The given figure shows feedback relationship between three glands and their hormones. The secretion of ?b? is decreased by 'a', secretion of 'c' is increased by 'b' while the secretion of 'a' is decreased by 'c'. Increased or decreased amounts of a hormone cause an increase or decrease in the amount of the following hormone in the system. Now if 'a' is added to the system, the secretion of 'c' is

First decreased and then increased

First increased and then decreased

What is the significance of the discovery of different hormone receptor types for the hormone epinephrine?

It was discovered that slightly different forms of epinephrine (agonists) were secreted by the adrenal glands.

Two types of epinephrine hormone response elements were identified.

Different tissues responded differently to the presence of epinephrine.

It was discovered that slightly different forms of epinephrine (agonists) were secreted by the adrenal glands.

All target tissues for epinephrine possess all four types of epinephrine receptors.

When an egg is fertilised and pregnancy occurs, which of the following is correct regarding hormone concentrations?

Progesterone levels drop, whereas oestrogen levels remain high.

Both progesterone and oestrogen levels drop.

Both progesterone and oestrogen levels rise.

Progesterone levels remain high, whereas oestrogen levels drop.

The given figure is related with principal endocrine glands in human. Identify 1 to 7.

1- Pineal, 2- Pituitary, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Testis,7- Ovary

1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Ovary, 7- Testis

1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5- Kidney, 6- Testis, 7- Ovary

1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Testis, 7- Ovary

Deficiency of vasopressin primarily results in:

Excessive secretion of urochrome

Change in pH from acidic to alkaline range.

During pregnancy corpus luteum:

Persists upto the middle of pregnancy

Direction (For Qs. 38 and 39): The given figure shows two endocrine glands (marked as A and B) and the hormones (marked as 1 and 2) secreted from them. Identify [A] and [B].

A- Hypothalamus, B- Pituitary gland

A- Pituitary gland, B- Adrenal gland

A- Hypothalamus, B- Pituitary gland

A- Hypothalamus, B- Adrenal gland

A- Pituitary gland, B- Hypothalamus

Addison's disease results from:

Hypersecretion of adrenal cortex

Hyposecretion of adrenal cortex

Hypersecretion of adrenal cortex

Hyperactivity of cells of Leydig

Which of the following is an example of negative feedback?

Hair erection due to low body temperature.

Uterine contractions during labour.

Secretion of CRH in response to ACTH.

Hair erection due to low body temperature.

Which of the following events not occurs in Anaphase -I?

Segregation of homologous chromosomes

Poleward movement of chromosomes

Which one of the following list contain the correct order of meiotic events?

Separation of sister chromatids, recombination, formation of the synaptonemal complex, separation of homologous chromosomes.

Separation of homologous chromosomes, formation of the synaptonemal complex, recombination, separation of sister chromatids.

Formation of synaptonemal complex, recombination, separation of sisterchromatids, separation of homologous chromosomes.

Formation of the synaptonemal complex, recombination, separation of homologous chromosomes, separation of sister chromatids.

In some organisms, such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would result from this?

A decrease in chromosome number.

Division of the organism into many cells, most lacking nuclei.

Large cells containing many nuclei.

Crossing over during meiosis occurs at four strand stage. This is proved by the observation that:

usually only two gametes resulting from meiotic division could be recombinants.

rarely all four gametes resulting from a meiotic division could be recombinants.

usually only two gametes resulting from meiotic division could be recombinants.

chaismata are seen only at the four strand stage.

occasionally none of the four gametes resulting from meiosis could be a recombinant.

Which is not true about sphaerosomes [Orissa JEE 2004]

Single membrane bound structure

Vacuoles of plants can be involved in which of the following activity [AMU 2005]

The accumulation of nutrient material

The fluid part of cell called cell sap is the [AIIMS 1993; Manipal 2005]

Living contents of the vacuole of cell

Non-living contents of the vacuole of cell

Living contents of the vacuole of cell

You have found a mass of cells in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Upon microscopic examination of the cells you find no evidence of membrane-bound organelles. How would you classify this cell?

As a member of domain Archaebacteria

14620 + Mcqs in Biology in NEET Page 287 McqOptions

14301.	The given figure shows feedback relationship between three glands and their hormones. The secretion of ?b? is decreased by 'a', secretion of 'c' is increased by 'b' while the secretion of 'a' is decreased by 'c'. Increased or decreased amounts of a hormone cause an increase or decrease in the amount of the following hormone in the system. Now if 'a' is added to the system, the secretion of 'c' is
A.	Decreased
B.	Increased
C.	First decreased and then increased
D.	First increased and then decreased
Answer» B. Increased

Discussion

14302.	Which of the following hormone stimulates pancreas to secrete enzymes?
A.	Enterocrinin
B.	CCK-PZ
C.	Gastrin
D.	Secretin
Answer» C. Gastrin

Discussion

14303.	Restlessness, intolerance to temperature and increased metabolism is due to:
A.	Thyrotoxicosis
B.	ACTH deficiency
C.	Pituitary deficiency
D.	Calcitonin deficiency
Answer» B. ACTH deficiency

Discussion

14304.	Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Gastrin I. Acts on gastric gland and stimulates secretion of HCl B. Secretin II. Acts on the exocrine part of pancreas and stimulates secretion of water and \[HC{{O}_{3}}^{-}\]ions. C. CCK III. Acts on both pancreas and stimulates the pancreatic enzymes and bile juice respectively. D. GIP IV. Inhibits gastric secretion and motility.
A.	A-IV; B-III; C-II; D-I
B.	A-II; B-IV; C-III; D-I
C.	A-I; B-II; C-III; D-IV
D.	A-I; B-III; C-II; D-IV
Answer» D. A-I; B-III; C-II; D-IV

Discussion

14305.	Which of the following disease is caused due to over secretion of the structure marked as X?
A.	Gigantism
B.	Diabetes mellitus
C.	Diabetes insipidus
D.	Grave's disease
Answer» E.

Discussion

14306.	What is the significance of the discovery of different hormone receptor types for the hormone epinephrine?
A.	Two types of epinephrine hormone response elements were identified.
B.	Different tissues responded differently to the presence of epinephrine.
C.	It was discovered that slightly different forms of epinephrine (agonists) were secreted by the adrenal glands.
D.	All target tissues for epinephrine possess all four types of epinephrine receptors.
Answer» C. It was discovered that slightly different forms of epinephrine (agonists) were secreted by the adrenal glands.

Discussion

14307.	If a person has protruding eyes, tachycardia an higher body temperature, he is suffering from:
A.	Cretinism
B.	Hyperthyroidism
C.	Myxoedema
D.	Acromegaly
Answer» C. Myxoedema

Discussion

14308.	When an egg is fertilised and pregnancy occurs, which of the following is correct regarding hormone concentrations?
A.	Progesterone levels drop, whereas oestrogen levels remain high.
B.	Both progesterone and oestrogen levels drop.
C.	Both progesterone and oestrogen levels rise.
D.	Progesterone levels remain high, whereas oestrogen levels drop.
Answer» E.

Discussion

14309.	Which endocrine gland stores its secretion in extracellular spaces before discharging it info blood?
A.	Testis
B.	Pancreas
C.	Thyroid
D.	Adrenal
Answer» D. Adrenal

Discussion

14310.	The first hormone artificially produced by genetically engineered bacteria is:
A.	Insulin
B.	Somatotropin
C.	Testosterone
D.	Adrenaline
Answer» B. Somatotropin

Discussion

14311.	The given figure is related with principal endocrine glands in human. Identify 1 to 7.
A.	1- Pineal, 2- Pituitary, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Testis,7- Ovary
B.	1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Ovary, 7- Testis
C.	1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5- Kidney, 6- Testis, 7- Ovary
D.	1- Pituitary, 2- Pineal, 3- Thyroid and parathyroid, 4- Thymus, 5-Adrenal, 6- Testis, 7- Ovary
Answer» E.

Discussion

14312.	'Brain sand' is associated to:
A.	Pineal body
B.	Thymus gland
C.	Thyroid gland
D.	Pituitary gland
Answer» B. Thymus gland

Discussion

14313.	Deficiency of vasopressin primarily results in:
A.	Increased volume of urine
B.	Decreased volume of urine
C.	Excessive secretion of urochrome
D.	Change in pH from acidic to alkaline range.
Answer» B. Decreased volume of urine

Discussion

14314.	Which of the following does not secrete any hormone?
A.	Spleen
B.	Ovary
C.	Testes
D.	Pancreas
Answer» B. Ovary

Discussion

14315.	During pregnancy corpus luteum:
A.	Degenerates
B.	Changes to corpus albicans
C.	Persists until parturition
D.	Persists upto the middle of pregnancy
Answer» E.

Discussion

14316.	Direction (For Qs. 38 and 39): The given figure shows two endocrine glands (marked as A and B) and the hormones (marked as 1 and 2) secreted from them. Identify [A] and [B].
A.	A- Pituitary gland, B- Adrenal gland
B.	A- Hypothalamus, B- Pituitary gland
C.	A- Hypothalamus, B- Adrenal gland
D.	A- Pituitary gland, B- Hypothalamus
Answer» B. A- Hypothalamus, B- Pituitary gland

Discussion

14317.	Direction (For Qs. 38 and 39): The given figure shows two endocrine glands (marked as A and B) and the hormones (marked as 1 and 2) secreted from them. Identify the hormone represented by lines 1 and 2.
A.	1-ACTH, 2-Aldosterone
B.	1-ACTH, 2-Adrenaline
C.	1-TSH, 2-Thyroxine
D.	1-TSH, 2-Aldosterone
Answer» B. 1-ACTH, 2-Adrenaline

Discussion

14318.	Jet lag occurs when a person moves rapidly from one time zone to another, causing conflict between the body's biological rhythm and the new cycle of light and dark. Some scientists suspect that jet lag may result from disruption of a daily hormone cycle. Which of the following hormones do you think is the most likely suspect?
A.	Epinephrine
B.	Insulin
C.	Melatonin
D.	Estrogen
Answer» D. Estrogen

Discussion

14319.	Which of the following radioactive isotope is used in the detection of thyroid cancer?
A.	Iodine-131
B.	Carbon-14
C.	Uranium-238
D.	Phosphorus-32
Answer» B. Carbon-14

Discussion

14320.	Which of the following hormones have antagonistic (opposing) effects?
A.	Thyroxine and calcitonin
B.	Insulin and glucagon
C.	Growth hormone and epinephrine
D.	ACTH and glucocorticoids
Answer» C. Growth hormone and epinephrine

Discussion

14321.	Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Hypothalamus I. Relaxin B. Anterior pituitary II. Estrogen C. Testis III. FSH and LH D. Ovary IV. Androgens E. V. Gonadotropin releasing Hormone
A.	A-V; B-III; C-IV; D-II
B.	A-V; B-III; C-II; D-IV
C.	A-I; B-II; C-IV; D-III
D.	A-III; B-V; C-IV; D-II
Answer» B. A-V; B-III; C-II; D-IV

Discussion

14322.	Addison's disease results from:
A.	Hyposecretion of adrenal cortex
B.	Hypersecretion of adrenal cortex
C.	Hypertrophy of gonads
D.	Hyperactivity of cells of Leydig
Answer» B. Hypersecretion of adrenal cortex

Discussion

14323.	The urine of a man is very dilute and the quantity of urine is too much and dehydration has started in his body and he is very thirsty by the cause of:
A.	Hypersecretion of ADH
B.	Hyposecretion of ADH
C.	Both [a] and [b]
D.	None of the above
Answer» C. Both [a] and [b]

Discussion

14324.	Hormone connected with increased rate of glycogenolysis, blood pressure and heart beat is:
A.	Insulin
B.	Glucagon
C.	Adrenaline
D.	FSH
Answer» D. FSH

Discussion

14325.	Secretin and cholecystokinin are digestive hormones. They are secreted in:
A.	Pyloric stomach
B.	Duodenum
C.	Ileum
D.	Oesophagus
Answer» C. Ileum

Discussion

14326.	Thymosin stimulate secretion of:
A.	Milk
B.	Erythrocytes
C.	T-lymphocytes
D.	Melanocytes
Answer» D. Melanocytes

Discussion

14327.	What is the effect on metamorphosis of tadpole of frog when there is less amount of iodine in water?
A.	Accelerated
B.	Delayed
C.	Stopped
D.	not affected
Answer» D. not affected

Discussion

14328.	Which of the following is an example of negative feedback?
A.	Sucking reflex
B.	Uterine contractions during labour.
C.	Secretion of CRH in response to ACTH.
D.	Hair erection due to low body temperature.
Answer» D. Hair erection due to low body temperature.

Discussion

14329.	The effect of prolactin hormone is on:
A.	Liver
B.	Pancreas
C.	Mammary glands
D.	Bones
Answer» D. Bones

Discussion

14330.	Which of the following events not occurs in Anaphase -I?
A.	Segregation of homologous chromosomes
B.	Contraction in spindle
C.	Poleward movement of chromosomes
D.	Division of centromere
Answer» E.

Discussion

14331.	At which stage of cell cycle division the homologous chromosome separate, while sister chromatid remain associated at their centromere:
A.	Metaphase-I of meiosis
B.	Anaphase-I of meiosis
C.	Metaphase of mitosis
D.	Anaphase of mitosis
Answer» C. Metaphase of mitosis

Discussion

14332.	Which one of the following list contain the correct order of meiotic events?
A.	Separation of sister chromatids, recombination, formation of the synaptonemal complex, separation of homologous chromosomes.
B.	Separation of homologous chromosomes, formation of the synaptonemal complex, recombination, separation of sister chromatids.
C.	Formation of synaptonemal complex, recombination, separation of sisterchromatids, separation of homologous chromosomes.
D.	Formation of the synaptonemal complex, recombination, separation of homologous chromosomes, separation of sister chromatids.
Answer» E.

Discussion

14333.	The cellular structure which disappear during mitosis is:
A.	Plasma membrane
B.	Nuclear membrane
C.	Mitochondria
D.	Nuclear membrane and nucleolus
Answer» E.

Discussion

14334.	Strasburger is famous for:
A.	discovery of cell division
B.	proposing the term nucleoplasm
C.	proposing the term cytoplasm
D.	All of the above
Answer» E.

Discussion

14335.	Recombinant nodules are found during:
A.	Anaphase
B.	Prophase
C.	Telophase
D.	Metaphase
Answer» C. Telophase

Discussion

14336.	Given below is a schematic break-up of the phases / stages of cell cycle with few parts labelled as 1, 2, 3 & 4. Which one of the following is the correct indication of the stage/phase in the cell cycle?
A.	3 - Karyokinesis
B.	4 - Synthetic phase
C.	1 - Cytokinesis
D.	2 - Metaphase
Answer» C. 1 - Cytokinesis

Discussion

14337.	In some organisms, such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would result from this?
A.	A decrease in chromosome number.
B.	Inability to duplicate DNA.
C.	Division of the organism into many cells, most lacking nuclei.
D.	Large cells containing many nuclei.
Answer» E.

Discussion

14338.	Crossing over during meiosis occurs at four strand stage. This is proved by the observation that:
A.	rarely all four gametes resulting from a meiotic division could be recombinants.
B.	usually only two gametes resulting from meiotic division could be recombinants.
C.	chaismata are seen only at the four strand stage.
D.	occasionally none of the four gametes resulting from meiosis could be a recombinant.
Answer» B. usually only two gametes resulting from meiotic division could be recombinants.

Discussion

14339.	Exchange of chromosome segments between maternal and paternal chromatids during meiosis is called [DPMT 1990; CBSE PMT 2000]
A.	Linkage
B.	Dominance
C.	Crossing over
D.	DNA multiplication
Answer» D. DNA multiplication

Discussion

14340.	Which is not true about sphaerosomes [Orissa JEE 2004]
A.	Arise from ER.
B.	Related to fat
C.	Single membrane bound structure
D.	Involved in photorespiration
Answer» E.

Discussion

14341.	Vacuoles of plants can be involved in which of the following activity [AMU 2005]
A.	The accumulation of nutrient material
B.	Controls turgor pressure
C.	Regulation of cellular pH
D.	All of the above
Answer» E.

Discussion

14342.	The fluid part of cell called cell sap is the [AIIMS 1993; Manipal 2005]
A.	Non-living contents of a cell
B.	Living contents of a cell
C.	Non-living contents of the vacuole of cell
D.	Living contents of the vacuole of cell
Answer» D. Living contents of the vacuole of cell

Discussion

14343.	Peroxisomes in plant cells are called
A.	Oxysomes
B.	Glyoxysomes
C.	Condriosomes
D.	Autosomes
Answer» C. Condriosomes

Discussion

14344.	The strength and rigidity of a cell wall is due to the substance known as.
A.	suberin
B.	cellulose
C.	lignin
D.	pectin
Answer» D. pectin

Discussion

14345.	Study the following statements on cilium or flagellum and choose the correct option. (i) Cilium / flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules. (ii) Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid. (iii) Flagella are comparatively longer and responsible for cell movement. (iv) Cilium and flagellum are covered with plasma membrane.
A.	(i) and (ii)
B.	(i), (ii), (iii) and (iv)
C.	(i) and (iv)
D.	(ii) and (iii)
Answer» C. (i) and (iv)

Discussion

14346.	\[{{F}_{1}}\] particles / oxysome/ elementary particles are present in:
A.	Endoplasmic reticulum
B.	Chloroplast
C.	Mitochondria
D.	Golgi complex
Answer» D. Golgi complex

Discussion

14347.	You have found a mass of cells in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Upon microscopic examination of the cells you find no evidence of membrane-bound organelles. How would you classify this cell?
A.	As a eukaryotic cell
B.	As a prokaryotic cell
C.	As a member of domain Archaebacteria
D.	Both and
Answer» E.

Discussion

14348.	Identify the correct statements in comparison to the cell doctrine and choose the option. (i) Cells are the basic units of structure in the body of living organisms. (ii) The bodies of all living beings are made up of cells and their products. (iii) Genetic information is stored and expressed inside the cells. (iv) Cells are the basic units of function in living organism that is, the activities of an organism are the sum total of the activities of its cells.
A.	(ii) and (iii)
B.	(i) and (ii)
C.	Only (i)
D.	All of the above
Answer» E.

Discussion

14349.	In a prokaryotic cell, the correct option is: (i) enveloped genetic material is present (ii) ribosomes are absent (iii) an organised nucleus is absent.
A.	Only (i)
B.	Only (ii)
C.	Only (iii)
D.	All of the above
Answer» E.

Discussion

14350.	Choose the correct statement from the options given below. (i) Separation from extracellular medium allows the cells to maintain its chemical pool, orderliness of structure and reactions in contrast to disorderly distribution and randomly interacting molecules in the extra- cellular medium. (ii) Cells are unable to recognise one another due to the presence of specific chemicals on their surface. (iii) Cells of plant tissue are often connected with one another through cytoplasmic bridges called Plasmodesmata. (iv) Different cells of an organism communicate as well as exchange materials with one another.
A.	(ii) and (iii)
B.	(iii) and (iv)
C.	(i),(iii) and (iv)
D.	(i), (ii), (iii) and (iv)
Answer» D. (i), (ii), (iii) and (iv)

Discussion

Explore topic-wise MCQs in NEET.

Which of the following hormone stimulates pancreas to secrete enzymes?

Restlessness, intolerance to temperature and increased metabolism is due to:

Which of the following disease is caused due to over secretion of the structure marked as X?

What is the significance of the discovery of different hormone receptor types for the hormone epinephrine?

If a person has protruding eyes, tachycardia an higher body temperature, he is suffering from:

When an egg is fertilised and pregnancy occurs, which of the following is correct regarding hormone concentrations?

Which endocrine gland stores its secretion in extracellular spaces before discharging it info blood?

The first hormone artificially produced by genetically engineered bacteria is:

The given figure is related with principal endocrine glands in human. Identify 1 to 7.

'Brain sand' is associated to:

Deficiency of vasopressin primarily results in:

Which of the following does not secrete any hormone?

During pregnancy corpus luteum:

Direction (For Qs. 38 and 39): The given figure shows two endocrine glands (marked as A and B) and the hormones (marked as 1 and 2) secreted from them. Identify [A] and [B].

Direction (For Qs. 38 and 39): The given figure shows two endocrine glands (marked as A and B) and the hormones (marked as 1 and 2) secreted from them. Identify the hormone represented by lines 1 and 2.

Which of the following radioactive isotope is used in the detection of thyroid cancer?

Which of the following hormones have antagonistic (opposing) effects?

Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Hypothalamus I. Relaxin B. Anterior pituitary II. Estrogen C. Testis III. FSH and LH D. Ovary IV. Androgens E. V. Gonadotropin releasing Hormone

Addison's disease results from:

The urine of a man is very dilute and the quantity of urine is too much and dehydration has started in his body and he is very thirsty by the cause of:

Hormone connected with increased rate of glycogenolysis, blood pressure and heart beat is:

Secretin and cholecystokinin are digestive hormones. They are secreted in:

Thymosin stimulate secretion of:

What is the effect on metamorphosis of tadpole of frog when there is less amount of iodine in water?

Which of the following is an example of negative feedback?

The effect of prolactin hormone is on:

Which of the following events not occurs in Anaphase -I?

At which stage of cell cycle division the homologous chromosome separate, while sister chromatid remain associated at their centromere:

Which one of the following list contain the correct order of meiotic events?

The cellular structure which disappear during mitosis is:

Strasburger is famous for:

Recombinant nodules are found during:

Given below is a schematic break-up of the phases / stages of cell cycle with few parts labelled as 1, 2, 3 & 4. Which one of the following is the correct indication of the stage/phase in the cell cycle?

In some organisms, such as certain fungi and algae, cells undergo mitosis repeatedly without subsequently undergoing cytokinesis. What would result from this?

Crossing over during meiosis occurs at four strand stage. This is proved by the observation that:

Exchange of chromosome segments between maternal and paternal chromatids during meiosis is called [DPMT 1990; CBSE PMT 2000]

Which is not true about sphaerosomes [Orissa JEE 2004]

Vacuoles of plants can be involved in which of the following activity [AMU 2005]

The fluid part of cell called cell sap is the [AIIMS 1993; Manipal 2005]

Peroxisomes in plant cells are called

The strength and rigidity of a cell wall is due to the substance known as.

\[{{F}_{1}}\] particles / oxysome/ elementary particles are present in:

You have found a mass of cells in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Upon microscopic examination of the cells you find no evidence of membrane-bound organelles. How would you classify this cell?

In a prokaryotic cell, the correct option is: (i) enveloped genetic material is present (ii) ribosomes are absent (iii) an organised nucleus is absent.