Which of the following statements is false? A. The primary electron acceptor is found in the reaction-center complex of a photosystem. B. In the visible spectrum, red light has a shorter wavelength compared to blue light. C. Oxygen is produced from the enzymatic splitting of water during the light reactions of photosynthesis. D. Unsaturated fats tend to be more liquid at room temperature, while saturated fats tend to be more solid at room temperature. E. The glucose monomers in amylopectin and glycogen are bonded together by either α-1,4 glycosidic linkages or α1,6 glycosidic linkages

Explanation:

The gastrointestinal tract (GIT) consists of a hollow muscular tube starting from the oral cavity, where food enters the mouth, continuing through the pharynx, oesophagus, stomach and intestines to the rectum and anus, where food is expelled. There are various accessory organs that assist the tract by secreting enzymes to help break down food into its component nutrients. Thus the salivary glands, liver, pancreas and gall bladder have important functions in the digestive system. Food is propelled along the length of the GIT by peristaltic movements of the muscular walls.

The primary purpose of the gastrointestinal tract is to break food down into nutrients, which can be absorbed into the body to provide energy. First food must be ingested into the mouth to be mechanically processed and moistened. Secondly, digestion occurs mainly in the stomach and small intestine where proteins, fats and carbohydrates are chemically broken down into their basic building blocks. Smaller molecules are then absorbed across the epithelium of the small intestine and subsequently enter the circulation. The large intestine plays a key role in reabsorbing excess water. Finally, undigested material and secreted waste products are excreted from the body via defecation (passing of faeces).