Which is not a major defense mechanism in the stomach? A.Proteolytic enzymes B.Low pHC.Dense normal flora D.All of these

Which is not a major defense mechanism in the stomach?
A.Proteolytic enzymes
B.Low pH
C.Dense normal flora
D.All of these
by

1 Answer

Answer :

C.Dense normal flora
by

Related questions

Why do protease-supplying cells of the stomach and of the pancreas make only precursors of the active proteolytic enzymes?

Description : Why do protease-supplying cells of the stomach and of the pancreas make only precursors of the active proteolytic enzymes?

Last Answer : The stomach and the pancreas make zymogens of the proteases pepsin, chymotrypsin and trypsin and these zymogens are released into the gastric or duodenal lumen for activation. This happens to ... production of zymogens is a protective strategy against the natural effects of the proteolytic enzymes.

What is common among amylase, rennin and trypsin? (a) These are produced in stomach. (b) These act at a pH lower than 7. (c) These all are proteins. (d) These all are proteolytic enzymes.

Description : What is common among amylase, rennin and trypsin? (a) These are produced in stomach. (b) These act at a pH lower than 7. (c) These all are proteins. (d) These all are proteolytic enzymes.

Last Answer : (c) These all are proteins.

The digestability of certain denatured proteins by proteolytic enzymes (A) Decreases (B) Increases (C) Normal (D) None of these

Description : The digestability of certain denatured proteins by proteolytic enzymes (A) Decreases (B) Increases (C) Normal (D) None of these

Last Answer : Answer : A

Group I C. botulinum strains generally includes in A.all types of strains (proteolytic)A, B and F B.all types of strains (non-proteolytic) E and F C.all types of strains (proteolytic)C, D and F D.none of the above

Description : Group I C. botulinum strains generally includes in A.all types of strains (proteolytic)A, B and F B.all types of strains (non-proteolytic) E and F C.all types of strains (proteolytic)C, D and F D.none of the above

Last Answer : A.all types of strains (proteolytic)A,

Some proteolytic enzymes are

Description : Some proteolytic enzymes are

Last Answer : Some proteolytic enzymes are A. Trypsin, Erepsin, Pepsin B. Amylase, Lipase, Zymase C. Ampylopsin, Steapsin, Ptyalin D. Urease, Dehydrogenase, Zymase

Isoenzymes can be characterized by (A) Proteins lacking enzymatic activity that are necessary for the activation of enzymes (B) Proteolytic enzymes activated by hydrolysis (C) Enzymes with identical primary structure (D) Similar enzymes that catalyse different reaction

Description : Isoenzymes can be characterized by (A) Proteins lacking enzymatic activity that are necessary for the activation of enzymes (B) Proteolytic enzymes activated by hydrolysis (C) Enzymes with identical primary structure (D) Similar enzymes that catalyse different reaction

Last Answer : Answer : B

Suppuration is mainly the result of the combined action of four factors; which of the following is not one of these factors?CHECK A. Necrosis B. Presence of lymphocytes C. Collection of neutrophils D. Accumulation of tissue fluid E. Autolysis by proteolytic enzymes

Description : Suppuration is mainly the result of the combined action of four factors; which of the following is not one of these factors?CHECK A. Necrosis B. Presence of lymphocytes C. Collection of neutrophils D. Accumulation of tissue fluid E. Autolysis by proteolytic enzymes

Last Answer : B. Presence of lymphocytes

Some proteolytic enzymes are (C.P.M.T. 77) (a) Trypsin, peptidase, pepsin (b) Amylopsin, steapsin, ptyalin (c) Amylase, lipase, zymase (d) Urease, zymase, dehydrogenase

Description : Some proteolytic enzymes are (C.P.M.T. 77) (a) Trypsin, peptidase, pepsin (b) Amylopsin, steapsin, ptyalin (c) Amylase, lipase, zymase (d) Urease, zymase, dehydrogenase

Last Answer : (a) Trypsin, peptidase, pepsin

What is common among amylase, rennin and trypsin (a) All are protein (b) These are all proteolytic enzyme (c) These are produced in stomach (d) These act at a pH lower than 7

Description : What is common among amylase, rennin and trypsin (a) All are protein (b) These are all proteolytic enzyme (c) These are produced in stomach (d) These act at a pH lower than 7

Last Answer : (a) All are protein

The bacteria which is predominant flora of the human gut is A- Escherichia coli B- Clostridium perfringens C- Bacteroides D- Actinomyces

Description : The bacteria which is predominant flora of the human gut is A- Escherichia coli B- Clostridium perfringens C- Bacteroides D- Actinomyces

Last Answer : Clostridium perfringens

Answer: b Metabolic response to injury results in increased energy expenditure. If energy intake is less than expenditure, oxidation of body fat stores and erosion of lean body mass will occur with resultant loss of weight. When weight loss exceeds 10–15% of body weight, the complications of malnutrition interact with disease processes, with increased morbidity and mortality rates. The goal of nutritional support is maintenance of body cell mass and limitation of weight loss to less than 10% preinjury. The major impact of nutritional support in the trauma patient is to aid host defense. Under-nutrition may compromise the available host defense mechanism and may thus increase the likelihood of invasive sepsis, multiple organ system failure, and death. Resuscitation, oxygenation and arrest

Description : Answer: b Metabolic response to injury results in increased energy expenditure. If energy intake is less than expenditure, oxidation of body fat stores and erosion of lean body mass will occur ... requirements, caloric requirements should be distributed at a ratio of 70% as glucose and 30% as fat

Last Answer : Which of the following statement(s) is/are true concerning body fuel reserves? a. The largest fuel reserve in the body is skeletal muscle b. Fat provides about 9 calories/gram c. Free glucose and glycogen stores are a trivial fuel reserve d. Body protein is a valuable storage form of energy

The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following statement(s) is/are true concerning complement activation? a. The alternate (properdin) pathway of complement activation can occur directly through contact with fungal or bacterial cell wall compounds b. Complement component fragments may serve to decrease vascular permeability c. Excessive complement activation can produce deleterious effects d. Fragments of certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism

Description : The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following ... certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism

Last Answer : Answer: a, c, d Complement activation can occur through either classic or alternate (properdin) pathways, both of which eventuate in deposition of terminal complement pathway components on the ... and release of lysosomal enzymes that can directly damage certain target tissues, such as the lung

By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- Interfere with normal nucleic acid synthesisInterfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic C- membrane as well as the function of several membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Description : By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- ... membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Last Answer : all of these

Verrryy long scenario of old age pt with DM, HTN, hx of multiple cardiac attack, CVA, came for routine check up in PHC, u found bilateral opacification in both lenses, with decreasing of visual acuity, u will: Refer to lazer therapist refer to cataract surgeon refer to ophthalmologist follow up 60-patient on glaucoma medication for weeks came with SOB, cough the cause a- timolol b- betoxolol c- pilocarpin

Description : Verrryy long scenario of old age pt with DM, HTN, hx of multiple cardiac attack, CVA, came for routine check up in PHC, u found bilateral opacification in both lenses, with decreasing of visual ... glaucoma medication for weeks came with SOB, cough the cause a- timolol b- betoxolol c- pilocarpin

Last Answer : a- timolol

The first line of host defense is the barrier presented to the external environment. Which of the following statement(s) is/are true concerning host barriers? a. Sebaceous glands secrete chemical compounds that maintain a relatively high pH, providing effective bacterial stasis b. Within the respiratory tract, ciliary function serves to extrude microorganisms trapped within the mucus secretion layer c. The low pH within the stomach markedly decreases bacterial content of the upper gastrointestinal tract d. Gut peristalsis serves to prevent microbial adherence and invasion

Description : The first line of host defense is the barrier presented to the external environment. Which of the following statement(s) is/are true concerning host barriers? a. Sebaceous glands secrete ... of the upper gastrointestinal tract d. Gut peristalsis serves to prevent microbial adherence and invasion

Last Answer : Answer: b, c, d The skin, mucus membranes, and epithelial layers of various organs of the body constitute effective physical barriers against microbial invasion. In certain portions of the ... very low pH within the stomach and gut peristalsis both serve to prevent microbial adherence and invasion

Following are the defenses of the colon except A- sIgA B- fast flow rate C- dense resident microbiota D- mucus

Description : Following are the defenses of the colon except A- sIgA B- fast flow rate C- dense resident microbiota D- mucus

Last Answer : fast flow rate

In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at A- 60 to -78°C B- 20 to -30°C C- 30 to -48°C D- 48 to -58°C

Description : In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at A- 60 to -78°C B- 20 to -30°C C- 30 to -48°C D- 48 to -58°C

Last Answer : - 60 to -78°C

: _____ is an exaggerated or inappropriate immune defense that is causing the problems in an affected individual. a. Hypersensitivity b. Autoimmune disease c. AIDS d. HIV

Description : : _____ is an exaggerated or inappropriate immune defense that is causing the problems in an affected individual. a. Hypersensitivity b. Autoimmune disease c. AIDS d. HIV

Last Answer : a. Hypersensitivity

Which of the following is a cellular barrier in the innate defense system? a. macrophages b. Erythrocytes c. B-cellsd. T-cells

Description : Which of the following is a cellular barrier in the innate defense system? a. macrophages b. Erythrocytes c. B-cells d. T-cells

Last Answer : a. macrophages

Which of the following are antimicrobial defense mechanisms in the urethra? a. size and length of the urethra b. shedding of cells in the mucosal lining and bacteria with urinationc. normally basic urine d. A-C are correct

Description : Which of the following are antimicrobial defense mechanisms in the urethra? a. size and length of the urethra b. shedding of cells in the mucosal lining and bacteria with urination c. normally basic urine d. A-C are correct

Last Answer : b. shedding of cells in the mucosal lining and bacteria with urination

Compared to older tetracyclines, doxycycline produces a lower incidence of superinfection diarrhoea because (a) It is completely absorbed in the small intestines so that drug concentration in the colonic contents is low (b) It is inactivated by the gut microflora (c) It is not active against the microbes of the normal gut flora (d) It is a potent tetracycline and inhibits the superinfection causing microbes as well

Description : Compared to older tetracyclines, doxycycline produces a lower incidence of superinfection diarrhoea because (a) It is completely absorbed in the small intestines so that drug concentration in the colonic ... (d) It is a potent tetracycline and inhibits the superinfection causing microbes as well

Last Answer : Ans: A

Compared to older tetracyclines, doxycycline produces a lower incidence of superinfection diarrhoea because: A. It is completely absorbed in the small intestines so that drug concentration in the colonic contents is low B. It is inactivated by the gut microflora C. It is not active against the microbes of the normal gut flora D. It is a potent tetracycline and inhibits

Description : Compared to older tetracyclines, doxycycline produces a lower incidence of superinfection diarrhoea because: A. It is completely absorbed in the small intestines so that drug concentration in the colonic contents ... the microbes of the normal gut flora D. It is a potent tetracycline and inhibits

Last Answer : A. It is completely absorbed in the small intestines so that drug concentration in the colonic contents is low

stress can cause the body to tense up as a defense mechanism. Which body system would this affect?

Description : stress can cause the body to tense up as a defense mechanism. Which body system would this affect?

Last Answer : musculoskeltal

Restriction endonucleases (a) are present in mammalian cells for degradation of DNA when the cell dies (b) are used in genetic engineering for ligating two DNA molecules (c) are used for in vitro DNA synthesis (d) are synthesized by bacteria as part of their defense mechanism.

Description : Restriction endonucleases (a) are present in mammalian cells for degradation of DNA when the cell dies (b) are used in genetic engineering for ligating two DNA molecules (c) are used for in vitro DNA synthesis (d) are synthesized by bacteria as part of their defense mechanism.

Last Answer : (d) are synthesized by bacteria as part of their defense mechanism.

The phosphorylation of an antibiotic is an example of which mechanism of resistance? a. Target modificationb. Reduced permeability c. Antibiotic inactivation d. Altered metabolic pathway

Description : The phosphorylation of an antibiotic is an example of which mechanism of resistance? a. Target modification b. Reduced permeability c. Antibiotic inactivation d. Altered metabolic pathway

Last Answer : c. Antibiotic inactivation

Which of the foLlowing is NOT a transmission mechanism for hepatitis B? a. Sexual contact b. Non-sterile body piercing equipment c. Fecal-oral route d. Blood-contaminated needles

Description : Which of the foLlowing is NOT a transmission mechanism for hepatitis B? a. Sexual contact b. Non-sterile body piercing equipment c. Fecal-oral route d. Blood-contaminated needles

Last Answer : c. Fecal-oral route

In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway

Description : In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway

Last Answer : C.substrate level phosphorylation

Induction of tolerance mechanism(s) is/are A- Suppression B- clonal deletion C- .clonal anergy D- all of these

Description : Induction of tolerance mechanism(s) is/are A- Suppression B- clonal deletion C- .clonal anergy D- all of these

Last Answer : all of these

In making ****, in the process of ____ barley grains are steeped in water while naturally occurring enzymes digest the starch to simpler carbohydrates. a. steeping b. mashing c. maltng d. worting

Description : In making beer, in the process of ____ barley grains are steeped in water while naturally occurring enzymes digest the starch to simpler carbohydrates. a. steeping b. mashing c. maltng d. worting

Last Answer : c. maltng

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

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

Viropexis takes place in the phagocytic vacuoles and is due to the action of Enzymes A- DNA gyrase B- lysosomal protease C- lysosomal lipaseD- all of these

Description : Viropexis takes place in the phagocytic vacuoles and is due to the action of Enzymes A- DNA gyrase B- lysosomal protease C- lysosomal lipase D- all of these

Last Answer : lysosomal protease

Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactionsD- none of these

Description : Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactions D- none of these

Last Answer : have different structural forms but identical catalytic properties

Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Description : Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Last Answer : structures in DNA caused by inverted repeats

In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by A- conjugal transfer by a self-transmissible plasmid B- generalized phage transduction C- natural transformation D- none of the above

Description : In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by A- conjugal transfer by a self-transmissible plasmid B- generalized phage transduction C- natural transformation D- none of the above

Last Answer : natural transformation

n lysogeny, A- a bacteriophage transfers bacterial DNA B- bacteria take up double stranded DNA from the environment C- DNA-degrading enzymes in the extracellular medium would stop the process D- a bacteriophage genome is integrated into the bacterial genome

Description : n lysogeny, A- a bacteriophage transfers bacterial DNA B- bacteria take up double stranded DNA from the environment C- DNA-degrading enzymes in the extracellular medium would stop the process D- a bacteriophage genome is integrated into the bacterial genome

Last Answer : a bacteriophage genome is integrated into the bacterial genome

Enzymes can A- not pass through semipermeable membrane B- pass through semipermeable membrane C- dissolve semipermeable membrane D- none of these

Description : Enzymes can A- not pass through semipermeable membrane B- pass through semipermeable membrane C- dissolve semipermeable membrane D- none of these

Last Answer : not pass through semipermeable membrane

Organic molecules that increase the rate of metabolic reactions with themselveschangingareknown as A- coenzymes B- enzymes C- substrates D- .reactants

Description : Organic molecules that increase the rate of metabolic reactions with themselveschangingareknown as A- coenzymes B- enzymes C- substrates D- .reactants

Last Answer : enzymes

Enzymes are A- organic compounds produced by living organism B- .inorganic compounds C- organic as well as inorganic compounds D- all of these

Description : Enzymes are A- organic compounds produced by living organism B- .inorganic compounds C- organic as well as inorganic compounds D- all of these

Last Answer : organic compounds produced by living organism

Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactions D- none of these

Description : Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactions D- none of these

Last Answer : have different structural forms but identical catalytic properties

Intracellular enzymes A-synthesize cellular material only B- .synthesize cellular material and perform catabolic reaction C- synthesize cellular material and perform anabolic reaction D- only provide energy to the cell

Description : Intracellular enzymes A-synthesize cellular material only B- .synthesize cellular material and perform catabolic reaction C- synthesize cellular material and perform anabolic reaction D- only provide energy to the cell

Last Answer : .synthesize cellular material and perform catabolic reaction

Allosteric enzymes are A- larger than simple enzyme B- smaller than simple enzyme C- larger and more complex than simple enzyme D- .smaller than simple enzyme but not complex

Description : Allosteric enzymes are A- larger than simple enzyme B- smaller than simple enzyme C- larger and more complex than simple enzyme D- .smaller than simple enzyme but not complex

Last Answer : larger and more complex than simple enzyme

Enzymes combine with a ___________at the___________ site to lower the activation energy. a. Substrate; Active b. Product; Noncompetitive c. Product; Active d. Coenzyme; Active

Description : Enzymes combine with a ___________at the___________ site to lower the activation energy. a. Substrate; Active b. Product; Noncompetitive c. Product; Active d. Coenzyme; Active

Last Answer : a. Substrate; Active

Enzymes are a. Inorganic compounds. b. Destroyed in a reaction. b. Proteins. a. Vitamins.

Description : Enzymes are a. Inorganic compounds. b. Destroyed in a reaction. b. Proteins. a. Vitamins.

Last Answer : c

In the 18th century Carl Linnaeus started classifying organisms based a. Similarities in form b. DNA c. RNA d. Enzymes

Description : In the 18th century Carl Linnaeus started classifying organisms based a. Similarities in form b. DNA c. RNA d. Enzymes

Last Answer : a. Similarities in form

Bacterial cells in biofilms can communicate with each other through a. osmosis b. quorum sensing c. diffusion d. enzymes

Description : Bacterial cells in biofilms can communicate with each other through a. osmosis b. quorum sensing c. diffusion d. enzymes

Last Answer : b. quorum sensing

What is needed in order for reactions to occur at body temperatures? a. buffers b. acids c. bases d. enzymes

Description : What is needed in order for reactions to occur at body temperatures? a. buffers b. acids c. bases d. enzymes

Last Answer : d. enzymes

Proteins are chains of _____ that sometimes function as _____. a. monosaccharaides; energy compounds b. lipids; structural materials c. amino acids; enzymes d. disaccharides; enzymes

Description : Proteins are chains of _____ that sometimes function as _____. a. monosaccharaides; energy compounds b. lipids; structural materials c. amino acids; enzymes d. disaccharides; enzymes

Last Answer : c. amino acids; enzymes

Retroviruses are so-named because their reverse transcriptase _____. a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA. b. reverses the normal multiplication of cells from a low rate to a high rate. c. reverses the ability of viruses to associate with cells. d. reverses the action of drugs on viruses and allows them to continue multiplying in living cells.

Description : Retroviruses are so-named because their reverse transcriptase _____. a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA. b. reverses the normal ... the action of drugs on viruses and allows them to continue multiplying in living cells.

Last Answer : a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA.

The stomach is a chemical barrier to infection because the stomach a. Contains bile. b. Harbors helicobacterpylori, a member of the host microbiota. c. Possesses defensive cells. d. Has an acid ph.

Description : The stomach is a chemical barrier to infection because the stomach a. Contains bile. b. Harbors helicobacterpylori, a member of the host microbiota. c. Possesses defensive cells. d. Has an acid ph.

Last Answer : d. Has an acid ph.

It has been discovered that Helicobacter pylori is the cause of ______. a. Acute Gastritis b. Gastric Ulcers c. Stomach Cancer d. A-C Are Correct

Description : It has been discovered that Helicobacter pylori is the cause of ______. a. Acute Gastritis b. Gastric Ulcers c. Stomach Cancer d. A-C Are Correct

Last Answer : d. A-C Are Correct