Biology

Dental and Oral Biology

924 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 biology health and hygiene life is precious road safety and pollution personal health care

What causes tooth decay?

  1. Acid

  2. Alkaline

  3. Caffeine

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

  • Cavities, also called tooth decay or caries, are caused by a combination of factors, including bacteria in your mouth, frequent snacking, sipping sugary drinks, levels of acid in food and not cleaning your teeth well. 
  • Cavities and tooth decay are among the world's most common health problems.  
  • Sugar isn't the only culprit when it comes to tooth decay. High levels of acid in everyday foods and drinks can be just as harmful. From oranges to wine, high-acid foods and drinks can wear away your teeth, causing decay, sensitivity and discolouring. Hence,  Acid causes tooth decay.
  So, the correct answer is 'acid'.

Multiple choice botany plant tissues introduction to tissue tissues - "the teams of workers" introduction to tissues

Name the tissues found in tooth.

  1. Enamel

  2. Cementum

  3. Dentin

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

A tooth consists of enamel, dentin, cementum and pulp tissue. The portion of a tooth exposed to the oral cavity is known as the dental crown, and the portion below the dental crown is known as the tooth root. Thus, the correct answer is option D.

Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Which of the following is not true for the care of teeth?

  1. We should not chew the food.

  2. We should not eat too many sweets.

  3. We should brush twice a day.

  4. We should eat raw fruits and vegetables.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Care of the teeth should be taken by:
  1. Brush your teeth 2 times a day with fluoride (“FLOOR-ide”) toothpaste.
  2. Visit a dentist regularly for a checkup and cleaning.
  3. Cut down on sugary foods and drinks.
  4. Don't smoke or chew tobacco etc. Hence, We should not chew the food is not true for the care of teeth.
So, the correct answer is 'We should not chew the food'.
Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

The soft, sticky layer formed on the tooth which is harmful is 

  1. Enamel

  2. Plaque

  3. Dentine

  4. Pulp
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Plaque is a soft, sticky film that builds up on your teeth and contains millions of bacteria. 
  • When you eat, the bacteria in plaque use the sugars in your food to produce acids that eat away at the tooth enamel.  Hence, The soft, sticky layer formed on the tooth which is harmful is a plaque.
So, the correct answer is 'plaque'.
Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

A dental disease characterised by mottling of teeth is due to the presence of an ingredient in drinking water, namely 

  1. Fluorine

  2. Mercury

  3. Boron

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

A dental disease characterised by mottling of teeth is due to the presence of an ingredient in drinking water, namely fluorine. Dental fluorosis or mottling of tooth enamel is a developmental disturbance of dental enamel caused by the consumption of excess fluoride during tooth development. The risk of fluoride overexposure occurs at any age but it is higher at younger ages.

Therefore, the correct answer is option A.

Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

The major reason for tooth decay are 

  1. Chocolates

  2. Sweets

  3. Cold drinks

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

Tooth decay is the softening of teeth enamels and refers to the damage of the structure of the tooth. This occurs due to high consumption of chocolates, sweets and cold drinks. Tooth decay is caused by acids that are created when plaque bacteria break down sugar in the mouth. 

So, the correct answer is  'All of the above'.

Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

The measures to prevent tooth decay are

  1. Dental floss

  2. Brush

  3. Rinsing the mouth after meals

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

Tooth decay starts with the erosion of tooth enamel and leads to holes in teeth called cavities. The measures to prevent tooth decay are to brush the teeth twice a day, dental floss, skip sugar, rising the mouth after meals.

So the correct answer is "All of the above". 

Multiple choice business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

How many times will you brush your teeth. The answer is an example of which type of variable?

  1. continuous

  2. dependent

  3. nominal

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

A discrete variable is a variable whose value is obtained by counting.
So, how many times will you brush your teeth is countable.

Multiple choice chemistry introduction to acid and base neutralisations in everyday life acids and bases in daily life neutralisation reaction

To protect tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is:

  1. acidic

  2. basic

  3. netural

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

Mouth has salivary amylase enzyme and the process of digestion starts from mouth making the acidic environment which causes the tooth decay so it is neutralized by using toothpaste basic in nature.

Multiple choice

I need to go to the dentist. I've got a ...

  1. toothache

  2. tooth ache

  3. teethache

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

The correct compound noun is 'toothache'. The other options are either misspelled or use the plural 'teeth' incorrectly in this context.