Digestive glands MCQ Advance Level

Digestive glands -Advance Level

Dear Readers,

Compared to other sections, Zoology is considered to be the most scoring section. If prepared thoroughly, Zoology can help students to secure a position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Which one of the following statements about glycogen is correct

•  It is a disaccharide stored in liver which can react with ammonia to form proteins
•  It is synthesised in the liver and takes part in the formation of bile and lipase, besides being a source of energy
•  It is a polysaccharide which is synthesised and stored in liver cells
•   It is synthesised in blood and stored in liver and muscles to provide glucose in times of need

Glycogen is a multibranched polysaccharide of glucose. Glycogen is the storage form of glucose in animals and humans. Glycogen is synthesized and stored mainly in the liver and the muscles.

Q2. Liver does not synthesize

•  Fibrinogen
•  Albumin
•  Prothrombin
•  Gamma globulin

The liver plays a major role in carbohydrate, protein, amino acid, and lipid metabolism. The liver performs several roles in carbohydrate metabolism

Q3. Which of the following digestive juices have the minimum pH

•  Bile
•  Saliva
•  Gastric juice
•  Pancreatic juice

The pH of gastric acid is 1.5 to 3.5. Parietal cells (also known as oxyntic cells) secrete gastric acid. Gastric acid is a digestive fluid, formed in the stomach. The acid plays a key role in digestion of proteins. Bile juice has PH in between 7-8.saliva has PH of 6.2 to 7.6. The pancreatic juice has PH in between 7.5-8.2.

Q4. Synthesis of glycogen from sugar in the liver is known as

•  Glycogenesis
•  Glycolysis
•  Glycogenolysis
•  Glucolysis

In response to insulin levels being below normal (when blood levels of glucose begin to fall below the normal range), glucagon is secreted in increasing amounts and stimulates both glycogenolysis and gluconeogenesis .

Q5. Enzyme arginase is found in

•   Mouth cavity
•  Stomach
•   Intestine
•  Liver

Arginase is an enzyme involved in the urea cycle that helps in the conversion of L-arginine to L-ornithine and urea.

Q6. The liver of carnivorous is larger than the herbivorous because in carnivorous

•   Their body is also big
•  The diet contains much more proteins so liver has to do more work
•  The problem of phagocytosis by Kupffer cells are more
•  None of these

Animal flesh is composed of the most highly complex type of protein and requires vast amounts of uric acid to process. Uric acid is released into the system in amounts necessary to break proteins down into amino acids. Uric acid is a toxic substance and must be flushed out by the liver. Hence the carnivore's liver is designed with the capacity to eliminate ten times as much uric acid as the liver of man or other plant eaters.

Q7. Which of the following is not a human salivary gland [AIIMS ]

•  Parotid
•  Submaxillary
•  Sublingual
•  Infra-orbital

In rabbit there are four pairs of salivary glands: 1. parotid gland, 2. submaxillary gland, 3.sublingual gland and 4.infra orbital. The infra orbital gland is absent in human beings.

Q8. Spot the salivary gland among the following [KCET (Med.) 1999]

•  Sublingual
•  Adrenal
•  Brunner
•  Lacrimal

In human, 3.pairs of salivary glands are present. They are sublingual , parotid and submaxillary

Q9. When a piece of bread is chewed it tastes sweet because

•  The sugar contents are drawn out
•  Saliva converts starch into maltose
•  It does not taste sweet
•  The taste buds are stimulated by chewing

Saliva of mouth contains salivary amylase an enzyme which converts starch into maltose and breaks it into a simpler form which gives a sweet taste.

Q10. If liver becomes functionless, percentage of which will increase in blood

•  Uric acid
•  Ammonia
•  Urea
•  Protein

Ammonia