Biology MCQs

Which organelle is known as the 'powerhouse' of the cell because it generates most of the cell's supply of adenosine triphosphate (ATP)?

In human nutrition, which enzyme is responsible for the initial breakdown of starch in the mouth?

Which nitrogenous base is found in RNA but not in DNA?

What is the primary function of the Golgi apparatus?

In humans, which process occurs in the cytoplasm and results in the production of pyruvate?

Which blood cell type is primarily responsible for the immune response through the production of antibodies?

What is the result of mitosis in a human somatic cell?

Which hormone regulates blood calcium levels by stimulating bone resorption?

What structure in the human lung is the primary site of gas exchange?

Which process describes the movement of water molecules across a semi-permeable membrane from an area of high concentration to an area of low concentration?

Which vitamin is synthesized by human skin upon exposure to ultraviolet B (UVB) radiation?

In the human digestive tract, which organ is primarily responsible for the absorption of water and electrolytes?

Which of the following describes the role of insulin in the human body?