Which hormone is secreted during milking in cows and buffaloes?
(A) Somatotropin
(B) Oxytocin
(C) Interferon
(D) Insulin
Answer: (B) Oxytocin
Which gland is known as the “master gland” of the human body?
(A) Pancreas
(B) Pituitary
(C) Adrenal
(D) Thyroid
Answer: (B) Pituitary
Which is the smallest endocrine gland in the human body?
(A) Adrenal
(B) Thyroid
(C) Pituitary
(D) Pancreas
Answer: (C) Pituitary
Which gland is responsible for secreting sex hormones?
(A) Adrenal gland
(B) Thyroid gland
(C) Pituitary gland
(D) Sebaceous gland
Answer: (A) Adrenal gland
Which gland is the smallest in the body overall?
(A) Liver
(B) Thyroid
(C) Pituitary
(D) Salivary gland
Answer: (C) Pituitary
The pituitary gland is located at the:
(A) Base of the heart
(B) Base of the brain
(C) Neck
(D) Abdomen
Answer: (B) Base of the brain
Deficiency of which element causes malfunctioning of the thyroid gland?
(A) Iodine
(B) Iron
(C) Calcium
(D) Vitamin C
Answer: (A) Iodine
Which of the following is not considered a gland?
(A) Thyroid
(B) Stomach
(C) Liver
(D) Pancreas
Answer: (B) Stomach
The largest mixed gland in the human body is:
(A) Thymus
(B) Liver
(C) Pancreas
(D) Spleen
Answer: (C) Pancreas
Which pigment gives color to human skin?
(A) Melanin
(B) Rhodopsin
(C) Iodopsin
(D) Anthocyanin
Answer: (A) Melanin
The pigment responsible for vision in dim light is:
(A) Carotene
(B) Rhodopsin
(C) Iodopsin
(D) Retinene
Answer: (B) Rhodopsin
The eye’s color is determined by pigment in the:
(A) Cornea
(B) Iris
(C) Rods
(D) Cones
Answer: (B) Iris
Enzymes are made up of:
(A) Microorganisms
(B) Proteins
(C) Inorganic compounds
(D) Moulds
Answer: (B) Proteins
Which enzyme was the first to be isolated in pure crystalline form?
(A) Amylase
(B) Catalase
(C) Lipase
(D) Urease
Answer: (D) Urease
Trypsin enzyme is responsible for breaking down:
(A) Carbohydrates
(B) Synthesizing proteins
(C) Fats
(D) Proteins
Answer: (D) Proteins
Metabolism refers to:
(A) Synthesis of biomolecules
(B) Breakdown of biomolecules
(C) Both synthesis and breakdown of biomolecules
(D) Recycling of biomolecules
Answer: (C) Both synthesis and breakdown of biomolecules
Which organ excretes water, fat, and other metabolic wastes?
(A) Kidney
(B) Skin
(C) Spleen
(D) Salivary glands
Answer: (A) Kidney
The functional unit of the kidney is called:
(A) Axon
(B) Neuron
(C) Nephron
(D) Artery
Answer: (C) Nephron
“Pigeon milk” is secreted by which organ in birds?
(A) Crop
(B) Birds
(C) Mammals
(D) All of the above
Answer: (A) Crop
Sweat glands in mammals primarily function in:
(A) Removing excess salts
(B) Excreting nitrogenous wastes
(C) Thermoregulation
(D) Sexual attraction
Answer: (C) Thermoregulation
What stimulates the immune system to produce antibodies?
(A) Carcinogen
(B) Androgen
(C) Antigen
(D) Oestrogen
Answer: (C) Antigen
Which part of the body contains the sigmoid colon?
(A) Anal canal
(B) Large intestine
(C) Ileum
(D) Small intestine
Answer: (B) Large intestine
Which is the largest internal organ of the human body?
(A) Heart
(B) Brain
(C) Liver
(D) Kidney
Answer: (C) Liver
How many mature eggs are typically released in a single menstrual cycle?
(A) 3
(B) 2
(C) 1
(D) 4
Answer: (C) 1
ACTH hormone is secreted by:
(A) Adrenal cortex
(B) Adrenal medulla
(C) Pituitary gland
(D) Pineal gland
Answer: (C) Pituitary gland
Which of the following animals is hermaphroditic and shows cross-fertilization?
(A) Hydra
(B) Ascaris
(C) Earthworm
(D) Silkworm
Answer: (C) Earthworm