Viral Diseases

Q. The drugs used to quickly reduce the symptoms of allergy are

1. anti-histamine and adrenaline
2. histamine and thyroxine
3. adrenaline and α-interferon
4. all of these

Q. The DNA extraction process follows a number of steps to obtain pure DNA free from other contaminants or macromolecules.
The image below depicts which step of DNA extraction?

1. Precipitation and spooling
2. Enzymatic treatment
3. Addition of chilled ethanol
4. Cell lysis

Q. Human liver fluke has two intermediate hosts in its life cycle which are __A__ and __B__.

1. A - snail, B - fish
2. A - snail, B - human beings
3. A - fish, B - human beings
4. A - mosquito, B - housefly

Q. Prions are infectious agents associated with mad cow disease. These agents are:

1. Proteins
2. Lipids
3. DNA
4. RNA

Q. Which of following is a pair of viral diseases?

1. Ringworm, AIDS
2. Thymus, tuberculosis
3. Common cold, AIDS
4. Dysentery, common cold

Q. A viral disease which spreads by bite of a mosquito is:

1. Filariasis
2. Malaria
3. Diphtheria
4. Dengue

Q. Assertion : Primary lymphoid organs are the places where immature lymphocytes differentiate into antigen-sensitive lymphocytes.
Reason : Primary lymphoid organs provide micro-environment for the development and maturation of lymphocytes.

1. Both assertion and reason are true and reason is the correct explanation of the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but the reason is false
4. Both the assertion and reason are false

Q. Which of the following is a secondary lymphoid organ that is also considered as vestigial organ in human beings?

1. Thymus
2. Tonsils
3. Appendix
4. Spleen

Q. Hematopoiesis and maturation of lymphocytes occurs in ___________.

1. primary lymphoid organs
2. secondary lymphoid organs
3. tertiary lymphoid tissues
4. lymph nodes

Q. Bt toxins exist as inactive protoxins in bacteria but when an insect ingest the inactive toxin it becomes active toxin in the presence of :

1. Alkaline pH of insect mid gut
2. Acidic pH of insect mid gut
3. Bacterial enzyme
4. Specific protein

Q. Which of the following disease cannot be treated by antibiotics?

1. Hansen’s disease
2. Pertussis
3. Diphtheria
   
4. Mumps

Q. Pneumococcus experiment done by Frederick Griffith proves that

1. DNA is the genetic material
2. bacteria undergo binary fission
3. bacteria do not reproduce sexually
4. RNA often controls the production of DNA and proteins

Q. Which of the following is a viral disease of poultry birds?

1. Anthrax
2. Ranikhet
3. None of these
4. Coccidiosis

Q. Which one of the following statements is incorrect with respect to bird flu?

1. Bird flu is also known as avian influenza
2. It is caused by H5N1 virus
3. It is a non-communicable disease
4. It can be transmitted to human beings

Q.

Which of the following is responsible for “bird flu”?

1. H5 N1

2. Haemophilus influenza

3. HIV

4. Rhino virus

Q. Primary lymphoid organs serve as the site for

1. formation of lymphocytes only
2. formation and maturation of lymphocytes
3. proliferation of lymphocytes
4. formation of lymph

Q. Which of the following is an infectious agent that causes the mad cow disease?

1. Viroids
2. Bacteriophage
3. Virus
4. Prions

Q. Primary lymphoid organs : Immature lymphocytes differentiates into antigen sensitive lymphocyte :: Secondary Lymphoid organs : _____________________________.

1. Tissue fluid movement
2. Site for interaction of lymphocytes with antigen
3. Interaction of RBCs and WBCs
4. Maturity of B lymphocytes only

Q. A viral disease which spreads by bite of a mosquito is:

1. Filariasis
2. Malaria
3. Dengue
4. Diphtheria

Q.

Explain the use of microorganisms in medicine.

Q. Diphtheria is caused by

1. nematodes
2. bacteria
3. virus
4. fungi

Q. Match the diseases with the respective organs affected
$\begin{array}{cc}\text{Diseases}& \text{Organs affected}\\ \text{A. Plague}& \text{i. Throat}\\ \text{B. Diphtheria}& \text{ii. Lungs}\\ \text{C. Typhoid}& \text{iii. Lymphatic system}\\ \text{D. Tuberculosis}& \text{iv. Small and Large intestine}\end{array}$

1. A →iii; B → iv; C→ i; D → ii
2. A →i; B → iii; C→ iv; D → ii
3. A →ii; B → i; C→ iv; D → iii
   
4. A →iii; B → i; C→ iv; D → ii

Q. Read the following assertion and reason statements and choose the correct option.

Assertion: Peyer’s patches of small intestine are considered secondary lymphoid organs.

Reason: The M cells of Peyer’s patches trap the antigens and allow the antibodies to bind to these to induce immunogenic response.

1. Both assertion and reason are correct and the reason correctly explains the assertion statement
2. Both assertion and reason are correct but the reason does not correctly explain the assertion statement
3. Only the assertion is correct
4. Both assertion and reason are incorrect

Q. Explain more about common cold

Q. Damage to thymus in a child may lead to:

1. loss of effector B cells in the body
2. a reduction in stem cell production
3. loss of antibody mediated immunity
4. loss of effector T cells in the body

Q. Select the incorrect option with respect to bird flu?

1. It is also known as avian influenza
2. It is caused by H5N1 virus
3. It is not a contagious disease
4. It can be transmitted to human beings

Q. Plague is transmitted by.

Q. ELISA (ENZYME LINKED IMMUNO SORBENT ESSSAY) NOTES FOR 4 MARKS QUESTIONS

Q. The DNA extraction process follows a number of steps to obtain pure DNA free from other contaminants or macromolecules.
The image below depicts which step of DNA extraction?

1. Cell lysis
2. Precipitation and spooling
3. Enzymatic treatment
4. Addition of chilled ethanol

Q.

BCG vaccine is used for typhoid.

1. True
2. False