Understanding Biological Molecules

What is the most common molecule in the human body?

• Lipid

• Protein

• Carbohydrate

• Water

Which elements are carbohydrates and lipids primarily made of?

• Carbon, Hydrogen, Nitrogen

• Carbon, Hydrogen, Oxygen

• Hydrogen, Oxygen, Nitrogen

• Carbon, Oxygen, Sulfur

What are the three main types of carbohydrates?

• Glucose, Sucrose, Fructose

• Starch, Glycogen, Cellulose

• Amino acids, Fatty acids, Glycerol

• Monosaccharides, Disaccharides, Polysaccharides

What is the storage unit for surplus glucose in plants?

• Starch

• Sucrose

• Cellulose

• Glycogen

What is the repeating unit in proteins?

• Glucose

• Fatty acids

• Glycerol

• Amino acids

How many different amino acids make up proteins?

• 100

• 50

• 20

• 10

What happens to enzymes above certain temperatures?

• They become more active

• They denature

• They dissolve

• They multiply

What are triglycerides made of?

• Two glycerol molecules and four fatty acid tails

• One glycerol molecule and two fatty acid tails

• Three glycerol molecules and one fatty acid tail

• One glycerol molecule and three fatty acid tails

What is the function of proteins in cell membranes?

• Act as a storage unit for glucose

• Store energy

• Control the movement of substances

• Provide structural support

What test is used to identify the presence of starch?

• Benedict's solution

• Biuret test

• Litmus test

• Iodine solution