Name: Euizabca Exercise 3-Chemical Aspects of Life True or False 2. 3. and phosp

Question

Name: Euizabca Exercise 3-Chemical Aspects of Life True or False 2. 3. and phosphorus The simplest of carbohydrates are disaccharides edict's reagent is used to test for the presence of protein. The bulk of cell dry weight consists of carbon, hydrogen, oxygen, nitrogen, Triglycerides are the largest class of lipids. The Sudan stain test is used to determine the presence of lipids. Multiple Choice 1. Sugars that consist of two monosaccharides linked together are called: a. carbohydrates c. disaccharides b. starch d. reducing sugars 2. Oily, waxy compounds that usually are insoluble in water are called: a. proteins c. amino acids b. carbohydrates d. lipids 3. amino acids commonly are found in living systems. a. 20 C. 64 b. 14 d. 4 Short Answer The four major types of organic compounds are: 1. 2. 3. 4.

Explanation / Answer

Exercise 3:

True/False

1. False (Simplest sugar is monosaccharides)

2. False ( Benedict test is used to detect the reducing sugars, not for proteins)

3. True (The cell dry weight consist of protein, carbohydrate, lipids, and nucleic acid and they are made up of carbon, nitrogen, hydrogen, oxygen and phosphorous)

4. True (They are the largest group of lipids)

5. True (Sudan stain test is used to detect the presence of fat in the sample like feacal sample by pathologist)

Multiple choice.

1. c (Disaccharide is the sugar molecule formed when the two monosaccharides are joined by glycosidic linkage)

2. d ( Lipids are the insoluble oily compounds by their physical property)

3. a ( Each living organism consist of 20 amino acids to synthesize proteins)

Short answer:

The four major types of organic compounds are:

1. Carbohydrate

2. Protein

3. Lipid

4. Nucleic Acid

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