A substance that stimulates the production of antibodies when introduced into a living organism is known as— (1) carcinogen (2) androgen (3) antigen (4) oestrogen

A substance that stimulates the production of antibodies when introduced into a living organism is known as— (1) carcinogen (2) androgen (3) antigen (4) oestrogen
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(3) antigen Explanation: Antigens are the substance that when introduced into the body stimulates the production of an antibody. Antigens include toxins, bacteria, foreign blood cells, and the cells of transplanted organs. Antigens can also react with formed antibodies. Antigen-antibody reactions serve as host defenses against microorganisms and other foreign bodies, or are used in laboratory tests for detecting the presence of either antigen or antibody. The antigen city of a protein is determined by its sequence of amino acids as well as by its conformation.
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What do we call a substance, usually a protein, which when introduced into the body stimulates the formation of antibodies?

Description : What do we call a substance, usually a protein, which when introduced into the body stimulates the formation of antibodies?

Last Answer : ANSWER: ANTIGEN

Select the option which correctly matches the endocrine gland with its hormone and its function. Endocrine Hormone Function gland (a) Placenta Estrogen Initiates secretion of the milk (b) Corpus Estrogen Essential for luteum maintenance of endometrium (c) Leydig’s Androgen Initiates the cells production of sperms (d) Ovary FSH Stimulates follicular development and the secretion of estrogens

Description : Select the option which correctly matches the endocrine gland with its hormone and its function. Endocrine Hormone Function gland (a) Placenta Estrogen Initiates secretion of the milk (b) Corpus ... of sperms (d) Ovary FSH Stimulates follicular development and the secretion of estrogens

Last Answer : (c) Leydig’s Androgen Initiates the cells production of sperms

Identify the wrong statement with reference to immunity. (a) When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”. (b) When ready-made antibodies are directly given, it is called “Passive immunity”(c) Active immunity is quick and gives full response. (d) Fetus receives some antibodies from mother, it is an example for passive immunity.

Description : Identify the wrong statement with reference to immunity. (a) When exposed to antigen (living or dead) antibodies are produced in the host's body. It is called Active immunity . (b) When ... full response. (d) Fetus receives some antibodies from mother, it is an example for passive immunity

Last Answer : c) Active immunity is quick and gives full response.

What is the substance that stimulates the production of red blood cells? Which is the organ that secretes it? Under what conditions does this secretion increase?

Description : What is the substance that stimulates the production of red blood cells? Which is the organ that secretes it? Under what conditions does this secretion increase?

Last Answer : The substance that stimulates the production of red blood cells by the bone marrow is erythropoietin. Erythropoietin is a hormone secreted by the kidneys. Its secretion is increased when there is deficient ... (as it occurs in high altitudes) or by internal diseases, as in pulmonary diseases.

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Description : Which of the following statement(s) is/are true concerning the antibody response to an invading antigen? a. All antibodies are composed of one type of heavy and one type of light protein chain b. ... stimulus d. Immunoglobulins A, D, and E play an active role in the circulating humoral response

Last Answer : Answer: a Humoral defenses consist of antibody (immunoglobulin; Ig) and complement. All Ig classes (IgM, IgG, IgA, IgE, IgD) and IgG subclasses are composed of one type (M, G, A, E, D ... exist in smaller amounts in the circulation and do not appear to play a major role as host defense components

A person with 'AB' blood group is sometimes called a universal recipient because of the – (1) lack of antigen in his blood (2) lack of antibodies in his blood (3) lack of both antigens and antibodies in his blood (4) presence of antibodies in his blood

Description : A person with 'AB' blood group is sometimes called a universal recipient because of the – (1) lack of antigen in his blood (2) lack of antibodies in his blood (3) lack of both antigens and antibodies in his blood (4) presence of antibodies in his blood

Last Answer : (2) lack of antibodies in his blood

The following are true about the ABO and rhesus (Rh) system: a. a person of group O is a universal donor b. a person who is group AB has anti-A and anti-B antibodies c. the presence of the D antigen means that the subject is Rh positive d. rhesus antibodies occur naturally

Description : The following are true about the ABO and rhesus (Rh) system: a. a person of group O is a universal donor b. a person who is group AB has anti-A and anti-B antibodies c. the presence of the D antigen means that the subject is Rh positive d. rhesus antibodies occur naturally

Last Answer : the presence of the D antigen means that the subject is Rh positiv

What is correct for blood group O? (a) No antigens but both a and b antibodies are present. (b) A antigen and b antibody present. (c) Antigen and antibody both absent. (d) A and B antigens and a, b antibodies present.

Description : What is correct for blood group O? (a) No antigens but both a and b antibodies are present. (b) A antigen and b antibody present. (c) Antigen and antibody both absent. (d) A and B antigens and a, b antibodies present.

Last Answer : (a) No antigens but both a and b antibodies are present.

Person with blood group AB is considered as universal recipient because he has (a) both A and B antigens on RBC but no antibodies in the plasma (b) both A and B antibodies in the plasma (c) no antigen on RBC and no antibody in the plasma (d) both A and B antigens in the plasma but no antibodies.

Description : Person with blood group AB is considered as universal recipient because he has (a) both A and B antigens on RBC but no antibodies in the plasma (b) both A and B antibodies in the plasma (c) no antigen on RBC and no antibody in the plasma (d) both A and B antigens in the plasma but no antibodies.

Last Answer : (a) both A and B antigens on RBC but no antibodies in the plasma

A hybridoma cell a. Secretes monoclonal antibodies. b. Presents antigens on its surface. c. Secretes polyclonal antibodies. d. Is an antigen-presenting cell

Description : A hybridoma cell a. Secretes monoclonal antibodies. b. Presents antigens on its surface. c. Secretes polyclonal antibodies. d. Is an antigen-presenting cell

Last Answer : d. Is an antigen-presenting cell

_____ cells have antibodies on their surface that perform receptor functions by binding to antigen (epitope).a. T b. B c. NK d. A-C are correct

Description : _____ cells have antibodies on their surface that perform receptor functions by binding to antigen (epitope). a. T b. B c. NK d. A-C are correct

Last Answer : b. B

Acquired immunity usually involves protein receptors on B and T cells that recognize discrete regions of the antigen called _____. a. haptens b. epitopes c. antibodies d. protein receptors

Description : Acquired immunity usually involves protein receptors on B and T cells that recognize discrete regions of the antigen called _____. a. haptens b. epitopes c. antibodies d. protein receptors

Last Answer : b. epitopes

In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

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Last Answer : B.Antigens and antibodies are in optimal proportion

In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Description : In which of the following case a large lattice is formed? A.Antibody is in excess B.Antigens and antibodies are in optimal proportion C.Antigen is in excess D.None of these

Last Answer : B.Antigens and antibodies are in optimal proportion

Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy and light chains B- By the combination of different heavy and light chains that form the antigen binding siteC- Antibody proteins can physically change their shape to bind different epitopes D- Both (a) and (b)

Description : Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? A- By rearrangements of the DNA encoding the variable regions of the heavy ... proteins can physically change their shape to bind different epitopes D- Both (a) and (b)

Last Answer : Both (a) and (b)

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Last Answer : c) IgE mediated 

Which of the following hormones is primarily responsible for stimulating the production of progesterone? a) Luteinizing hormone Luteinizing hormone is released by the pituitary gland. b) Follicle-stimulating hormone Follicle-stimulating hormone is responsible for stimulating the ovaries to secrete estrogen. c) Estrogen Estrogens are responsible for developing and maintaining the female reproductive tract. d) Androgen Androgens, secreted in small amounts by the ovaries, are involved in early development of the follicle and also affect the female libido.

Description : Which of the following hormones is primarily responsible for stimulating the production of progesterone? a) Luteinizing hormone Luteinizing hormone is released by the pituitary gland. b) Follicle-stimulating ... , are involved in early development of the follicle and also affect the female libido.

Last Answer : a) Luteinizing hormone Luteinizing hormone is released by the pituitary gland.

Name a component of gasoline that has been classified by the U.S. EPA as a "known human carcinogen".

Description : Name a component of gasoline that has been classified by the U.S. EPA as a "known human carcinogen". 

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The U.S. EPA recently concluded that environmental tobacco smoke should be considered (quote) w) "a possible human teratogen" x) "a priority air pollutant" y) "a known human carcinogen" z) "a possible human carcinogen"

Description : The U.S. EPA recently concluded that environmental tobacco smoke should be considered (quote) w) "a possible human teratogen" x) "a priority air pollutant" y) "a known human carcinogen" z) "a possible human carcinogen" 

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Assertion : Artificially acquired passive immunity results when antibodies or lymphocytes produced outside the host are introduced into a host. Reason

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A substance produced by a living organism and capable of anti￾microbial activity is called a/an (A) Antibiotic (B) Antiseptic (C) Disinfectant (D) None of these

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The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the mouth pH and it has an important role of having IgA antibodies (also present in tears, colostrum, mother’s milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Description : The saliva pH is approximately 6.8. It is thus a slightly acid pH. Saliva lubricates the food bolus and initiates the enzymatic extracellular digestion of food. It also works as a buffer for the ... 's milk and in the mucosae of the intestine and airways) that protect the organism against pathogens.

Last Answer : What is the salivary digestive enzyme? Which type of food does it digest and into which smaller molecules does it transform the food?

_____ is the natural ability of an organism to have an inbuilt mechanism to resist and destroy the infection. a) antibiotic b)immunity c)antibodies d)none

Description : _____ is the natural ability of an organism to have an inbuilt mechanism to resist and destroy the infection. a) antibiotic b)immunity c)antibodies d)none

Last Answer : b)immunity

Conversion of a procarcinogen into a carcinogen often requires (A) Proteolysis (B) Microsomal hydroxylation (C) Exposure to ultraviolet radiation (D) Exposure to X-rays

Description : Conversion of a procarcinogen into a carcinogen often requires (A) Proteolysis (B) Microsomal hydroxylation (C) Exposure to ultraviolet radiation (D) Exposure to X-rays

Last Answer : Answer : B

Which one controls the secretion of oestrogen

Description : Which one controls the secretion of oestrogen

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Which of the following hormone is called emergency hormone? (1) Insulin (2) Adrenaline (3) Oestrogen (4) Oxytocin

Description : Which of the following hormone is called emergency hormone? (1) Insulin (2) Adrenaline (3) Oestrogen (4) Oxytocin

Last Answer : (2) Adrenaline Explanation: In this situation, the adrenal medulla secretes extra adrenaline and noradrenaline into the bloodstream. The hormones have important effects on the body.

Which of the following hormones is released in excess quantity during excitement’? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Description : Which of the following hormones is released in excess quantity during excitement’? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Last Answer : (3) Adrenaline Explanation: Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress ... largely refers to this hormone as epinephrine, although the two terms may be used interchangeably.

Which of the following hormone is released in excess quantity during excitement? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Description : Which of the following hormone is released in excess quantity during excitement? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Last Answer : (3) Adrenaline Explanation: Adrenaline is a hormone produced by the adrenal glands during high stress or exciting situations. This powerful hormone is part of the human body's acute stress response system, ... , all of which work to increase blood flow to the muscles and oxygen to the lungs.

What are Endocrine Glands? Name any two. From which part of the body are the following secreted: a) Insulin b) Thyroxin c) Adrenaline d) Oestrogen e) Testosterone f) Cortisol

Description : What are Endocrine Glands? Name any two. From which part of the body are the following secreted: a) Insulin b) Thyroxin c) Adrenaline d) Oestrogen e) Testosterone f) Cortisol

Last Answer : These are those glands which pour their secretions directly into the blood stream . Their secretions are called as Hormones which are the chemical substances produced by the cells of one part and transported ... and many other functions of body and mind. E.g. Pituitary Gland, Thyroid Gland etc.

56 years old woman has come to you with the complaints of hot flushes irritability, joint pains with lack of sleep. Most appropriate treatment would be: a) Hysterectomy. b) Vitamins. c) Combined oestrogen, progesterone preparations. d) Phytooestrogens. e) Selective estrogen receptor modulators (SERMS).

Description : 56 years old woman has come to you with the complaints of hot flushes irritability, joint pains with lack of sleep. Most appropriate treatment would be: a) Hysterectomy. b) ... Combined oestrogen, progesterone preparations. d) Phytooestrogens. e) Selective estrogen receptor modulators (SERMS).

Last Answer : c) Combined oestrogen, progesterone preparations.

Which of the following hormones is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Description : Which of the following hormones is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Last Answer : Adrenaline

Which of the following hormone is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Description : Which of the following hormone is released in excess quantity during excitement ? (1) Cortisone (2) Serotonin (3) Adrenaline (4) Oestrogen

Last Answer : Oestrogen

Growth substance that stimulates nodule formation in leguminous plants is

Description : Growth substance that stimulates nodule formation in leguminous plants is

Last Answer : Growth substance that stimulates nodule formation in leguminous plants is  A. NAA B. IAA C. IBA D. ABA

Antigen is a substance which

Description : Antigen is a substance which

Last Answer : Antigen is a substance which A. lowers body temperature B. destroys harmful bacteria C. triggers the immune system D. is used as an antidote to poison

Which of the following statements regarding TNFa are true? a. TNFa has a marked procoagulant effect b. Passive immunization of patients with neutralizing antibodies to TNFa improves survival from multi-organ system failure c. TNFa upregulates E-selectin expression d. The most potent known stimulus for TNFa production and release is IL-1

Description : Which of the following statements regarding TNFa are true? a. TNFa has a marked procoagulant effect b. Passive immunization of patients with neutralizing antibodies to TNFa improves survival from multi-organ ... expression d. The most potent known stimulus for TNFa production and release is IL-1

Last Answer : Answer: a, c TNFa has a marked procoagulant effect on endothelial cells, precipitating intravascular thrombosis. TNFa causes endothelial cells to release procoagulant activity (tissue factor), ... to produce TNFa, however the most potent stimulus for TNFa production and release is endotoxin

Is a carcinogen a mutagen? -Biology

Description : Is a carcinogen a mutagen? -Biology

Last Answer : answer:

Is a carcinogen a mutagen? -Biology

Description : Is a carcinogen a mutagen? -Biology

Last Answer : answer:

Difference between mutagen and carcinogen -Biology

Description : Difference between mutagen and carcinogen -Biology

Last Answer : answer:

Difference between mutagen and carcinogen -Biology

Description : Difference between mutagen and carcinogen -Biology

Last Answer : answer:

What makes carcinogen so dangerous?

Description : What makes carcinogen so dangerous?

Last Answer : they cause cancer

What makes carcinogen so dangerous?

Description : What makes carcinogen so dangerous?

Last Answer : they cause cancer

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

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

Which of the following is NOT a carcinogen? a. Genetic factors b. UV light c. Certain chemicals d. X rays

Description : Which of the following is NOT a carcinogen? a. Genetic factors b. UV light c. Certain chemicals d. X rays

Last Answer : a. Genetic factors

What is the function of androgen hormone ?

Description : What is the function of androgen hormone ?

Last Answer : Androgens or androgenic hormones are all natural steroid hormones that work to bind male androgen receptors in vertebrates . It works in the formation of male genitalia and secondary physical features ... addition to natural causes, there is also the use of androgen hormones in medical science.

Androgen insensitivity syndrome?

Description : Androgen insensitivity syndrome?

Last Answer : DefinitionAndrogen insensitivity syndrome (AIS) is when a person who is genetically male (has one X and one Y chromosome) is resistant to male hormones called androgens. As a result, the person has some or ... male body parts. The child born appears to be a girl. The complete form of the syndrome o

An androgen which is more powerful than testosterone is (A) Androstenedione (B) Dihydrotestosterone (C) Androsterone (D) Epiandrosterone

Description : An androgen which is more powerful than testosterone is (A) Androstenedione (B) Dihydrotestosterone (C) Androsterone (D) Epiandrosterone

Last Answer : Answer : B

Cortisol is a (A) Glucocorticoid (B) Mineralocorticoid (C) Androgen (D) Estrogen

Description : Cortisol is a (A) Glucocorticoid (B) Mineralocorticoid (C) Androgen (D) Estrogen

Last Answer : Answer : B

The hormone measured in urine to test pregnancy is (A) Anterior pituitary luteinizing hormone (B) Androgen (C) Progesterone (D) Choroinic gonadotropin

Description : The hormone measured in urine to test pregnancy is (A) Anterior pituitary luteinizing hormone (B) Androgen (C) Progesterone (D) Choroinic gonadotropin

Last Answer : Answer : D

3-β-Hydroxysteroid dehydrogenase and ∆5,4 isomerase catalyse the conversion of the weak androgen DHEA to (A) Androstenedione (B) Testosterone (C) Progesterone (D) Estrone

Description : 3-β-Hydroxysteroid dehydrogenase and ∆5,4 isomerase catalyse the conversion of the weak androgen DHEA to (A) Androstenedione (B) Testosterone (C) Progesterone (D) Estrone

Last Answer : Answer : A

The following androgen does not produce cholestatic jaundice as an adverse effect: A. Testosterone propionate B. Methyl testosterone C. Fluoxymesterone D. Stanozolo

Description : The following androgen does not produce cholestatic jaundice as an adverse effect: A. Testosterone propionate B. Methyl testosterone C. Fluoxymesterone D. Stanozolo

Last Answer : A. Testosterone propionate