Zoology MCQs for NEET — Practice Questions with Answers

Gonorrhea is caused by the bacterium Neisseria gonorrhoeae. This bacterium infects the mucous membranes of the reproductive tract, including the cervix, uterus, and fallopian tubes in women, and the urethra in both women and men.

One of the main methods for diagnosing STDs (Sexually Transmitted Diseases) is the identification of the pathogen by culturing them. This method involves growing the pathogen in a controlled environment to identify its presence.

AIDS (Acquired Immunodeficiency Syndrome) is diagnosed by the identification of antibodies against HIV (Human Immunodeficiency Virus) antigens. This is typically done through blood tests that detect the presence of these antibodies.

PCR stands for Polymerase Chain Reaction. It is a technique used in molecular biology to amplify a single or a few copies of a segment of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.

The principles to prevent sexually transmitted diseases (STDs) include avoiding sex with unknown persons, always using a condom during coitus, and consulting a doctor for treatment if there is any doubt about having an STD. Thus, all the given options are correct.

One of the symptoms of Trichomoniasis, which is a sexually transmitted infection caused by a parasite, includes itching in and around the vagina. This is a common symptom that helps in the identification and diagnosis of the infection.

Infertility is defined as the inability to conceive children after one year of regular, unprotected sexual intercourse. Therefore, the correct answer is 'Unable to produce children'.

GIFT stands for Gamete Intrafallopian Transfer, which is a technique used in assisted reproductive technology. Gametes (eggs and sperm) are placed directly into a woman's fallopian tubes. Thus, the correct answer is 'Gamete Intrafallopian transfer'.

Population explosion typically leads to numerous challenges such as increased rate of industrialization and urbanization, encroachment on land, air, and water, and scarcity of resources like food, habitat, and clothing. It does not inherently mean that a country develops more; in fact, it often leads to more strain on resources. Therefore, 'country develops more' is not true for population explosion.

Contraceptive pills typically contain a combination of progesterone and estrogen. These hormones work together to prevent ovulation, thicken cervical mucus to block sperm, and thin the lining of the uterus to prevent implantation.