- 1 Which of the following is true regarding starch and cellulose?
- 2 Which of the following statements is true regarding digestion and absorption of food in humans?
- 3 Which statement is true about digestion?
- 4 Which statement describes the structure of starch?
- 5 Why can humans digest starch and not cellulose?
- 6 Where does fat digestion occur?
- 7 Which of the following is an accessory organ of digestion?
- 8 Where does digestion start?
- 9 What are the 2 types of digestion?
- 10 What are the three phases of gastric activity?
- 11 Where are enterocytes found?
- 12 What is the structure and function of starch?
- 13 Which statement best describes starch and glycogen?
- 14 What is structure of starch?
Which of the following is true regarding starch and cellulose?
Answer: Option A. Explanation: Starch and cellulose are polymers of glucose and are formed by monomers of glucose joined together. Starch is formed from alpha glucose, cellulose is formed from beta glucose.
Which of the following statements is true regarding digestion and absorption of food in humans?
So, the correct answer is ‘ Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+’.
Which statement is true about digestion?
Digestion is a form of catabolic activity because it involves the breaking down of food into smaller sizes that can be absorbed as nutrients by the body while releasing energy through the process. The statement about digestion which is true is that, gastric juice helps to process food into chyme.
Which statement describes the structure of starch?
Answer: It consists of two types of molecules: the linear and helical amylose and the branched amylopectin. Depending on the plant, starch generally contains 20 to 25% amylose and 75 to 80% amylopectin by weight. Glycogen, the glucose store of animals, is a more highly branched version of amylopectin.
Why can humans digest starch and not cellulose?
The acetal linkage is beta which makes it different from starch. This peculiar difference in acetal linkages results in a major difference in digestibility in humans. Humans are unable to digest cellulose because the appropriate enzymes to breakdown the beta acetal linkages are lacking.
Where does fat digestion occur?
The majority of fat digestion happens once it reaches the small intestine. This is also where the majority of nutrients are absorbed. Your pancreas produces enzymes that break down fats, carbohydrates, and proteins. Your liver produces bile that helps you digest fats and certain vitamins.
Which of the following is an accessory organ of digestion?
The salivary glands, liver, gallbladder, and pancreas are not part of the digestive tract, but they have a role in digestive activities and are considered accessory organs.
Where does digestion start?
Digestion begins in the mouth. The food is ground up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called an enzyme, which starts breaking down carbohydrates into sugars.
What are the 2 types of digestion?
Digestion is a form of catabolism or breaking down of substances that involves two separate processes: mechanical digestion and chemical digestion. Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion.
What are the three phases of gastric activity?
The process of gastric secretion can be divided into three phases ( cephalic, gastric, and intestinal ) that depend upon the primary mechanisms that cause the gastric mucosa to secrete gastric juice.
Where are enterocytes found?
Enterocytes, or intestinal absorptive cells, are simple columnar epithelial cells which line the inner surface of the small and large intestines. A glycocalyx surface coat contains digestive enzymes.
What is the structure and function of starch?
The basic chemical formula of starch (C6H10O5)n is similar to glucose, C6H12O6, where ‘n’ is the number of glucose molecules present. There are two forms of starch: amylose, the branchless form, and amylopectin, the branched form. The main function of starch is as way to store energy for plants.
Which statement best describes starch and glycogen?
Starch is highly branched, while glycogen is linear. The polymer chains in both tend to form a straight molecule. Both have glucose monomers linked by α-1,4 glycosidic bonds.
What is structure of starch?
The basic chemical formula of the starch molecule is (C6H10O5)n. Starch is a polysaccharide comprising glucose monomers joined in α 1,4 linkages. The simplest form of starch is the linear polymer amylose; amylopectin is the branched form.