Assertion (A): Dentine forms the bulk of the tooth. Reason (R): Dentine is a bone-like structure which covers and fixes the root of a tooth in position. 1. A is True and R is False. 2. A is false and R is True. 3. Both A and R are True. 4. Both A and R are False.

A is True and R is False. Reason — Dentine is the main structural component of a tooth. It lies beneath the enamel and forms the bulk (major portion) of both the crown and the root of the tooth. While dentine is a bone-like tissue, it does not fix the root of the tooth. The structure that covers and anchors the root in position is called cementum, not dentine.

A biology teacher asked her students to give two examples of enzymes which act on different forms of carbohydrates.
Nishtha said: Amylopsin and invertase.
Ankur said: Steapsin and Maltase.
Prakriti said: Ptyalin and Amylopsin.
Aakash said: Maltase and Erepsin.
Who were correct?
Ankur and Aakash
Nishtha and Prakriti
Nishtha and Ankur
Nishtha and Aakash

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Assertion (A): The last molar on each side of both the jaws is called the wisdom tooth as it is responsible for the intelligence of a person.
Reason (R): The wisdom teeth are so called because they appear at an age of about 17-20 years when the human body is reaching maturity.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

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Assertion (A): Both ptyalin and amylopsin are the same with respect to their enzymatic activity.
Reason (R): Both of these enzymes convert starch into maltose.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

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Assertion (A): Pylorus is the structure which prevents the entry of food from the stomach to the oesophagus.
Reason (R): Pylorus has a ring of muscles to keep the opening of the stomach closed like a valve. It is located at the front end of the stomach.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

View Answer

Biology

Assertion (A): Dentine forms the bulk of the tooth.
Reason (R): Dentine is a bone-like structure which covers and fixes the root of a tooth in position.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

Digestive System

Answer

Related Questions

Assertion (A): Both ptyalin and amylopsin are the same with respect to their enzymatic activity.
Reason (R): Both of these enzymes convert starch into maltose.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

Biology

Assertion (A): Dentine forms the bulk of the tooth.Reason (R): Dentine is a bone-like structure which covers and fixes the root of a tooth in position.A is True and R is False.A is false and R is True.Both A and R are True.Both A and R are False.

Digestive System

Answer

Related Questions

Assertion (A): Both ptyalin and amylopsin are the same with respect to their enzymatic activity.Reason (R): Both of these enzymes convert starch into maltose.A is True and R is False.A is false and R is True.Both A and R are True.Both A and R are False.

Assertion (A): Dentine forms the bulk of the tooth.
Reason (R): Dentine is a bone-like structure which covers and fixes the root of a tooth in position.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.

Assertion (A): Both ptyalin and amylopsin are the same with respect to their enzymatic activity.
Reason (R): Both of these enzymes convert starch into maltose.
A is True and R is False.
A is false and R is True.
Both A and R are True.
Both A and R are False.