501. Which effect is especially associated with anabolic steroid misuse in adolescents?
ⓐ. Stunted growth
ⓑ. Enhanced social maturity
ⓒ. Permanent resistance to addiction
ⓓ. Faster wound healing without risk
Correct Answer: Stunted growth
Explanation: Adolescence is a period of active growth, so hormonal disturbance during this stage can have especially harmful consequences. Misuse of anabolic steroids may interfere with normal growth processes and result in stunted growth. This makes adolescent abuse particularly dangerous. The effect can be long-lasting and difficult to reverse.
502. Which statement best explains why intravenous drug abuse has consequences beyond addiction itself?
ⓐ. It completely prevents all future infections.
ⓑ. It turns every abused substance into a nutrient.
ⓒ. It guarantees harmless tolerance without dependence.
ⓓ. It can add the risk of serious blood-borne diseases to the direct toxic effects of the drug.
Correct Answer: It can add the risk of serious blood-borne diseases to the direct toxic effects of the drug.
Explanation: Intravenous drug abuse is dangerous not only because of the substance being taken, but also because of the route used. Shared needles may transmit infections such as HIV and Hepatitis B through blood contact. At the same time, the drug itself may damage the brain, liver, and behaviour. The danger therefore comes from both infection risk and substance toxicity.
503. Assertion (A): Substance abuse in sport is harmful even when it is done for performance improvement.
Reason (R): Drugs such as anabolic steroids and other misused substances can produce serious side effects.
ⓐ. Both A and R are true, but R is not the correct explanation of A.
ⓑ. Both A and R are true, and R is the correct explanation of A.
ⓒ. A is true, but R is false.
ⓓ. A is false, but R is true.
Correct Answer: Both A and R are true, and R is the correct explanation of A.
Explanation: Performance improvement does not make harmful drug use safe. Substances misused in sport can disturb normal physiology and produce serious effects in males, females, and adolescents. Because of these risks, misuse remains harmful regardless of the motive. The reason therefore directly explains the assertion.
504. Fill in the blank in the most accurate way:
Among the long-term consequences of drug abuse, repeated intravenous use is especially feared because it increases the risk of AIDS and ______.
ⓐ. typhoid
ⓑ. malaria
ⓒ. Hepatitis B
ⓓ. ringworm
Correct Answer: Hepatitis B
Explanation: Shared needles create a direct blood-to-blood route for transmission of certain infections. Along with AIDS, Hepatitis B is another major risk. This is why intravenous drug abuse is associated with dangers that go beyond dependence itself. Repeated needle sharing therefore has serious infectious consequences.
505. Which statement best expresses the central principle for dealing with drug and alcohol abuse?
ⓐ. Prevention is better than cure.
ⓑ. Abuse can be corrected only after severe dependence develops.
ⓒ. Prevention matters only for adults and not for adolescents.
ⓓ. The problem should be ignored unless overdose occurs.
Correct Answer: Prevention is better than cure.
Explanation: Substance abuse often begins with experimentation and may gradually progress into addiction, dependence, and social damage. Once this progression becomes established, recovery is usually more difficult and may require long-term support. That is why preventing the beginning of abuse is more effective than waiting to treat severe consequences later. Early prevention protects health, behaviour, and relationships.
506. Which role of parents is most helpful in preventing substance abuse in adolescents?
ⓐ. Allowing complete isolation from family life
ⓑ. Ignoring behaviour changes unless crime occurs
ⓒ. Providing support, guidance, and open communication
ⓓ. Using fear alone as the main method of control
Correct Answer: Providing support, guidance, and open communication
Explanation: A supportive family environment reduces the chance that an adolescent will turn to harmful substances for relief, excitement, or social acceptance. Open communication helps parents notice early warning signs and guide the child without pushing them toward secrecy. Emotional support also makes it easier for adolescents to seek help when confused or stressed. Prevention works better in a climate of trust than in one of neglect or fear.
507. Which action by teachers is most directly helpful in prevention of substance abuse?
ⓐ. Punishing every student who appears withdrawn
ⓑ. Avoiding discussion of stress and peer pressure
ⓒ. Treating substance abuse as only a family matter
ⓓ. Providing education, counselling, and early guidance
Correct Answer: Providing education, counselling, and early guidance
Explanation: Teachers often observe behavioural changes before anyone else because they see students regularly in structured settings. Through education and counselling, they can help students understand risks, resist pressure, and seek help early. Guidance from teachers is especially useful when academic decline or mood changes begin to appear. Their role is preventive and supportive, not merely disciplinary.
508. Which step is most directly aimed at reducing substance abuse caused by social influence?
ⓐ. Increasing unsupervised leisure time
ⓑ. Avoiding undue peer pressure
ⓒ. Delaying all discussion until adulthood
ⓓ. Treating curiosity as harmless in every case
Correct Answer: Avoiding undue peer pressure
Explanation: Peer pressure is one of the strongest social causes of first-time experimentation in adolescence. Learning to resist harmful influence helps prevent the transition from curiosity to regular use. This does not mean avoiding friendships, but rather learning to reject unsafe group behaviour. Reducing undue peer pressure is therefore a practical and specific preventive step.
509. Which activity best represents healthy channelising of adolescent energy to reduce risk of substance abuse?
ⓐ. Isolating oneself from all recreation
ⓑ. Suppressing all curiosity without guidance
ⓒ. Engaging in sports, hobbies, and constructive interests
ⓓ. Depending only on medicines to control behaviour
Correct Answer: Engaging in sports, hobbies, and constructive interests
Explanation: Adolescents often have strong emotional energy, curiosity, and desire for excitement. Constructive activities such as sports, music, art, reading, or other hobbies provide healthy outlets for that energy. These pursuits reduce idle experimentation and can strengthen confidence and social support. Positive engagement is therefore an important protective factor.
510. A student feels pressured by friends to try an intoxicating substance for the first time. Which response is most appropriate for prevention?
ⓐ. Seeking help from parents, teachers, or trusted friends
ⓑ. Trying the substance once to avoid embarrassment
ⓒ. Hiding the situation and remaining silent
ⓓ. Assuming one experiment can never become risky
Correct Answer: Seeking help from parents, teachers, or trusted friends
Explanation: Asking for help early is one of the safest responses when pressure begins. Trusted adults or sensible peers can provide support, practical advice, and emotional backing to resist the situation. Silence and secrecy often increase vulnerability rather than reducing it. Early help-seeking is therefore a strong preventive strategy.
511. Which of the following is the best example of preventive counselling in substance-abuse control?
ⓐ. Waiting until overdose occurs before speaking to the person
ⓑ. Giving only punishment without explanation
ⓒ. Avoiding all discussion of emotional stress
ⓓ. Helping the person understand risks, triggers, and coping alternatives
Correct Answer: Helping the person understand risks, triggers, and coping alternatives
Explanation: Counselling works by helping the person think clearly about harmful patterns, emotional triggers, and safer ways to cope. It is more effective when it builds understanding rather than relying only on fear or punishment. This can be especially important in adolescents facing stress, curiosity, or peer influence. Good counselling therefore supports both awareness and behaviour change.
512. Which sign should prompt early preventive attention from family or teachers?
ⓐ. Regular hygiene and steady academic performance
ⓑ. Unexplained absence, isolation, and mood changes
ⓒ. Increased interest in healthy exercise
ⓓ. Consistent sleep routine and balanced meals
Correct Answer: Unexplained absence, isolation, and mood changes
Explanation: Warning signs often appear before severe addiction develops. Unexplained absence, withdrawal from normal relationships, and sudden mood changes may signal a developing problem that needs attention. Recognizing such signs early allows support, counselling, and intervention before more serious damage occurs. Prevention often begins with observation.
513. Which statement best describes the role of de-addiction and rehabilitation centres?
ⓐ. They are needed only for infectious diseases.
ⓑ. They are useful only after every family effort has completely failed.
ⓒ. They provide professional medical and supportive help for recovery from substance abuse.
ⓓ. They are mainly meant to isolate people permanently from society.
Correct Answer: They provide professional medical and supportive help for recovery from substance abuse.
Explanation: De-addiction and rehabilitation centres are designed to help people recover from dependence and harmful patterns of use. Their support may include medical care, counselling, supervision, and behavioural rehabilitation. These centres are not meant for punishment or permanent separation from society. Their purpose is recovery and reintegration with healthier functioning.
514. Which approach is most useful when an adolescent begins showing early warning signs of substance abuse?
ⓐ. Early supportive intervention rather than delay
ⓑ. Public humiliation to create fear
ⓒ. Ignoring the behaviour until final examinations end
ⓓ. Assuming the problem will always disappear on its own
Correct Answer: Early supportive intervention rather than delay
Explanation: Early action can prevent experimentation from progressing into addiction and dependence. Supportive intervention helps identify triggers, correct misconceptions, and connect the person with guidance or treatment if needed. Delay often allows the problem to deepen and become harder to manage. Timely response is therefore more effective than waiting.
515. Assertion (A): Professional help may be necessary in some cases of substance abuse.
Reason (R): Dependence and withdrawal may require medical and rehabilitative support.
ⓐ. Both A and R are true, but R is not the correct explanation of A.
ⓑ. A is true, but R is false.
ⓒ. A is false, but R is true.
ⓓ. Both A and R are true, and R is the correct explanation of A.
Correct Answer: Both A and R are true, and R is the correct explanation of A.
Explanation: Substance abuse does not always remain at the level of simple experimentation. When dependence and withdrawal develop, professional support may be needed to manage physical symptoms, emotional instability, and recovery planning. Rehabilitation can also help prevent relapse and rebuild normal functioning. The reason directly explains why professional help is sometimes essential.
516. Which statement about prevention of substance abuse is correct?
ⓐ. It depends only on strict punishment.
ⓑ. It includes family support, education, counselling, healthy engagement, early warning-sign detection, and professional help when needed.
ⓒ. It becomes useful only after long-term organ damage has appeared.
ⓓ. It is unrelated to peer influence or stress.
Correct Answer: It includes family support, education, counselling, healthy engagement, early warning-sign detection, and professional help when needed.
Explanation: Effective prevention is broad and practical rather than based on one single measure. Family support, school guidance, counselling, healthy activities, attention to warning signs, and access to professional help all contribute to reducing risk. This is important because substance abuse usually has psychological, social, and behavioural causes. A complete preventive approach therefore works better than punishment or delay alone.
517. Which statement correctly compares colostrum and vaccination?
ⓐ. Both provide passive immunity through ready-made antibodies.
ⓑ. Both protect only by strengthening innate physical barriers.
ⓒ. Colostrum induces a primary immune response in the newborn, whereas vaccination gives only temporary passive protection.
ⓓ. Colostrum provides natural passive immunity, whereas vaccination usually induces active immunity.
Correct Answer: Colostrum provides natural passive immunity, whereas vaccination usually induces active immunity.
Explanation: Colostrum contains maternal antibodies, especially IgA, that are transferred directly to the newborn. This makes it an example of natural passive immunity because the infant does not produce those antibodies at that moment. Vaccination, in contrast, stimulates the body to produce its own response and memory. The two therefore differ mainly in the source of protection.
518. A person bitten by a venomous snake is given preformed antiserum for immediate protection. This is an example of
ⓐ. active immunity
ⓑ. passive immunity
ⓒ. innate immunity
ⓓ. cell-mediated immunity
Correct Answer: passive immunity
Explanation: Antiserum already contains antibodies formed outside the patient’s body. Because these antibodies are supplied directly, protection begins quickly without waiting for the person’s own immune system to respond. That is why this is classified as passive immunity. The speed of action is especially important in emergencies such as snakebite.
519. A virus-infected body cell is destroyed mainly through the action of T-lymphocytes rather than by free antibodies circulating in blood. This response is best classified as
ⓐ. cell-mediated immunity
ⓑ. passive immunisation
ⓒ. humoral immunity
ⓓ. physiological barrier defense
Correct Answer: cell-mediated immunity
Explanation: Cell-mediated immunity depends mainly on T-lymphocytes and is especially important when infected cells themselves must be targeted. Humoral immunity works more through antibodies in body fluids. The clue here is direct cellular attack by T cells. That makes the response cell-mediated rather than humoral.
520. Which statement about HIV infection and AIDS is most accurate?
ⓐ. Every HIV infection becomes full AIDS within a week.
ⓑ. HIV infection and AIDS always appear at the same time.
ⓒ. A person may remain infected with HIV for years before full AIDS develops.
ⓓ. AIDS begins only after repeated casual contact with infected people.
Correct Answer: A person may remain infected with HIV for years before full AIDS develops.
Explanation: HIV infection and AIDS are related, but they are not identical in timing. There is usually a long lag period, often about 5 to 10 years, before severe immune deficiency becomes fully evident. During this interval, the person may appear relatively healthy. This delay is one of the important features of HIV disease progression.
