Which organelle is known as the 'powerhouse of the cell'?

Mitochondria produce ATP, the energy currency of the cell, through cellular respiration.

The basic structural and functional unit of all living organisms is the:

Cells are the smallest units of life and perform all life processes.

Which part of the human brain controls balance and coordination?

The cerebellum is responsible for motor control, balance, and coordination.

Red blood cells (erythrocytes) are primarily produced in the:

Bone marrow is the primary site for hematopoiesis, the production of blood cells.

The process by which cells divide to produce two identical daughter cells is called:

Mitosis is the process of cell division that results in two genetically identical daughter cells.

Which of the following is the largest organ in the human body?

The skin is the largest organ by surface area and weight.

The liquid portion of blood (without clotting factors) is called:

Serum is plasma without clotting factors like fibrinogen.

Which organelle is responsible for protein synthesis?

Ribosomes translate mRNA into proteins.

The human heart has how many chambers?

The heart has two atria and two ventricles, totaling four chambers.

Which type of blood vessel carries blood away from the heart?

Arteries carry oxygenated blood away from the heart to the body.

The structural framework inside a cell that provides shape and support is the:

The cytoskeleton maintains cell shape and enables movement.

Which vitamin is produced by the human skin when exposed to sunlight?

Sunlight triggers the synthesis of Vitamin D in the skin.

The smallest and most numerous blood cells in the body are:

Platelets are small cell fragments involved in blood clotting.

The main function of white blood cells (leukocytes) is to:

White blood cells are part of the immune system and defend against pathogens.

Which organelle contains digestive enzymes to break down waste?

Lysosomes contain enzymes that digest waste and cellular debris.

The process by which plants make food using sunlight is called photosynthesis. In humans, the process of breaking down food for energy is called:

Cellular respiration converts food into usable energy (ATP).

Which of the following is NOT a primary tissue type in the human body?

Skeletal is a type of connective tissue, not a primary tissue type.

The pigment responsible for oxygen transport in red blood cells is:

Hemoglobin binds oxygen in red blood cells for transport.

The longest bone in the human body is the:

The femur is the thigh bone and the longest bone in the body.

Which organ filters waste products from the blood to produce urine?

The kidneys filter blood and produce urine as a waste product.

The jelly-like substance inside a cell (excluding the nucleus) is called:

Cytoplasm is the fluid that fills the cell and surrounds organelles.

Which part of a neuron receives signals from other neurons?

Dendrites receive incoming signals from other neurons.

The enzyme in saliva that begins starch digestion is:

Salivary amylase breaks down starch into simpler sugars.

Which organelle is responsible for modifying, sorting, and packaging proteins?

The Golgi apparatus processes and packages proteins for secretion.

The normal resting heart rate for an average healthy adult is approximately:

A normal resting heart rate for adults is typically 60–100 beats per minute.

Which of the following is a prokaryotic cell?

Prokaryotes, like bacteria, lack a nucleus and membrane-bound organelles.

The voice box in humans is also known as the:

The larynx houses the vocal cords and is responsible for sound production.

Which part of the digestive system absorbs most nutrients?

The small intestine is the primary site for nutrient absorption.

The membrane that surrounds the cell and controls what enters and leaves is the:

The plasma membrane is a selective barrier that regulates cell transport.

Which blood type is known as the universal donor?

O- blood lacks A, B, and Rh antigens, making it compatible with all blood types.