Digestive System (Part-II)

Total Questions: 28

11. The inner walls of small intestine have thousands of finger-like outgrowths. These are called : [S.S.C. Online CHSL (T-I) 14.01.2020 (Shift-III)]

(a) Lumps
(b) Villi
(c) Benign
(d) Myomas

Correct Answer: (b) Villi

Solution:The small intestine is the primary site for nutrient absorption. Its inner lining is highly folded and covered with millions of tiny, finger-like projections called villi (singular: villus). These villi, in turn, have even smaller microscopic projections called microvilli on their surface. This extensive folding and the presence of villi and microvilli dramatically increase the surface area available for absorption, making digestion and nutrient uptake highly efficient.ll intestine have thousands of finger-like outgrowths. These are called villi (singular villus). The structure of the small intestine is designed for absorption of nutrients. The inside of the small intestine is lined with villi that absorb nutrients from the liquid mixture called chyme produced in the stomach from the food we eat.

12. In which form is glucose stored in our body? [S.S.C. Online CHSL (T-I) 21.01.2017 (Shift-III)]

(a) Insulin
(b) Glucose
(c) Glycogen
(d) Fat

Correct Answer: (c) Glycogen

Solution:Glucose is the body's primary source of energy. When there's an excess of glucose beyond immediate energy needs, it is converted into a complex polysaccharide called glycogen. Glycogen is stored mainly in the liver and muscles. This stored glycogen can be quickly broken down back into glucose when energy is needed.

13. About 70% of the human body energy requirement should be met by ______. [S.S.C. Online MTS (T-I) 10.01.2017 (Shift-I)]

(a) Amino acids
(b) Fat
(c) Lipids
(d) Carbohydrates

Correct Answer: (d) Carbohydrates

Solution:Carbohydrates are the body's preferred and most readily available source of energy. They are quickly broken down into glucose, which cells use for fuel. While fats provide more energy per gram, carbohydrates are typically recommended to make up the largest portion of daily caloric intake for sustained energy.

14. The molecule used by most animals for long term energy storage is ______ . [S.S.C. Online MTS (T-I) 15.01.2017 (Shift-II)]

(a) Vitamin
(b) Fat
(c) Cholesterol
(d) Roughage

Correct Answer: (b) Fat

Solution:While glycogen provides short-term glucose storage, fats (lipids) are the primary form of long-term energy storage in animals. Fats are very energy-dense (9 kcal/gram) and can be stored in adipose tissue, providing a compact and efficient reserve for extended periods.

15. Name the enzyme in the human body which helps break down carbohydrates. [S.S.C. Online Graduate Level (T-I) 19.06.2019 (Shift-III)]

(a) Protease
(b) Lipase
(c) Peptidase
(d) Amylase

Correct Answer: (d) Amylase

Solution:Amylase is the key enzyme involved in the digestion of carbohydrates. Salivary amylase (ptyalin) starts the process in the mouth, breaking down starches into smaller polysaccharides and disaccharides. Pancreatic amylase continues this breakdown in the small intestine.

16. In which of the following forms are carbohydrates stored in our body? [S.S.C. JE Electrical Exam 28.01.2020 (Shift-I)]

(a) Lactose
(b) Glucose
(c) Glycogen
(d) Cellulose

Correct Answer: (c) Glycogen

Solution:The human body uses carbohydrates in the form of glucose. Glucose is stored in the liver and muscles as glycogen.

17. Yeast is a ______ . [S.S.C. Online Graduate Level (T-I) 9.09.2016 (Shift-III)]

(a) Bacteria
(b) Fungus
(c) Algae
(d) Bryophyte

Correct Answer: (b) Fungus

Solution:Yeast is a single-celled microorganism classified as a fungus. It is well-known for its ability to perform fermentation, converting sugars into alcohol and carbon dioxide, which is utilized in baking (bread making) and brewing (alcoholic beverages).

18. Which of the following is the main end product of carbohydrate digestion? [S.S.C. Online CHSL (T-I) 23.01.2017 (Shift-II)]

(a) Fats
(b) Lipids
(c) Glucose
(d) Cellulose

Correct Answer: (c) Glucose

Solution:Carbohydrates (polysaccharides and disaccharides) are broken down by various enzymes (like amylase, maltase, sucrase, lactase) throughout the digestive tract into their simplest monosaccharide units. The primary and most abundant end product of carbohydrate digestion that is absorbed into the bloodstream is glucose.

19. Muscular contractions of alimentary canal are _____ . [S.S.C. Online MTS (T-I) 6.01.2017 (Shift-I)]

(a) Digestion
(b) Chewing
(c) Peristalsis
(d) Churning

Correct Answer: (c) Peristalsis

Solution:Peristalsis is a series of wave-like muscular contractions that occur in the walls of the alimentary canal (oesophagus, stomach, intestines). These involuntary contractions propel food through the digestive tract.

20. How many canine teeth are there in an adult human? [S.S.C. Online C.P.O.S.I. (T-I) 5.01.2017 (Shift-II)]

(a) 2
(b) 6
(c) 4
(d) 8

Correct Answer: (c) 4

Solution:An adult human typically has 32 permanent teeth. The dental formula includes:

Incisors: 8 (4 upper, 4 lower, for biting)
Canines: 4 (2 upper, 2 lower, for tearing food)
Premolars: 8 (4 upper, 4 lower, for crushing)
Molars: 12 (6 upper, 6 lower, for grinding) So, there are 4 canine teeth in total.

« Previous 123 Next »