NEET Practice Questions (MCQs) with Answers & Solutions

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.

Amniocentesis is a medical procedure in which fluid is taken from the place developing foetus. It helps in determining any genetic abnormalities as well as sex of the developing foetus 

Daily oral contraceptive pills in India are commonly referred to as Mala M and Mala D. These pills are part of the family planning programs and are effective in preventing pregnancy when taken regularly.