Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem

Eating a healthy diet entirely of plant foods requires combining foods to obtain all essential _______.

  1. a. saturated fats
  2. b. monosaccharides
  3. c. enzymes
  4. d. amino acids

Summary Introduction

Introduction: Amino acids are the basic units that combine to form proteins. There are some amino acids that our body could not produce and those are called essential amino acids. Essential amino acids must be supplied through diet. Out of the 20 amino acids, there are 9 essential amino acids obtained from the diet. The diet should include complete protein that is the adequate portion of the entire 9 amino acids which should be included. All essential amino acids are not present in one food. Therefore, it is recommended to take combined foods that can fulfill all the dietary requirements.


Reason for the correct answer: Plant-based foods can provide all the essential amino acids for the dietary protein requirement. However, only one type of fruit or vegetable intake cannot meet the daily requirement, as most of them are incomplete proteins that lack one or more essential vitamins in them. So, it is recommended to take combining foods to get the complete source of protein.

Option d. is given as “amino acids”. Essential amino acids are obtained by eating plant foods but only through combining foods.

Hence, the correct answer is option d.

Reasons for the incorrect answers:

Option a. is given as “saturated fats”. The fat molecules that are saturated with hydrogen molecules and lack double bond between the carbon molecules are termed as saturated fats...

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