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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 1601. |
Growth hormone of pituitary is more effective in: |
| A. | Presence of thyroxine |
| B. | Absence of thyroxine |
| C. | Absence of insulin |
| D. | Presence of adrenaline |
| Answer» B. Absence of thyroxine | |
| 1602. |
If thyroxine is added in a beaker which has some small tadpoles then: |
| A. | All tadpoles die. |
| B. | They metamorphose very fast. |
| C. | They develop small body. |
| D. | They develop a giant body. |
| Answer» C. They develop small body. | |
| 1603. |
Which of the followings is the more scientific definition of hormone? |
| A. | They are extracellular messengers. |
| B. | They always act at distantly located target organs. |
| C. | They are the products of well organised endocrine glands. |
| D. | They are non-nutrient chemicals that act as intercellular messengers. |
| Answer» E. | |
| 1604. |
Mainly which type of hormones control the menstrual cycle in woman? |
| A. | FSH |
| B. | LH |
| C. | FSH, LH, oestrog |
| D. | e Progesterone |
| Answer» D. e Progesterone | |
| 1605. |
Heterocrine glands are the glands, which: |
| A. | Work as exocrine glands. |
| B. | Work as endocrine glands. |
| C. | Have dual (exo- and endocrine) mode of function. |
| D. | None of the above |
| Answer» D. None of the above | |
| 1606. |
Most of the contraceptive pills contain: |
| A. | Oestrogen + FSH |
| B. | Progesterone + LH |
| C. | FSH+LH |
| D. | Oestrogen + Progesterone |
| Answer» E. | |
| 1607. |
If a human female starts developing male characteristics like beard, degeneration of uterus and ovaries, enlargement of clitoris etc. It may be due to: |
| A. | Overproduction of oestrogen and testosterone |
| B. | Damage to posterior pituitary. |
| C. | Over production of adrenal androgens. |
| D. | Surgical removal of mammary gland. |
| Answer» D. Surgical removal of mammary gland. | |
| 1608. |
Sella tursica is a depression lodging: |
| A. | Pituitary |
| B. | Pineal |
| C. | Adrenal |
| D. | Thyroid |
| Answer» B. Pineal | |
| 1609. |
Pineal body develops from: |
| A. | Dorsal part of diencephalon |
| B. | Ventral part of diencephalon |
| C. | Ventral side of cerebellum |
| D. | Lateral s0ide of cerebrum |
| Answer» B. Ventral part of diencephalon | |
| 1610. |
The primary difference between sex hormones in general and gonadotropins specifically is that gonadotropins: |
| A. | Are produced before birth only. |
| B. | Are present only in one sex. |
| C. | Cease functioning at puberty |
| D. | Influence the production of gametes specifically, while sex hormones have a wide variety of primary and secondary roles in sex development and determination. |
| Answer» E. | |
| 1611. |
Hormone relaxin is meant for: |
| A. | Release of ova from ovary. VSSP |
| B. | Relaxing uterus to prevent abortion. |
| C. | Relaxing pubic symphysis. |
| D. | The contraction of uterus for child birth. |
| Answer» D. The contraction of uterus for child birth. | |
| 1612. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Adrenaline I. Myxoedema B. Hyperparathyroidism II. Accelerates heart beat C. Oxytocin III. Salt-water balance D. Hypothyroidism IV. Childbirth E. Aldosterone V. Demineralisation |
| A. | A-II; B-V; C-IV; D-I; E-III |
| B. | A-III; B-IV; C-V; D-I; E-II |
| C. | A-V; B-III; C-II; D-IV; E-I |
| D. | A-II; B-III; C-IV; D-V; E-I |
| Answer» B. A-III; B-IV; C-V; D-I; E-II | |
| 1613. |
Complete failure of the anterior lobe of pituitary causes: |
| A. | Conn's disease |
| B. | Acromegaly |
| C. | Cushing's disease |
| D. | Simmond's disease |
| Answer» E. | |
| 1614. |
A decrease in the level of oestrogen and progesterone causes: |
| A. | Growth and dilation of myometrium. |
| B. | Growth of endometrium. |
| C. | Constriction of uterine blood vessels leading to sloughing of endometrium or uterine epithelium. |
| D. | Release of ovum from the ovary. |
| Answer» D. Release of ovum from the ovary. | |
| 1615. |
Which of the following statement(s) is/are correct? (i) Maximum iodine is stored in thyroid gland (ii) Calcitonin is non-iodinised hormone secreted by parafollicular cells of thyroid gland. (iii) Calcitonin (TCT) regulates the blood \[C{{a}^{+2}}\] level. (iv) TCT is hypocalcemic factor. |
| A. | All of these |
| B. | None of these |
| C. | (i), (ii) and (iii) |
| D. | Only (iv) |
| Answer» B. None of these | |
| 1616. |
Antiageing hormone is: |
| A. | Thyroxine |
| B. | Melatonin |
| C. | Estrogen |
| D. | Testosterone |
| Answer» C. Estrogen | |
| 1617. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Adenohypophysis I. Epinephrine B. Adrenal medulla II. Somatotropin C. Parathyroid gland III. Thymosin D. Thymus gland IV. Calcitonin |
| A. | A-III; B-I; C-IV; D-II |
| B. | A-I; B-II; C-III; D-IV |
| C. | A-II; B-I; C-IV; D-III |
| D. | A-IV; B-III; C-II; D-I |
| Answer» D. A-IV; B-III; C-II; D-I | |
| 1618. |
If both the ovaries of rat are removed then which of the following hormones will be deficient? |
| A. | Prolactin |
| B. | Oestrogen |
| C. | Oxytocin |
| D. | Gonadotrophic hormone |
| Answer» C. Oxytocin | |
| 1619. |
Which of the following statement is correct regarding glucagon hormone? |
| A. | It has opposite effect to that of insulin. |
| B. | It converts glucose to glycogen. |
| C. | It is given to diabetic patients. |
| D. | It is formed by P-cells of pancreas. |
| Answer» B. It converts glucose to glycogen. | |
| 1620. |
Blood calcium levels are maintained because the bones act as a calcium sink in which calcium can either be stored or procured based on the body's needs. If a person secretes too much parathyroid hormone (one possible factor in the bone disease osteoporosis), what happens to calcium levels in the body? |
| A. | Bone stores are depleted and the kidney move calcium. |
| B. | Bone stores are depleted and the kidney' retain calcium. |
| C. | Blood levels of calcium may read high |
| D. | Both [b] and [c] |
| Answer» E. | |
| 1621. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Hypothalamus I. Sperm lysins B. Acrosome II. Estrogen C. Graafian follicle III. Relaxin D. Leydig cells IV. GnRH E. Parturition V. Testosterone |
| A. | A-IV; B-I; C-II; D-III; E-V |
| B. | A-II; B-I; C-IV; D-III; E-V |
| C. | A-II; B-I; C-V; D-IV; E-III |
| D. | A-IV; B-I; C-II; D-V; E-III |
| Answer» E. | |
| 1622. |
Which of the following statements about glucocorticoids is correct? |
| A. | The major glucocorticoid in humans is cortisol. |
| B. | They are secreted by the zona fasciculate of the adrenal cortex. |
| C. | Secretion of these hormones is decreased in Addison's disease. |
| D. | All of the above |
| Answer» E. | |
| 1623. |
A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from blood, the extra: |
| A. | Salts |
| B. | Sugar |
| C. | Insulin |
| D. | Protein |
| Answer» C. Insulin | |
| 1624. |
Which of the following statement is correct for thyrocalcitonin? |
| A. | Produced by parathyroid and decreases \[C{{a}^{++}}\]in ECF. |
| B. | Produced by thyroid and decreases \[C{{a}^{++}}\] in ECF. |
| C. | Produced by parathyroid and increases \[C{{a}^{++}}\]in ECF. |
| D. | Produced by thyroid and increases \[C{{a}^{++}}\]in ECF. |
| Answer» C. Produced by parathyroid and increases \[C{{a}^{++}}\]in ECF. | |
| 1625. |
Injections of a hormone are sometimes given to strengthen contractions of the uterus during childbirth. What hormone might this be? |
| A. | Adrenocorticotropic hormone (ACTH) |
| B. | Thyroxine |
| C. | Oxytocin |
| D. | Insulin |
| Answer» D. Insulin | |
| 1626. |
Ovulation in humans is controlled by: |
| A. | FSH and LTH |
| B. | FSH and GH |
| C. | LTH and LH |
| D. | FSH and LH |
| Answer» E. | |
| 1627. |
Uterine contraction at the child birth is stimulated by: |
| A. | Prolactin |
| B. | Progesterone |
| C. | Adrenaline |
| D. | Oxytocin |
| Answer» E. | |
| 1628. |
Which of the following is related to obesity, low plasma \[N{{a}^{+}}\]high \[{{K}^{+}}\] and increased blood pressure? |
| A. | Growth hormone |
| B. | Cortisol |
| C. | Thyroxine |
| D. | Adrenaline |
| Answer» C. Thyroxine | |
| 1629. |
Which one of the following flows directly into the blood from of its production to act on an organ away from it? |
| A. | Glucagon |
| B. | Renin |
| C. | Cholesterol |
| D. | Cholesterase |
| Answer» C. Cholesterol | |
| 1630. |
Which of the following statements is correct in relation to the endocrine system? |
| A. | Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones. |
| B. | Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messenger are known as hormones. |
| C. | Releasing and inhibitory hormones are produced by the pituitary gland. |
| D. | Adenohypophysis is under direct neural regulation of the hypothalamus. |
| Answer» C. Releasing and inhibitory hormones are produced by the pituitary gland. | |
| 1631. |
Which of the following statements is not correct for the hormones? |
| A. | They act on target organs away from the source glands. |
| B. | They are secreted directly into the blood. |
| C. | They are used again and again like catalysts. |
| D. | They are produced in very minute quantities and are biologically very active. |
| Answer» D. They are produced in very minute quantities and are biologically very active. | |
| 1632. |
Anterior lobe of pituitary secretes: |
| A. | ACTH, TSH and oxytocin |
| B. | STH, GH and ADH |
| C. | TSH, ADH and prolactin |
| D. | FSH, GH and LH |
| Answer» E. | |
| 1633. |
A hormone circulating in the blood with target tissue 1, 2, and 3 could act selectively on only target tissue 1 if: |
| A. | Target tissue 1 had fewer hormone receptors than 2 and 3. |
| B. | Target tissues 2 and 3 had hormone receptors with a higher hormone affinity than 1. |
| C. | Target tissue 1 had hormone receptors with a higher hormone-affinity than 2 and 3. |
| D. | The hormone was released only in the vicinity of target tissue 1. |
| Answer» D. The hormone was released only in the vicinity of target tissue 1. | |
| 1634. |
MSH of pars intermedia of pituitary is responsible for - |
| A. | Darkening of skin in lower verterbrates. |
| B. | Lighten skin colouration in lower vertebrates. |
| C. | Both [a] and [b] |
| D. | Darkening of skin in human beings. |
| Answer» B. Lighten skin colouration in lower vertebrates. | |
| 1635. |
Which one of the following four glands is correctly matched with me accompanying description? |
| A. | Thyroid - Hyperactivity in young children causes cretinism. |
| B. | Thymus - Starts undergoing atrophy after puberty. |
| C. | Parathyroid - Secretes parathormone which promotes movement of sodium ions from blood into bones during calcification. |
| D. | Pancreas - Delta cells of Islets of Langerhans secrete a hormone which stimulates glycolysis in liver. |
| Answer» C. Parathyroid - Secretes parathormone which promotes movement of sodium ions from blood into bones during calcification. | |
| 1636. |
The hormone released by "X" marked in the given figure helps to restore Y. Identify X and Y. |
| A. | XYThyroxineToo much calcium in the blood |
| B. | PTHLowered levels of calcium in blood. |
| C. | ThymosinDecreased level of blood sugar. |
| D. | AdrenalineExcessive loss of sodium in extracellular fluid. |
| Answer» C. ThymosinDecreased level of blood sugar. | |
| 1637. |
"Upregulation" of hormone receptors refers to: |
| A. | Increase in hormone receptor numbers with low hormone levels. |
| B. | Increase in hormone receptor numbers with high neurotransmitter levels. |
| C. | Increase in hormone levels produced by increase in hormone receptor numbers. |
| D. | Decrease in hormone levels produced by decrease in hormone receptor numbers. |
| Answer» B. Increase in hormone receptor numbers with high neurotransmitter levels. | |
| 1638. |
According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will: |
| A. | Not respond to the hormone. |
| B. | Continue to respond to hormone without any difference. |
| C. | Continue to respond to the hormone but in the opposite way. |
| D. | Continue to respond to the hormone but will require higher concentration. |
| Answer» B. Continue to respond to hormone without any difference. | |
| 1639. |
Endocrine glands produce or action of endocrine glands is mediated through: |
| A. | Hormones |
| B. | Enzymes |
| C. | Minerals |
| D. | Vitamins |
| Answer» C. Minerals | |
| 1640. |
Semi autonomous cell organelles of cell are: |
| A. | Nucleus and chloroplast |
| B. | Chloroplast and mitochondria |
| C. | Vacuoles and golgi complex |
| D. | Ribosome and lysosome |
| Answer» C. Vacuoles and golgi complex | |
| 1641. |
Which of the following terms is incorrectly matched with its feature? |
| A. | Osmosis - Movement of water by diffusion. |
| B. | Nucleoplasm - Site of active synthesis of ribosomal RNA. |
| C. | Mesosome - Infolding of cell membrane and characteristics of eukaryotes. |
| D. | Pili - Elongated tubular surface structures (made of special protein) of bacteria. |
| Answer» D. Pili - Elongated tubular surface structures (made of special protein) of bacteria. | |
| 1642. |
Given below are some characters of a cell organelle. Identify the correct organelle which shows all the characters described above. (i) It is a membrane bound space found in the cytoplasm. (ii) It is bound by a single membrane called tonoplast. (iii) It contains water, sap, excretory products and other materials, not useful to the cell. (iv) It has higher concentration of sap than the cytoplasm. |
| A. | Golgi apparatus |
| B. | Lysosomes |
| C. | Endoplasmic reticulum |
| D. | Vacuoles |
| Answer» E. | |
| 1643. |
Which type of set of chromosomes has one genome? |
| A. | Haploid |
| B. | Diploid |
| C. | Triploid |
| D. | Polyploid |
| Answer» B. Diploid | |
| 1644. |
Folding of inner membrane of mitochondria are called. |
| A. | cristae |
| B. | grana |
| C. | calcium oxalate crystals |
| D. | sacs |
| Answer» B. grana | |
| 1645. |
A single unit membrane organelle is: |
| A. | Ribosomes |
| B. | Mitochondria |
| C. | Chloroplast |
| D. | Lysosomes |
| Answer» E. | |
| 1646. |
Which one of the following cell organelles is found only in plants? |
| A. | Golgi complex |
| B. | Mitochondria |
| C. | Plastids |
| D. | Ribosomes |
| Answer» D. Ribosomes | |
| 1647. |
Which of the following statements regarding cilia is incorrect? |
| A. | Cilia contain an outer of nine doublet microtubules surrounding two single microtubules. |
| B. | The organised beating of cilia is controlled by fluxes \[C{{a}^{2+}}\] across the membrane. |
| C. | Cilia are hair-like cellular appendages. |
| D. | Microtubules of cilia are composed of tubulin. |
| Answer» C. Cilia are hair-like cellular appendages. | |
| 1648. |
Read the following statements and identify the correct options given. (i) Sap vacuoles - contain digestive enzymes with the help of which nutrients are digested. (ii) Contractile vacuoles - take part in osmoregulation and excretion (iii) Food vacuoles - store and concentrate mineral salts as well as nutrients (iv) Air vacuoles - store metabolic gases and help in buoyancy of cells. |
| A. | (i) and (ii) |
| B. | (i) and (iii) |
| C. | (ii) and (iv) |
| D. | (i) and (iv) |
| Answer» D. (i) and (iv) | |
| 1649. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I (Chromosome) Column-II (Position of centromere) Metacentric (i) At the tip Submetacentric (ii) Almost near the tip Acrocentric (iii) At the middle Telocentric (iv) Slightly away from the middle |
| A. | A-III; B-IV; C-II; D-I |
| B. | A-IV; B-III; C-II; D-I |
| C. | A-I; B-II; C-III; D-IV |
| D. | A-IV; B-III; C-I; D-II |
| Answer» B. A-IV; B-III; C-II; D-I | |
| 1650. |
Cell wall of bacteria is made up of: |
| A. | Murein |
| B. | Protein |
| C. | Polysaccharide |
| D. | Lipid |
| Answer» B. Protein | |