Campbell Essential Biology (7th Edition)
Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 3, Problem 7SQ
Summary Introduction

Introduction:

There are some essential molecules for all the living organisms. These are classified into 4 classes; proteins, carbohydrates, nucleic acids and lipids. Lipids are one of the essential macromolecules that include the saturated fats.

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ipids that are liquid at room temperature:a. are fats.b. contain more hydrogen atoms than lipids that are solids at room temperature.c. if polyunsaturated, contain several double bonds in their fatty acid chains.d. lack glycerol.e. are not stored in cells as triglycerides.
Which one of the following statements about lipids is correct?a. Saturated fats contain many double bonds.b. Unsaturated fats do not have double bonds.c. Fatty acids contain 9 kilocalories per gram.d. Steroids consist of chain structure molecules.
Which of the following statements about amino acids is true? A. Twenty two amino acids are commonly found in proteins. B. Amino acids are often linked together to form branched polymers. C. All amino acids contain an NH2 and a COOH group. D. Most of the amino acids used in protein biosynthesis have charged side chains.
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