Tag: biology

Questions Related to biology

AIDS related complex or ARC is 

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  1. Initial form of AIDS

  2. Not linked to AIDS

  3. Severe form of AIDS

  4. Non of the above

Show answer
Correct Option: A
Explanation:

AIDS-related complex or ARC is the initial phase of infection with the human immunodeficiency virus (HIV) and it includes symptoms such as low-grade fever, weight loss, diarrhea, bacterial/fungal infections etc. Whereas AIDS or Acquired Immune Deficiency Syndrome is the advanced form of HIV infection.
So, the correct answer is 'Initial form of AIDS'.

Among the following, most dangerous STD is caused by

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  1. Treponema pallidum

  2. Human immunodeficiency virus

  3. Neisseria gonorrhoeae

  4. Hepatitis B virus

Show answer
Correct Option: A
Explanation:

STD are sexually transmitted diseases that are transmitted through sexual contact. Treponema pallidum is a bacterium that causes syphilis disease. Human immunodeficiency virus (HIV) causes AIDS. Neisseria gonorrhoeae is a bacterium that causes Gonorrhea disease. Hepatitis B virus causes hepatitis disease. Out of these diseases, Syphilis is very difficult to diagnose. Hence, this makes it the most dangerous STD.

Thus, the correct answer is 'Treponema pallidum.'

Match the columns

i) Yeast a) Causing AIDS
ii) Virus b) Baking of bread
iii) Rhizobium c) Fixing nitrogen
biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

  1. I- c, II- b, III- a

  2. I- a, II- b, III- c

  3. I- b, II- a, III- c

  4. I- b, II- c, III- a

Show answer
Correct Option: C
Explanation:

  1. Yeast -  Saccharomyces cerevisiae is the scientific name for baker's yeast.
  2. Virus - HIV or Human immunodeficiency virus is the virus which causes AIDS
  3. Rhizobium - These are the bacteria that fix nitrogen after becoming established inside the root nodules of legumes.
 So the correct answer is I- b, II-a, III- c.

Gonorrhoea is caused by

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  1. Bacteria

  2. Virus

  3. Fungi

  4. Protozoa

Show answer
Correct Option: A
Explanation:

The sexually transmitted diseases also called venereal diseases, are spread by sexual intercourse with an infected person. The major venereal diseases are syphilis and gonorrhea. Gonorrhoea is caused by a diplococcus bacterium, Neisseria gonorrhoeae. The victim feels burning sensation and pain during urination. Thus option A is the correct answer.

Organ that can be affected by untreated syphilis is

biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

  1. Heart

  2. Brain

  3. Liver

  4. Both A and B

Show answer
Correct Option: D
Explanation:

 Syphilis is a sexually transmitted disease, that is caused by a parasite. Untreated Syphilis or tertiary syphilis can affect both heart & brain. Its symptoms vary depending on the organ system affected. 

So, the correct option is 'Both A and B'.

Which of the following is STD?

biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

  1. Cancer

  2. Malaria

  3. Pneumonia

  4. Trichomoniasis

Show answer
Correct Option: D
Explanation:

Trichomoniasis is a sexually transmitted disease. It is caused by Trichomonas vaginalis.
Malaria is caused by Plasmodium sp and pneumonia by Diplococcus pneumonia. 

Cancer is caused by mutated DNA in the body cells.
Thus, the correct answer is (D).

A sexually transmitted disease caused by bacteria is 

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  1. Leprosy

  2. AIDS

  3. Syphilis

  4. Pertussis

Show answer
Correct Option: C
Explanation:

Syphilis is a type of sexually transmitted disease , which is caused by a bacteria . It starts as painless sores . It is caused by the bacteria Treponema pallidum . So the correct option is 'syphilis' . 

Which of the following STDs are not completely curable?

biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

  1. Chlamydiasis, gonorrhoea, trichomoniasis

  2. Chancroid, syphilis, genital warts

  3. AIDS, syphilis, hepatitis B

  4. AIDS, genital herpes, hepatitis B

Show answer
Correct Option: D
Explanation:

AIDS, genital herpes and hepatitis B are not completely curable STDs. AIDS is caused by Human Immunodeficiency Virus. Genital herpes is caused by Herpes Simplex Virus and hepatitis B is caused by Hepatitis B Virus.

Confirmatory test for STDs is

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  1. ELISA

  2. PCR

  3. DNA hybridisation

  4. all of these

Show answer
Correct Option: D
Explanation:

Confirmatory tests for STDs are culture and microscopic observation with specific staining, detection of specific antigen/antibody using Enzyme Linked Immunosorbent Assay (ELISA), DNA hybridisation and polymerase chain reaction (PCR).

It is normally a rare cancer but became a marker of AIDS/ HIV patients.

biology world of microbes cancer and aids hiv and aids immunity related disorders and problems

  1. Squamous cell carcinoma

  2. Retinoblastoma

  3. Kaposi's sarcoma

  4. Lukaemia

Show answer
Correct Option: C
Explanation:
  1. Squamous cell carcinoma is a type of skin cancer occurs due to an uncontrolled division of squamous epithelium.
  2. Retinoblast is cancer caused due to a rapid division of immature cells of the retina.
  3. It is the type of rare cancer that forms masses over several organs like skin, lymph nodes and other parts of the body and skin lesions are found to be purple in color. Since poor immunity and chronic lymphedema are basic causes so it can be considered the marker of HIV/AIDS as it weakens the immune system. In the lesions, the herpes virus is mostly identified.
  4. Leukemia is cancer caused by the division of damaged WBC.
So the correct option is "Kaposi's sarcoma".