Active Immunity

Q.

What is cell mediated immunity?

Q.

Rh –ve person donated blood to Rh +ve person for the second time. Then, ?

1. Rh –ve person will die.

2. Rh +ve person will die.

3. Rh +ve blood starts reacting to Rh –ve blood.

4. Nothing happens to Rh +ve person.

Q. When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body. This type of immunity is called

Q. Mention one application for each of the following:
(a) Passive immunization
(b) Antihistamine
(c) Colostrum
(d) Cytokinin-barrier [2]

Q. (a) It is generally observed that the children who had suffered from chicken-pox in their childhood may not contract the same disease in their adulthood. Explain giving reasons the basis of such an immunity in an individual. Name this kind of immunity.

(b) What are interferons? Mention their role. [3]

Q.

What are some properties of monoclonal antibodies?

Q. Fill in the Blanks
Ability of an organism to resist disease is called a _____.

Q. What is immunization?

Q. Development of active immunity is related to

1. Helper T-cells
2. Suppressor cells
3. Memory cells
4. NK cells

Q.

Active immunity is elicited by exposure to
i. Toxoids
ii. Subclinical infection
iii. Antitoxins
iv. Immunoglobulins
v. Antigen exposure

1. ii, v
2. ii, iv, v
3. i, ii, v
4. ii, iii, v

Q.

Active immunity is built due to the presence of

1. Memory cells

2. Killer Cells

3. Plasma Cells

4. None of the above

Q. Developing vaccines for AIDS is very difficult. Give reasons.​

Q.

Given below are some statements (a-c) each with one or two blanks. Select the option which correctly fills up the blanks in the given statements.

(a) Plague is caused by __(i)___ a deadly bacterium.

(b) Filariasis is characterized by swelling of the ___(i)____ and of other parts of the body. The disease, therefore, is commonly called ____(ii)____, due to its resemblance to the leg of an elephant.

(c) ___(i)___ is the resistance to infection that an individual possesses by virtue of his/her genetic and constitutional makeup.

1. (b) -(i) Neck, (ii) Goitre (c) -(i) Autoimmunity

2. (a)-(i) Bordetella pertussis (c) (i) Passive Immunity

3. (a)-(i) Yersinia pestis, (c) (i) Innate immunity

4. (b)-(i) Leg, (ii) Elephantiasis (c) (i) Acquired Immunity

Q.

DPT stands for

1. Diphtheria, Polio, and Tetanus

2. Diphtheria, Pertussis, and Tetanus

3. Dysentery, Polio, and Typhoid

4. Diphtheria, Polio, and Typhoid

Q. What are monoclonal antibodies? Mention its use.

Q. Distinguish between the following:, (a) cell-mediated immunity and humoral immunity, (b) active and passive immunization

Q. How many classes of immunoglobulin are present in humans?

1. 3
2. 4
3. 5
4. 6

Q. Match the components of body defence with their corresponding descriptions.

1. External antibodies
2. Internal antibodies
3. Surface barriers
4. Phagocytosis

Q. What is the role of complement system in the body's defence?

1. It interferes with viral replication
2. It is involved with antibody production
3. It aids antigen presentation
4. It cause pathogen lysis

Q. Artificial active immunity can be acquired from

1. Serious illness
2. Vaccinatiion
3. Repeated exposure to the some microbes
4. Treatment with pencillin

Q. Antibodies produced by a group of identical B-cells against a single epitope of an antigen is called

1. Polyclonal antibodies
2. Monoclonal antibodies
3. Antihapten antibodies
4. Somaclonal antibodies

Q. An example of gene therapy is

1. production of injectable hepatitis B vaccine
2. production of vaccines in food crops like potatoes which can be eaten
3. introduction of gene for adenosine deaminase in persons suffering from Severe Combined Immuno Deficiency (SCID)
4. production of test tube babies by artificial insemination and implantation of fertilised eggs

Q. Active immunity differs from passive immunity in

1. Used for treatment of acute infection
2. Immune response -short lived and less effective
3. Used for prophylaxis to increases body resistance
4. No immunological memory

Q. Which of these statements is not true about IgM?

1. the first antibody to be produced by neonates
2. the first antibody produced in primary and secondary immune response
3. trimeric in nature having 6 antigen binding sites
4. present in blood because it cannot diffuse into tissues because of its higher molecular weight

Q. Differentiate immunogen from antigen. Explain the natural and potential antigens.

Q. When you are exposed to a bacterial glycoprotein, your body elicits:

1. Active immune response
2. Passive immune response
3. Autoimmune response
4. No response

Q. Name the branch of biology that deals with - Study of causes of immunity (resistance to or defense against diseases).

Q. The most important antigens are

1. Nucleotides
2. Steroids
3. Triglycerides
4. Proteins

Q.

Active immunity is generated by

1. Exposure to a live pathogen

2. Exposure to a dead pathogen

3. By transfer of antibodies from a healthy person

4. Both A and C

Q. Monoclonal antibodies and polyclonal antibodies are produced by ________________.

1. T-memory cells
2. NK-cells
3. Plasma cells of B-lymphocytes
4. Memory cells of B-lymphocytes