Tag: experiments on digestive enzymes

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Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Teeth that are different in shape, size and function are called as

  1. Acrodont

  2. Pleurodont

  3. Homodont

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

Heterodont is an animal which possesses more than a single tooth morphology. For example, humans possess incisors, canines (eyeteeth), premolars and molars.

Homodont is an animals whose teeth are all of the same type. Most vertebrates except mammals are homodont. 
Pleurodont is a formation of the teeth that are fused  by their sides to the inner surface of the jaw bones.
Acrodont is a formation of the teeth whereby the teeth are consolidated with the summit of the alveolar ridge of the jaw without sockets. The term also refers to species of reptiles that have such a formation.

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Grinding and chewing teeth are called as

  1. Premolars

  2. Canines

  3. Incisors

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

Adult human teeth have 12 molars. They are biggest and strongest teeth. The large surface are o molars helps in grinding and chewing the food. They break up the food into pieces small enough for making it easy to swallow.

So, the correct answer is "Molars".

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Layer of cells that secrete enamel of tooth is 

  1. Osteoblast

  2. Ameloblast

  3. Odontoblast

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

Osteoblast-bone forming cell. Ameloblast-enamel elaborating cell. Odontoblast- dentine elaborating cell. Dentoblast- tooth cell.

Multiple choice evs structure and functions of living organisms -ii experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

The teeth placed at the end of the buccal cavity and help in chewing food are which of the following?

  1. Incisors

  2. Molars

  3. Canines

  4. Premolars
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The most posterior teeth in the mouth are the molars. They have broader and flatter surfaces with 4-5 cusps. They help in chewing and grinding the food.
So the correct answer is 'Molars'.
Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

Saliva contains .......... enzyme which hydrolyses starch into 

  1. Hydrolase, maltase

  2. Amylase, maltose

  3. Amylose, kinase

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The digestion of food begins at the mouth where the saliva is secreted by the salivary gland that contains an enzyme called as salivary amylase enzyme which hydrolyzes starch into maltose but the complete digestion of starch occurs only in the small intestine by the action of pancreatic amylase. 

Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

If you chew on a piece of bread long enough, it will begin to taste sweet because

  1. maltase is breaking down maltose

  2. lipases are forming fatty acids

  3. amylase is breaking down starches to disaccharides

  4. disaccharides are forming glucose.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When you chew a piece of bread long enough, it will begin to taste sweet because amylase breaks down the starch to disaccharides.  

So the correct option is C.

Multiple choice biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

Emulsification of facts is done by-

  1. Saliva

  2. bile

  3. gastric juices

  4. intestinal juices
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chemical digestion takes place as lingual lipase, an enzyme in your saliva, begins to emulsify fat and saliva moistens the food to make it easier to swallow. When the food reaches your stomach, the muscles there begin to churn and move to further break it down. So the correct option is 'Saliva'.