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Q1. The sex chromosomes in a human male are represented as:
Human males have one X chromosome and one Y chromosome, represented as XY. The X chromosome comes from the mother and the Y chromosome comes from the father. The presence of the Y chromosome determines maleness. Females have XX chromosomes.
Q2. The sex chromosomes in a human female are represented as:
Human females have two X chromosomes, represented as XX. Both X chromosomes are contributed by the parents (one from the mother and one from the father). Males have XY chromosomes. The presence of XX chromosomes determines femaleness.
Q3. The thyroid gland is located in the:
The thyroid gland is located in the neck, just below the Adam’s apple. It is a butterfly-shaped gland that produces thyroxine, which regulates metabolism. The pituitary gland is in the brain, the pancreas is in the abdomen, and the chest contains the heart and lungs.
Q4. The hormone secreted by the thyroid gland is called:
The thyroid gland secretes the hormone thyroxine. Thyroxine regulates the body’s metabolic rate, growth, and development. Insulin is secreted by the pancreas, adrenaline by the adrenal glands, and testosterone by the testes.
Q5. Thyroxine regulates which of the following functions in the body?
Thyroxine regulates the body’s metabolic rate, which is how quickly the body uses energy and produces heat. Insulin regulates blood sugar, adrenaline controls the fight-or-flight response, and sex hormones control the growth of reproductive organs.
Q6. Deficiency of iodine in the diet can lead to a deficiency of:
Iodine is an essential component of thyroxine. A deficiency of iodine in the diet leads to a deficiency of thyroxine, which can cause goiter (enlargement of the thyroid gland). Iodine does not affect insulin, adrenaline, or estrogen production directly.
Q7. The hormone insulin is secreted by the:
Insulin is secreted by the pancreas. It regulates blood sugar levels by helping cells absorb glucose. The thyroid secretes thyroxine, the pituitary secretes many hormones, and the adrenal glands secrete adrenaline.
Q8. The function of insulin is to:
Insulin decreases blood sugar level by promoting the uptake of glucose into cells and its storage as glycogen. If insulin is insufficient, blood sugar levels rise, leading to diabetes. It does not increase blood sugar, increase metabolic rate, or prepare the body for stress.
Q9. Insufficient production of insulin leads to a condition called:
Insufficient production of insulin leads to diabetes mellitus, a condition characterized by high blood sugar levels. Goiter is caused by iodine deficiency, gigantism is caused by excess growth hormone, and acromegaly is caused by excess growth hormone in adults.
Q10. The hormone adrenaline is secreted by the:
Adrenaline is secreted by the adrenal glands, which are located on top of the kidneys. It prepares the body for stressful situations. The thyroid secretes thyroxine, the pituitary secretes growth hormone and others, and the pancreas secretes insulin.
Q11. Adrenaline is also known as:
Adrenaline is known as the “fight or flight” hormone because it prepares the body to respond to stressful or emergency situations. It increases heart rate, blood pressure, and energy supply. Growth hormone controls growth, melatonin controls sleep, and ghrelin controls hunger.
Q12. During an emergency, adrenaline causes:
During an emergency, adrenaline increases blood flow to muscles and the heart, preparing the body for action. It also increases heart rate and breathing rate. It does not decrease heart rate, decrease breathing, or slow down reflexes.
Q13. The transformation of a larva into an adult through significant changes is called:
Metamorphosis is the transformation of a larva into an adult through significant changes. This occurs in insects like butterflies and amphibians like frogs. Reproduction is the process of producing offspring, fertilization is the fusion of gametes, and germination is the growth of a seed.
Q14. The hormone responsible for metamorphosis in insects and frogs is produced by:
In frogs, the thyroid gland produces thyroxine, which controls metamorphosis. In insects, hormones from the brain and prothoracic glands control metamorphosis. The pituitary, adrenal, and pancreas are not primarily responsible for metamorphosis.
Q15. In frogs, the transformation of a tadpole into an adult frog is controlled by:
In frogs, the transformation of a tadpole into an adult frog is controlled by thyroxine, a hormone produced by the thyroid gland. Thyroxine promotes the development of legs and the loss of the tail. Insulin, adrenaline, and estrogen are not involved in amphibian metamorphosis.
Q16. In insects, the process of metamorphosis is regulated by:
In insects, metamorphosis is regulated by growth hormones and molting hormones (ecdysone). These hormones control the molting and transformation from larva to pupa to adult. Sex hormones are involved in reproduction, not metamorphosis, and insulin and adrenaline are not involved.
Q17. A tadpole breathes through:
A tadpole breathes through gills, which are adapted for aquatic life. As it metamorphoses into an adult frog, it develops lungs and also breathes through its skin. Lungs are present in adult frogs, trachea is used by insects, and skin only is not sufficient for a tadpole.
Q18. During metamorphosis of a tadpole, the hormone thyroxine causes the:
During metamorphosis, thyroxine causes the development of legs and the loss of the tail in tadpoles. This transformation prepares the frog for life on land. Gills are present in the tadpole before metamorphosis, and the tail is lost, not grown. The egg is formed before metamorphosis.
Q19. The life cycle of a butterfly includes which of the following stages?
The life cycle of a butterfly includes four stages: egg, larva (caterpillar), pupa (chrysalis), and adult. This is called complete metamorphosis. Egg, nymph, adult is the life cycle of a grasshopper (incomplete metamorphosis), and tadpole is the larval stage of a frog.
Q20. The larva of a butterfly is called a:
The larva of a butterfly is called a caterpillar. It is the feeding stage of the life cycle. A tadpole is the larva of a frog, a nymph is the larva of a grasshopper (incomplete metamorphosis), and a pupa is the resting stage between larva and adult.
Q21. The nutritional needs of adolescents are higher than those of children because:
Adolescents have higher nutritional needs because they undergo rapid growth and development during puberty. Their bodies require more energy and nutrients for growth, bone development, and hormonal changes. They are not less active, and gaining weight is only one aspect of their growth.
Q22. Which of the following nutrients is most important for the growth and repair of body tissues during adolescence?
Proteins are most important for the growth and repair of body tissues. During adolescence, rapid growth requires a high protein intake. Carbohydrates provide energy, fats store energy, and vitamins are essential for various bodily functions, but proteins are the building blocks of tissues.
Q23. Which mineral is particularly important for adolescent girls due to the onset of menstruation?
Iron is particularly important for adolescent girls because of the onset of menstruation, which leads to loss of blood and iron. Iron is needed to prevent anemia. Calcium is important for bones, iodine for thyroid function, and phosphorus for energy metabolism.
Q24. Which mineral is essential for the formation of strong bones and teeth during adolescence?
Calcium is essential for the formation of strong bones and teeth. During adolescence, bone growth is rapid, so calcium intake is crucial. Iron is for blood, iodine for thyroid function, and sodium for fluid balance.
Q25. A balanced diet for an adolescent should include plenty of:
A balanced diet should include all essential nutrients: proteins, carbohydrates, fats, vitamins, minerals, and water. Each nutrient plays a specific role in growth and development. A diet of only fats and sugars, only fruits and vegetables, or only milk and meat is not balanced.
Q26. Which of the following is a myth about acne during adolescence?
Eating oily food directly causing acne is a myth. Acne is caused by hormonal changes that increase oil production in the skin, not directly by diet. Poor hygiene can worsen it, and proper skincare can help treat it. The myth is the direct connection between oily food and acne.
Q27. Which of the following is a myth regarding sex determination?
It is a myth that the mother determines the sex of the baby. The father determines the sex because he contributes either an X or a Y chromosome. Sex is determined by chromosomes, and the Y chromosome leads to male offspring. The myth is that the mother’s contribution determines sex.
Q28. Which of the following is a myth about height growth?
It is a myth that special exercises can increase height after puberty. Height is largely determined by genetics and stops increasing after the growth plates fuse. Proper nutrition helps achieve maximum height, and height growth depends on genetics. The myth is about exercises increasing height after puberty.
Q29. Which of the following is a myth about menstruation?
This is a myth. Menstruation is a natural process, and there is no scientific basis for girls being “impure” during menstruation. Hygiene is important, and menstruation typically occurs every 28 days. The myth is the social stigma associated with menstruation.
Q30. Which of the following is a myth about pregnancy?
This is a myth. A girl can become pregnant from her first sexual encounter if she has started ovulating. Pregnancy requires medical care, a girl can become pregnant after menarche, and proper nutrition is important during pregnancy. The myth is about the first encounter.
Q31. Which of the following is a recommended DO during adolescence?
Exercise regularly and maintain personal hygiene are recommended practices during adolescence. Staying up late, eating junk food, and avoiding questions are not recommended. Exercise and hygiene promote physical and mental well-being.
Q32. Which of the following is a recommended DON’T during adolescence?
Using unhygienic sanitary products is a recommended DON’T because it can lead to infections. Eating a balanced diet, sharing concerns with trusted adults, and getting adequate sleep are all recommended DOs. Hygiene is crucial for reproductive health.
Q33. Which of the following is a recommended DO for maintaining reproductive health?
Consulting a doctor for unusual symptoms is a recommended DO. Ignoring changes, believing myths, and avoiding physical activity (unless severe pain) are not recommended. Medical advice is important for reproductive health.
Q34. AIDS stands for:
AIDS stands for Acquired Immune Deficiency Syndrome. It is caused by HIV (Human Immunodeficiency Virus) and leads to a weakened immune system. The other options are incorrect expansions.
Q35. HIV stands for:
HIV stands for Human Immunodeficiency Virus. It is the virus that causes AIDS by attacking the immune system. The other options are incorrect expansions.
Q36. HIV/AIDS can be transmitted through:
HIV is transmitted through unprotected sexual contact, blood transfusion, sharing needles, and from mother to baby. It is NOT transmitted through sharing food, hugging, or mosquito bites. The correct mode among the options is unprotected sexual contact.
Q37. Which of the following is NOT a mode of HIV transmission?
HIV is NOT transmitted by using the same toilet seat. It is transmitted through blood, sexual contact, sharing needles, and from mother to baby. Casual contact like sharing a toilet seat does not transmit HIV.
Q38. The full form of ART in the context of HIV treatment is:
ART stands for Anti-Retroviral Therapy. It is the treatment used to manage HIV infection by suppressing the virus. The other options are incorrect.
Q39. Which of the following is a myth about HIV transmission?
It is a myth that HIV can be transmitted through mosquito bites. HIV is not spread by mosquitoes. Blood transfusion, mother-to-child transmission, and unprotected sex are real modes of transmission. The myth is about mosquitoes.
Q40. Adolescent pregnancy is considered high-risk because:
Adolescent pregnancy is high-risk because the adolescent body is not fully developed for childbirth, leading to health risks for both mother and baby. It is not a myth, and it affects both mother and baby.
Q41. Which of the following is a consequence of adolescent pregnancy?
A consequence of adolescent pregnancy is health risks for both mother and baby, including complications during childbirth. It often leads to decreased educational opportunities and economic instability, not the opposite.
Q42. Which of the following is a DO for preventing adolescent pregnancy?
Communicating openly with parents and trusted adults about reproductive health is a DO for preventing adolescent pregnancy. Avoiding information, believing myths, and ignoring sex education are NOT recommended.
Q43. The hormone thyroxine contains which essential element?
Thyroxine contains iodine as an essential element. Iodine is necessary for the synthesis of thyroxine. Iron is for hemoglobin, calcium for bones, and sodium for fluid balance.
Q44. Deficiency of thyroxine in children can lead to a condition called:
Deficiency of thyroxine in children can lead to cretinism, a condition characterized by stunted physical and mental development. Goiter is an enlarged thyroid, diabetes is insulin-related, and gigantism is excess growth hormone.
Q45. Enlargement of the thyroid gland due to iodine deficiency is called:
Enlargement of the thyroid gland due to iodine deficiency is called goiter. Diabetes is insulin-related, gigantism is excess growth hormone, and acromegaly is excess growth hormone in adults.
Q46. In the life cycle of a frog, the tadpole develops into an adult frog through the action of:
In the life cycle of a frog, the tadpole develops into an adult frog through the action of thyroxine. Thyroxine promotes the development of legs and the loss of the tail. Insulin, adrenaline, and testosterone are not involved in this process.
Q47. Which of the following is a myth about diet and growth during adolescence?
It is a myth that eating more will always make you taller. Height is determined by genetics and nutrition, but eating more than necessary does not increase height beyond genetic potential. A balanced diet, milk, and iron are important.
Q48. Which of the following is a recommended DON’T regarding HIV/AIDS?
Discriminating against people living with HIV is a recommended DON’T. People with HIV should be treated with dignity and respect. Using sterilized needles, practicing safe sex, and getting tested are recommended DOs.
Q49. The stage in the life cycle of a butterfly where the caterpillar transforms into an adult is called the:
The stage where the caterpillar transforms into an adult is the pupal stage (chrysalis). The larval stage is the caterpillar, the egg stage is the first stage, and the adult stage is the final stage. Metamorphosis occurs during the pupal stage.
Q50. Why is it important for adolescents to understand the role of hormones in the life cycle of insects and frogs?
It is important for adolescents to understand that hormones regulate growth and development across different species. This knowledge helps in understanding biological processes and the role of hormones in their own bodies. It is not only about controlling insects, becoming veterinarians, or learning about animal reproduction only.