The hormone insulin is produced by which cells of the pancreas? MCQ with Answer and Explanation

Explanation:
The biceps brachii is a two-headed muscle located in the upper arm, responsible for flexing the elbow. The quadriceps femoris is a large, four-headed muscle group in the front of the thigh, extending the knee. The diaphragm is a dome-shaped skeletal muscle that forms the floor of the thoracic cavity and the roof of the abdominal cavity, crucial for breathing. All statements are correct.

Explanation:
The small intestine (duodenum, jejunum, ileum) is the primary site for enzymatic digestion (by pancreatic enzymes and brush border enzymes) and absorption of nutrients through villi. Stomach initiates protein digestion and absorbs some water/alcohol. Large intestine absorbs water and electrolytes. Esophagus moves food.

Explanation:
RNA is typically single-stranded (A true), but it contains ribose, not deoxyribose. Deoxyribose is in DNA. Thus R is false.