Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

Multiple choice bio-chemistry digestive system of human digestive system - organs process of digestion coordination in the process of digestion

The tongue helps in mixing food with saliva.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Digestion starts from the mouth. The salivary gland in the mouth secretes saliva, with the help of tongue saliva mixes with the food when is chewed. The tongue is a muscle with glands, sensory cells, and fatty tissue that helps to moisten food with saliva.

So, the correct answer is option A.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Partially digested food in ruminants is

  1. Chyme

  2. Cud

  3. Bolus

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through bacterial actions. The process typically requires the fermented cud to be regurgitated and chewed again. The process of re chewing the cud to further break down plant matter and stimulate digestion is called rumination. Thus, option B is correct. Chyme is the semifluid mass of partly digested food that is expelled by the stomach into the duodenum and moves through the intestines during digestion. Bolus is a small rounded mass of a substance, especially of chewed food at the moment of swallowing. 

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

The opening of the stomach in duodenum is regulated by  

  1. Sphineter of Oddi

  2. Pyloric sphincter

  3. Gastro-oesophageal

  4. Ileo-caeeal valve
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A. Sphincter of Oddi is the opening of the hepatopancreatic duct into duodenum.

B. Pyloric sphincter is found between the duodenum and posterior stomach. It regulates the opening of duodenum into stomach.
C. Gastro-oesophageal sphincter is found between the oesophagus and stomach.
D. Ileo-caecal valve is present between ileum of small intestine and caecum of large intestine.
So, the correct answer is 'Pyloric sphincter'.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Which animal out of the following has the longest food-pipe?

  1. Girraffe

  2. Camel

  3. Whale

  4. Yak
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The esophagus commonly known as the food pipe or gullet (gut), is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.The giraffe has the longest neck of any land mammal, due to which the food pipe Measures about 6.5 feet in length, making it an animal with the longest food pipe as well.
So, the correct answer is 'Giraffe'.
Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Digestion of starch starts from

  1. Stomach

  2. Intestine

  3. Oesophagus

  4. Mouth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Digestion starts in mouth and starch is the biomolecule whose digestion is first carried out by Ptyalin enzyme present in saliva.
No digestion occurs in oesophagus. It functions to transport semi solid bolus of food from mouth to stomach.
Intestine comes after stomach. Stomach is important for digestion of proteins.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Digestion of food in human starts from

  1. Duodenum

  2. Small intestine

  3. Mouth

  4. Large intestine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Digestion of food starts in mouth. It is carried out in following two ways

  • Mechanical digestion which is breaking of food into smaller chunks with the help of teeth and aided by muscular tongue.
  • Chemical digestion due to ptyalin (salivary amylase) in saliva
  • So, the correct answer is 'Mouth'

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

Which of the following forms the inner lining of the mouth?

  1. Pleura

  2. Mucous membrane

  3. Pericardium

  4. Meninges
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The alimentary canal begins with an anterior opening the mouth, and it opens out posteriorly through the anus. The mouth leads to the buccal cavity or oral cavity. The oral cavity has 32 teeth and a muscular tongue. The buccal cavity is lined with mucous membrane, whose secretions keep mouth moist.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

The structure, which prevents entry of food into wind pipe during swallowing in mammals is

  1. Larynx

  2. Glottis

  3. Epiglottis

  4. Pharynx
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The oral cavity leads into a short pharynx, which serves as a common passage for food and air. The oesophagus and the trachea (wind pipe) open into the pharynx. A cartilaginous flap, called as epiglottis, prevents the entry of food into the glottis opening of the wind pipe during swallowing.