Explore topic-wise MCQs in Biology.

This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

3701.

Which of the following causes formation of osteoblast?

A. Thyroxine
B. PTH
C. Thyrocalcitonin
D. T3
Answer» D. T3
Discussion
3702.

By which structure, hypothalamus is connected with anteriore lobe of pituitary gland?

A. Dendrites of neurohypophysi
B. Axons of neurohypophysis
C. Bands of white fibres from cerebellar region
D. Hypophysial portal system
Answer» E.
Discussion
3703.

Which of the following option is correct for the location of pineal gland?

A. Under corpus callosum and between cerebral hemisphere
B. Above corpus callosum and between cerebral hemisphere
C. Under corpus collosum and between cerebellar hemisphere
D. Lateral to cerebellar hemisphere
Answer» B. Above corpus callosum and between cerebral hemisphere
Discussion
3704.

Which of the following are effects of Vasopressin?

A. Incresed glucose level
B. High BMR
C. Accumulation of fat under skin
D. Reabsorption of water and electrolytes
Answer» E.
Discussion
3705.

Which of the folllowing disorder occurs due to deficiency of ADH?

A. Diabetes incipidu
B. Diabetes mellitus
C. Highly concentrated urine formation
D. Rapid reabsorbtion of nutrient
Answer» B. Diabetes mellitus
Discussion
3706.

Which of the following is correct for somatotropic hormone?

A. Less secretions of it causes Giantism
B. More secretion of it causes Dwarfism
C. Optimal secretion of it can retards protein synthesis
D. In adult, its more secretion causes enlargement of lower jaw
Answer» E.
Discussion
3707.

Which cells are present on the wall of thryoid follicle?

A. Squamou
B. Cuboidal
C. Columnar
D. Ciliated squamous
Answer» C. Columnar
Discussion
3708.

Pituitary gland is located in a, which is b of c bone?

A. a = Sella turcica b = Raised surface c = Ethmoid
B. a = Reketh’s pauch b = Depression c = Nasal
C. a = Sella turcica b = Depression c= Sphenoid
D. a = Reketh’s pauch b = Depression
Answer» D. a = Reketh’s pauch b = Depression
Discussion
3709.

Which of the following option indicates correctly matched pairs for the column I and column II

A. (p - i) (q- ii) (r - iii) (s - iv)
B. (p - iii) (q- iv) (r - ii) (s - i)
C. (p - ii) (q- iii) (r - iv) (s - i)
D. (p - iii) (q- iv) (r - i) (s - ii)
Answer» C. (p - ii) (q- iii) (r - iv) (s - i)
Discussion
3710.

Given diagram indicate which organelle?]

A. Mitochondria
B. Chloroplast
C. Golgi apparatus
D. Endoplasmic reticulum
Answer» D. Endoplasmic reticulum
Discussion
3711.

What is cause of exophthalmic goiter?

A. Less secretion of thyroid
B. Under secretion of parathyroid
C. Oversecretion of parathroid
D. Oversecretion of thyroid
Answer» E.
Discussion
3712.

What is related to region lablelled as "a" in the diagram?

A. TCT
B. TSH
C. PTH
D. LH
Answer» D. LH
Discussion
3713.

What does “a” indicate in the given diagram?

A. Arterial circulaton
B. Portal circulation
C. Hypothalamus glomerulus
D. None of the given
Answer» D. None of the given
Discussion
3714.

It causes glycogenesis?

A. Glucogen
B. Insulin
C. Melatonin
D. Somatostatin
Answer» C. Melatonin
Discussion
3715.

Which of the following hormones are concerned with osmoregulation?

A. ADH and thyroxine
B. Aldosterone and Oxytocin
C. Oxytocin and Glucocorticoids
D. All cortisols
Answer» B. Aldosterone and Oxytocin
Discussion
3716.

Which of the following stimulates adrenal gland in an emergency?

A. Adrenal medulla
B. CNS
C. PNS
D. Mid-brain
Answer» C. PNS
Discussion
3717.

Which of the following option indicates correctly matched group?

A. CCK- Wall of duodenum-Relaxation of gall bladder
B. JGA- Erythropoietin-Formation of R.B.C.
C. JGA- Etrythropoietin-Degradation of R.B.C.
D. GIP- Gastro- Intestinal- Stimulates gastric secretion
Answer» C. JGA- Etrythropoietin-Degradation of R.B.C.
Discussion
3718.

It is correct for the function of pineal gland?

A. To maintain ovarian follicle
B. Self defense capability
C. To maintain mineral ions in body
D. Loss of water from body
Answer» C. To maintain mineral ions in body
Discussion
3719.

Which of the following is not primary endocrine gland?

A. Adrenal medulla
B. Parathyroid gland
C. Thymus
D. Corpus luteum
Answer» E.
Discussion
3720.

Find the odd (In terms of source )

A. ANF
B. Vasopressin
C. Adrenaline
D. Aldosterone
Answer» B. Vasopressin
Discussion
3721.

Which hormone regulates production of sperms?

A. LH
B. LTH
C. FSH
D. All of the given
Answer» D. All of the given
Discussion
3722.

Which hormone increases blood calcium level?

A. Thyroxine
B. Thyrocalcitonin
C. PTH
D. All of the above
Answer» D. All of the above
Discussion
3723.

Which of the following secretes mineralocorticoids?

A. Zona glomerulosa
B. Zona Reticularis
C. Zona Fasciculata
D. Adrenal medulla
Answer» B. Zona Reticularis
Discussion
3724.

Secretion of which of the following is necessary for increase in uptake of glucose by liver and adipose cells ?

A. Alpha cell of islet of Langerhans
B. Beta cell of islet of Langerhans
C. delta cells
D. B cells of pancreatic acini
Answer» C. delta cells
Discussion
3725.

Who secrete ANF?

A. Juxta glomerular appratu
B. Atrial wall of heart
C. Outer wall of stomac
D. Ventricular wall of heart
Answer» C. Outer wall of stomac
Discussion
3726.

Which of the following is not effect of cathecholamine?

A. Sweating
B. Warm red face
C. Increase in blood sugar level
D. Decreased hear beat
Answer» E.
Discussion
3727.

Under secretion of which hormone can cause diabetes mellitus?

A. Vasopressin
B. ADH
C. Aldesterone
D. Insulin
Answer» E.
Discussion
3728.

Which hormone regulates colour of skin?

A. MSH
B. LH
C. PTH
D. LTH
Answer» B. LH
Discussion
3729.

Which hormone stimulates formation of alveoli in mammary gland?

A. Oestrogen
B. Progesterone
C. Relaxin
D. Oxytocin
Answer» C. Relaxin
Discussion
3730.

Which disease occurs due to less secretion of mineralocorticoids?

A. Addison’s disease
B. Cretinism
C. Myxodema
D. Cushing diseases
Answer» B. Cretinism
Discussion
3731.

Which hormone is secreted by Zona fasciculata?

A. ADH
B. Mineralocorticoids
C. Glucocorticoids
D. Hydrocorticoids
Answer» D. Hydrocorticoids
Discussion
3732.

Which hormone’s secretion increases in emergency?

A. Thyroxine
B. Parathormone
C. Adrenaline
D. Aldosterone
Answer» D. Aldosterone
Discussion
3733.

Which gland atrophies after puberty?

A. Thymu
B. Thyroid
C. Parathyroid
D. adrenal
Answer» B. Thyroid
Discussion
3734.

Which option shows correct path of Libido expression?

A. Leydig’s cells Androgensympathetic nervous systemLibido
B. AndrogenLeydig’s cellPNSLibido
C. Leydig’s cell AndrogenCNSLibido
D. Epithelial cells and semini Ferous tubuleAndrogenCNS Libido
Answer» D. Epithelial cells and semini Ferous tubuleAndrogenCNS Libido
Discussion
3735.

Which of the following is not useful in blood clotting. (AFMC-96)

A. Fibrin
B. Calcium
C. Platelets
D. Bilirubin
Answer» E.
Discussion
3736.

It is required for differentiation of T-cells?

A. T3
B. Thymosin
C. T4
D. Melatonin
Answer» C. T4
Discussion
3737.

Which of the following hormone is not secreted under influnce of pituitary gland?

A. Thyroxine
B. Aldosterone
C. Oestrogen
D. Glucocorticoids
Answer» C. Oestrogen
Discussion
3738.

Mention the name of P in the given figure :

A. Deoxygenated blood enters into lungs
B. Oxygenated blood flows outside the lungs
C. Oxygenated blood flows toward the body
D. Deoxygenated blood flows from the body
Answer» D. Deoxygenated blood flows from the body
Discussion
3739.

Which type of blood flows in P and Q indicating parts ?

A. Oxygenated in both
B. Deoxygenated in both
C. Oxygenated, Deoxygenated
D. Deoxygenated, Oxygenated
Answer» B. Deoxygenated in both
Discussion
3740.

What is the life span of RBC in humans ? (AFMC - 90)

A. 120 days
B. 210 days
C. 220 days
D. 200 days
Answer» B. 210 days
Discussion
3741.

The wall of which part of the heart is very thich ? (AiiMS-99)

A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
Answer» C. Right atrium
Discussion
3742.

Mention the name of P in the given figure.

A. Deoxygenated blood flows from the body
B. Oxygenated blood flows from the lungs
C. Oxygenated blood flows toward the body
D. Deoxygenated blood enters into lungs
Answer» D. Deoxygenated blood enters into lungs
Discussion
3743.

What is responsible for systole ? (BHU-86,2000,DPMT-86,MANIPAL-95)

A. Entry of blood in lungs
B. Entry of blood in heart
C. Blood flow out of heart
D. Blood flow out of vein
Answer» B. Entry of blood in heart
Discussion
3744.

Which of the following statement is correct ? (BHU-93)

A. All veins carry deoxygenated blood
B. All arteries carry deoxygenated blood
C. All veins carry deoxygenated blood except one
D. All arteries carry deoxygenated blood except one
Answer» E.
Discussion
3745.

In which of the following close circulation is found ? (CBSC-94)

A. Cockroach
B. Mosquito
C. Housefly
D. Tadpole
Answer» E.
Discussion
3746.

Which type of WBCs are found in maximum number ?

A. Monocytes
B. Basophils
C. Acidophils
D. Neutrophils
Answer» E.
Discussion
3747.

What is found in the surrounding of wall of heart ? (AFMC - 93)

A. Pericardial cavity
B. Perineural cavity
C. Pericardium
D. None of the above
Answer» D. None of the above
Discussion
3748.

What P and Q indicate in the given figure ?

A. Thromboplast, Proaccelerin
B. Prothrombin, Fibrinogen
C. Globulin, FSF
D. Plasma thromboplastin, Fibrin stabilizing
Answer» C. Globulin, FSF
Discussion
3749.

By which cause Dubb sound arises ? (CBSC-94)

A. Closing of semilunar valve
B. Closing of bicuspid valve
C. Closing of tricuspid valve
D. Both b and c
Answer» B. Closing of bicuspid valve
Discussion
3750.

How lymph differs from blood ? (CPMT - 73,84)

A. More RBC and less WBC
B. Less RBC and more WBC
C. RBC absent and less RBC
D. RBC absent and more WBC
Answer» D. RBC absent and more WBC
Discussion