Biology

Dental and Oral Biology

967 Questions

Dental and Oral Biology focuses on the structure, development, and function of teeth and oral tissues. It covers key concepts like dental formulas, tooth eruption, and common oral diseases. These topics are essential for medical and biology entrance examinations.

Dental formulaTooth anatomyMilk teethOral diseasesTooth decay

Dental and Oral Biology Questions

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

Which of the following is vestigial teeth found in human?

  1. Incisors

  2. Premolars

  3. Diphyodont

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

Wisdom teeth are vestigial third molars, that help human ancestors in grinding down plant tissue. The skulls of human ancestors had larger jaws with more teeth to efficiently digest the cellulose that makes up a plant cell wall. As human diets changed, smaller jaws were naturally selected, yet the third molars or wisdom teeth still develop in humans.

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

Wisdom teeth in human is

  1. $3^{rd}$molar and 4 in number
  2. $3^{rd}$ molar and 2 in number
  3. $2^{nd}$molar and 4 in number
  4. $2^{nd}$ molar and 2 in number
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In humans, there are 32 teeth present in which four different types of teeth are present and is known as heterodont dentition. In these four types canines,

incisors, premolar and two molars are present are the permanent teeth but and are 28 in number but the third molar appears late in life and is known as wisdom tooth which is four in number an form 32 teeth.
So the correct option is '$3^{rd}$ molar and 4 in number'.

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

Which one is wisdom teeth

  1. Third molar, four in number

  2. Third molar, two in number

  3. Second molar, four in number

  4. Second molar, two in number
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wisdom teeth are the third molars, and there are typically four of them in an adult set (one in each quadrant).

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

Similar cone-shaped teeth are

  1. Diphyodont

  2. Acrodont

  3. Homodont

  4. Thecodont

  5. Heterodont
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Homodont teeth are teeth that are all similar in shape and size, commonly found in many reptiles and fish. Heterodont refers to teeth of different shapes, like in humans.

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

Type of teeth present in humans is

  1. Diphyodont and homodont

  2. Monophyodont and thecodont

  3. Monophyodont and homodont

  4. Diphyodont and heterodont
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humans are diphyodont because they have two sets of teeth (milk and permanent) and heterodont because they have different types of teeth (incisors, canines, premolars, 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

Which are cutting teeth in humans?

  1. Canines

  2. Molars

  3. Premolars

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

Incisors are the sharp, chisel-shaped front teeth primarily responsible for cutting and biting food. Canines are for tearing, while premolars and molars are for grinding.

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

Diastema is associated with

  1. Organ of Corti

  2. Absence of certain teeth

  3. Retinal cells

  4. Presence of teeth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A diastema is a gap or space between two teeth. It is commonly observed in animals like herbivores where certain teeth are absent.

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

Which teeth of human are shovel-shaped and used for nibbling, cutting and tearing

  1. Canines

  2. Premolars

  3. Molars

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

Incisors are the front teeth shaped for cutting and nibbling. Canines are pointed for tearing, and molars are for grinding.

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

Primary dentition in humans differs from permanent dentition in not having one of the following teeth

  1. Canines

  2. Pre-molars

  3. Molars

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

Primary (deciduous) dentition lacks premolars. The permanent set includes premolars, which replace the primary 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

Eye teeth are

  1. Upper incisors

  2. Lower incisors

  3. Lower canines

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

Canines in the upper arch are also often called “eye teeth,” which, when you come to think of it, is kind of a weird name for them. But the most common explanation is actually pretty simple: these teeth lie directly below the eye sockets.


So, the correct option is 'Upper canines'.

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

Which one of the following pairs of types of teeth perform one common function as stated against it?

  1. Incisors, canines - Holding

  2. Canines, premolars - Biting

  3. Premolars, molars - Grinding

  4. Molars, incisors - Tearing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both premolars and molars are posterior teeth that feature broad, flattened surfaces specifically adapted for crushing and grinding food. The other pairings mismatch tooth types with functions, such as incisors being for biting and canines for tearing.

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

Choose the correct answers from the alternatives given.
In mammals, mastication of the food is done by

  1. molars

  2. premolars

  3. incisors

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

  • The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. 
  • They are used primarily to grind food during chewing.
  • Molars show a great deal of diversity in size and shape across mammal groups. Hence, in mammals, mastication of the food is done by molars.
So, the correct answer is 'molars'.