Chapter U2.14, Problem 5E

Interpretation Introduction

Interpretation:

Smell of popcorn and freshly baked bread is similar. This must be explained with the help of receptor site theory.

Concept introduction:

Receptor site theory states that molecule from substance will bind specifically with nasal receptor due to complementary structure.

Answer to Problem 5E

Smell of two substances might be same if similar molecules reach to the nasal receptor from the two substances.

Explanation of Solution

Poppcorn and freshly baked bread have carbohydrate like starch. As the two food contain same molecule which can bind in a similar way to the nasal receptor, so nerve impulse can be generated and will reach the brain. So both the food have same smell.

Conclusion

When odoring molecules are same in different food then the smell of those foods is same.