ChemCom Unit 7 Section B Test

What is the chemical formula for glucose, a key energy-releasing carbohydrate in biological systems?

What ratio of hydrogen atoms to oxygen atoms is found in carbohydrates? (use glucose ratio)

• 1:1

• 2:1

• 1:2

• 3:1

Which of the following is NOT a polysaccharide?

• Starch

• Cellulose

• Sucrose

• Polymer of monosaccharide

How many Calories of food energy are provided by 1 gram of carbohydrates?

• 9 Calories

• 7 Calories

• 4 Calories

• 2 Calories

What percentage of dietary Calories should come from high-fiber carbohydrates?

• 15-25%

• 35-50%

• 45-65%

• 85-95%

What distinguishes fats from carbohydrates in terms of molecular composition?

• Fats contain more nitrogen

• Fats contain more oxygen

• Fats contain fewer oxygen atoms and more carbon and hydrogen atoms

• Fats and carbohydrates have identical compositions

What functional group is found at one end of fatty acid molecules?

• Hydroxyl group (-OH)

• Carboxylic acid group (-COOH)

• Amino group (-NH2)

• Phosphate group (-PO4)

What is a triglyceride composed of? (we know glyceride means fat- use prefix + fat to help you)

• Three glycerol molecules and one fatty acid

• One glycerol molecule with three fatty acids

• Three glycerol molecules and two fatty acids

• One glycerol molecule and one fatty acid

What characterizes a saturated fat?

• Contains double bonds between carbon atoms

• Contains only single carbon-carbon bonds

• Contains triple bonds between carbon atoms

• Contains no hydrogen atoms

What is atherosclerosis?

• Buildup of protein in arteries

• Hardening of the bones

• Softening of the arteries

• Hardening of the arteries