NCERT Class 10 Science — Chapter 3: How do Organisms Reproduce?

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How many of the following are listed as bacterial sexually transmitted infections: gonorrhoea, syphilis, warts, HIV-AIDS?

Official previous-year question

Verified 1 Aug 2026.

Options

AFour
BThree
COne
DTwo

Did you get this right?

Solution

The correct option is Two.

Explanation

Sexually Transmitted Infections (STIs) are caused by a variety of pathogens, primarily bacteria, viruses, and parasites. Distinguishing the causative agent is essential as it determines the treatment approach; bacterial STIs are typically treated with antibiotics, while viral STIs are managed with antivirals or symptom-based treatments.

Analysis of the Listed Infections:

Gonorrhoea: This is a bacterial infection caused by Neisseria gonorrhoeae. It primarily affects the mucous membranes of the reproductive tract.
Syphilis: This is a bacterial infection caused by the bacterium Treponema pallidum. It is characterized by distinct stages of progression if left untreated.
Warts (Genital Warts): These are viral infections caused by the Human Papillomavirus (HPV).
HIV-AIDS: This is a viral infection caused by the Human Immunodeficiency Virus (HIV), which attacks the body's immune system.

Thus, only two of the listed infections (Gonorrhoea and Syphilis) are bacterial in origin.

Key Takeaway: Gonorrhoea, Syphilis, and Chlamydiasis are major bacterial STIs. HIV-AIDS, Genital Herpes, Genital Warts, and Hepatitis B are major viral STIs.

Your note

More from Chapter 3: How do Organisms Reproduce?

With reference to vegetative propagation in plants, consider the following statements: 1. It can result in earlier flowering and fruiting than seed propagation. 2. It enables multiplication of plants that no longer produce seeds. 3. It helps maintain parental traits due to genetic similarity. 4. It is not used for grapes. Which of the statements given above are correct?

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Consider the following statements about the male reproductive tract: 1. The vas deferens enters the kidney directly. 2. The urethra serves as a common passage for sperm and urine. 3. Secretions from accessory glands make transport easier and provide nutrition. Which of the statements given above are correct?

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In human reproduction, fertilisation normally occurs at, and implantation occurs at, respectively:

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In which of the following organisms does the body break into fragments upon maturation, with each fragment growing into a new individual?

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Assertion (A): The creation of a DNA copy is a basic event in reproduction. Reason (R): A newly copied DNA strand can survive and function independently without the original cellular apparatus.

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The correct option is Two.

Explanation

Analysis of the Listed Infections:

Gonorrhoea: This is a bacterial infection caused by Neisseria gonorrhoeae. It primarily affects the mucous membranes of the reproductive tract.
Syphilis: This is a bacterial infection caused by the bacterium Treponema pallidum. It is characterized by distinct stages of progression if left untreated.
Warts (Genital Warts): These are viral infections caused by the Human Papillomavirus (HPV).
HIV-AIDS: This is a viral infection caused by the Human Immunodeficiency Virus (HIV), which attacks the body's immune system.

Thus, only two of the listed infections (Gonorrhoea and Syphilis) are bacterial in origin.

Key Takeaway: Gonorrhoea, Syphilis, and Chlamydiasis are major bacterial STIs. HIV-AIDS, Genital Herpes, Genital Warts, and Hepatitis B are major viral STIs.