWER: C -- VIRUSES
Description : Mutations can be caused by (A) Ultraviolet radiation (B) Ionising radiation (C) Alkylating agents (D) All of these
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 : The only known physiological methylating agents in the animal organism are (A) Choline and betaine (B) Choline and δ-adenosyl methionine (C) Betaine and δ-adenyosyl methionine (D) Dimehtyl glycine and betaine
Description : Reduced glutathione functions in R.B.Cs to (A) Produce NADPH (B) Reduce methemoglobin to hemoglobin (C) Produce NADH (D) Reduce oxidizing agents such as H2O2
Last Answer : D
Description : Name some enzymes that are used as therapeutic agents.
Last Answer : Asparaginase for leukemia, streptokinase to dissolve clots, and pepsin for indigestion.
Description : Give some examples of anionic precipitating agents.
Description : Bradykinin and angiotensin II have the following feature common to both: A. They both cause fall in BP B. They both are degraded by Kininase II C. Their precursor proteins are plasma α2 globulins D. They both release aldosterone from adrenal cortex
Last Answer : C. Their precursor proteins are plasma α2 globulins
Description : The distinctive feature of nimesulide is: A. It does not inhibit prostaglandin synthesis B. It does not cause gastric irritation C. It is usually well tolerated by aspirin intolerant asthma patients D. It is not bound to plasma proteins
Last Answer : C. It is usually well tolerated by aspirin intolerant asthma patients
Description : Proteins that cause reactions to proceed more rapidly and lower the energy of activation are called.
Last Answer : ANSWER: ENZYMES
Description : Is it possible to genetically engineer a tapeworm that is beneficial for weight loss, without the usual negative symptoms?
Last Answer : What traits would you engineer for? Just Google “tapeworm diet” and lots of info comes up with delightful details. :-)
Description : Is it usual for people's behavior to get a little bit weird if they spend too much time alone?
Last Answer : I cope better when I have family and friends to talk to. I do enjoy being alone for short periods.