All Free Biology MCQs with Answers

• A. 4 Vertebrae
• B. 5 Vertebrae
• C. 6 Vertebrae
• D. 3 Vertebrae

Explanation: The sacrum is formed by the fusion of five vertebrae (S1-S5) in the pelvic region of the human body.

• A. Compact bone
• B. Cartilage
• C. Osteoblast cells
• D. Osteoclast cells

Explanation: The spongy bone is usually surrounded by a shell of the compact bone which provides added strength and rigidity.

• A. Haversian canals
• B. Canaliculus
• C. Bone marrow tissues
• D. Calcium phosphate

Explanation: Calcium phosphate is responsible for the mineralization of the bones that essentially gives them their rigidity.

• A. 8
• B. 14
• C. 20
• D. 22

Explanation: The skull is a complex of 22 bones which can be divided into two categories: the cranium and the facial bones.

• A. 33 bones
• B. 24 bones
• C. 12 bones
• D. 7 bones

Explanation: The spine or the vertebrae consists of 33 bones interlocked with each other to give the spinal column.

• A. Tail bone
• B. Hip bone
• C. Skull bone
• D. Shoulder bone

Explanation: The scapula or shoulder blade is the bone that connects the clavicle to the humerus.

• A. There are many blood vessels in cartilage
• B. It is a form of connective tissue
• C. It covers ends of the bones at joints
• D. It is much softer than bone

Explanation: This statement is false. Cartilage is avascular, meaning it does not contain blood vessels.

• A. Connective tissues
• B. Epithelial tissues
• C. Muscular tissues
• D. Nervous tissues

Explanation: Cartilage is a type of connective tissue. It is a flexible and semi-rigid tissue found in various parts of the body, including the joints…

• A. Temporal
• B. Occipital
• C. Frontal
• D. Vomer

Explanation: The temporal bones are located on the sides and base of the skull, near the ears.

• A. 70%
• B. 20%
• C. 99%
• D. 60%

Explanation: Bone cells are composed of approximately 20% water, which is essential for facilitating cellular functions and maintaining the hydration…

• A. Humerus
• B. Ulna
• C. Femur
• D. Radius

Explanation: The femur extends from the hip joint to the knee joint, forming the upper leg. It connects the pelvis to the tibia (shinbone).

• A. Osteoblasts
• B. Osteocytes
• C. Osteoclasts
• D. Osteons

Explanation: Osteoblasts are cells responsible for bone formation. They synthesize and secrete the bone matrix, which is primarily composed of collagen…

• A. Ball and socket
• B. Pivot
• C. Hinge
• D. Fibrous

Explanation: The joint in the neck that allows the head to move back and forth is an example of a pivot joint.This option is not correct.

• A. Hinge Joints
• B. Fibrous Joints
• C. Ball and Socket Joints
• D. Cartilaginous Joints

Explanation: Explanation:The joints that allow movements in several directions are called ball and socket joints.

• A. Hinge joint
• B. Ball and Socket joint
• C. Cartiligious joint
• D. Fibrous joint

Explanation: Ball and socket joint allows movement in all directions as it enables movement around an indefinite number of axes.

• A. Joints
• B. Cartilages
• C. Fibrous capsules
• D. Ligaments

Explanation: The correct answer is Ligaments. Ligaments are fibrous connective tissues that connect bones to other bones, providing joint stability and…

• A. Ball and Socket Joint
• B. Hinge Joint
• C. Fibrous Joint
• D. Cartilaginous Joints

Explanation: The correct answer is the 'Ball and Socket Joint.' Both the hip and shoulder joints exemplify this type of synovial joint, characterized…

• A. Hip and shoulder joints
• B. Hip and knee joints
• C. Shoulder and knee joints
• D. Hip and elbow joints

Explanation: The ball and socket joint, also called the spheroidal joint, is a joint in which the ball-like rounded surface of a bone moves within a…

• A. Humerus and radio-ulna
• B. Femur and pectoral girdle
• C. Femur and acetabulum
• D. Humerus and pectoral girdle

Explanation: A hinge joint is a type of synovial joint that allows movement in only one plane, like the opening and closing of a door.

• A. Ureter
• B. Urethra
• C. Pelvis
• D. Urinary Bladder

Explanation: Explanation:The central cavity of the kidney is known as the renal pelvis.