All Free Biology MCQs with Answers

• A. Foramen Triosseum
• B. Foramen Magnum
• C. Acetabulum
• D. Ischia Pubic Foramen

Explanation: The foramen magnum is a large opening in the occipital bone of the human skull.

• A. Pelvic girdle
• B. Skull
• C. Sternum
• D. Vertebral column
• E. Ribs

Explanation: Explanation for this question will be added soon.

• A. Chondroitin
• B. Ossein
• C. Casein
• D. Cartilagin
• E. None

Explanation: Proteoglycans consist of polysaccharides attached with protein chondroitin.

• A. Elastic cartilage
• B. Fibrous cartilage
• C. Perichondrium
• D. Hyaline cartilage

Explanation: Hyaline cartilage is the most abundant type of cartilage and is found in the nose, ears, trachea, larynx, and smaller respiratory tubes.

• A. Fibrous
• B. Hyaline
• C. Elastic
• D. Flexible

Explanation: Hyaline cartilage is a glossy, greyish-white tissue with a uniform appearance.

• A. Lacks vascular supply
• B. Lacks mineral deposits in matrix
• C. Has less number of cells deep down
• D. Lacks protein in matrix

Explanation: Cartilage is more difficult to heal than bone primarily because it lacks a vascular supply, meaning it has very limited blood flow.

• A. Skin
• B. Liver
• C. Large intestine
• D. Both A and B

Explanation: Skin covers our entire body and has the largest surface area out of all the organs.

• A. Hyaline cartilage
• B. Elastic cartilage
• C. Fibrocartilage
• D. None of these

Explanation: Hyaline cartilage is the most common type of cartilage in your body. It lines your joints and caps the ends of your bones.

• A. Alkaline phosphatase
• B. LDH-1
• C. Acidic phosphatase
• D. None of these options are correct

Explanation: The enzyme that is raised in rickets is alkaline phosphatase. Alkaline phosphatase is an enzyme that is involved in the mineralization of…

• A. Ankles
• B. Skull
• C. Vertebrae
• D. Elbow
• E. Shoulder

Explanation: Explanation for this question will be added soon.

• A. Shoulder
• B. Wrist
• C. Elbow
• D. Knee

Explanation: The "ball" is the top, rounded part of the humerus, and the "socket" is the bowl-shaped part of the scapula,into which the ball fits.

• A. Intervertebral disc
• B. Skul bones
• C. Costal cartilage
• D. Pubic symphysis

Explanation: The bones of the skull are an example. The immovable joints between the plates of the skull are known as sutures.

• A. Fibrous joints
• B. Synovial joints
• C. Cartilaginous joints
• D. Gliding joints

Explanation: Both pubic symphysis and intervertebral discs are types of cartilaginous joints.

• A. Thick, soft, and flexible
• B. Thin, soft, and flexible
• C. Thin, hard, and immovable
• D. Thick, hard, and flexible

Explanation: At joints, the exoskeleton is quite thin and flexible as it lacks a cuticle and helps in the movement of muscles of the arthropods.

• A. Pituitary gland
• B. Adrenal gland
• C. Rectal gland
• D. Both Pituitary and Rectal glands

Explanation: The pituitary gland's posterior lobe is largely made up of axons of neurosecretory cells of the hypothalamus where ADH is produced.

• A. Anhydrobiosis
• B. Osmoregulators
• C. Thermoregulatory
• D. Osmoconformers

Explanation: "Osmoregulators" tightly regulate their body osmolarity, which always stays constant and is more common in the animal kingdom.

• A. Kangaroo rat
• B. Pig
• C. Camel
• D. Kangaroo

Explanation: Kangaroo rats, because their habitats are hot and dry, must conserve water.

• A. Netted capillaries
• B. Afferent capillaries
• C. Peritubular capillaries
• D. Vasa recta

Explanation: The network of capillaries parallel to the loop of henle is called vasa recta.

• A. Ultrasound
• B. Lithotripsy
• C. Dialysis
• D. X-rays

Explanation: Extracorporeal shock wave lithotripsy is a technique for treating stones in the kidney and ureter that does not require surgery.

• A. Aldosterone
• B. ADH
• C. Glucosterone
• D. Thyroxin

Explanation: Antidiuretic hormone (ADH)is a chemical produced in the brain that causes the kidneys to release less water, decreasing the amount of…