BIO Lab Introduction to Food Macromolecules Quiz

Question 1: Tracy: Macromolecules are large molecules. 'Macro' means large, and 'molecules' refers to atoms held together by chemical bonds.

Which of the following molecules is NOT a macromolecule?

a. Glucose

b. Carbohydrates

c. Lipid

d. Protein

a. Glucose

Question 2: Some macromolecules are polymers. What is a polymer?

a. A long molecule that consists of repeating units

b. A solution that consists of many molecules

c. A group of elements in matter

d. Small molecules that act as building blocks

a. A long molecule that consists of repeating units

Question 3: Two sugar molecules together make __________.

a. Monosaccharide

b. Disaccharide

c. Polysaccharide

b. Disaccharide

Question 4: Carbohydrates are an essential part of a diet because they provide ___________to the body.

a. Energy

b. Muscle

c. Fat

a. Energy

Question 5: Proteins are made up of ___________.

a. Amino acids

b. Muscle

c. Nucleotide

d. Simple sugar

a. Amino acids

Question 6: Polypeptides are made up of multiple amino acids connected by ___________.

a. nucleotides

b. peptide bonds

c. hydrogen bonds

d. nitrogen bonds

b. peptide bonds

Question 7: What are the functions of the lipids?

The main functions of lipids are energy storage, mobilization, and utilization. Other functions of lipids are synthesis of prostaglandin and cytokine, cell dierentiation and growth, cell membrane structure, signal transmission, hormone synthesis, and bile acid synthesis.

Question 8: Benedict's reagent detects the presence of simple sugars in food. What color indicates the presence of a high level of simple sugars?

a. Red

b. Green

c. Yellow

d. Blue

a. Red

Question 9: Which type of molecule are lipids mostly made of?

a. Water molecules

b. Polar molecules

c. Non-polar molecules

d. Protein molecules

c. Non-polar molecules

Question 10: Amino acids are linked by a specific type of covalent bond. The reaction producing this bond also produces one water molecule. What type of bond links amino acids together in a chain?

a. Peptide bonds

b. Hydrogen bonds

c. Ionic bonds

d. Metallic bonds

a. Peptide bonds

Question 11: A sequence of amino acids, or a polypeptide, grows from the N-terminus to the C-terminus. The linear sequence of amino acids within a protein is considered the ... structure of the protein.

a. Primary

b. Secondary

c. Tertiary

d. Quarternary

a. Primary

Question 12: Which level of protein structure is formed by the weak bonds between oxygen and hydrogen atoms within the polypeptide backbone?

a. Secondary structure

b. Primary structure

c. Tertiary structure

d. Quarternary structure

a. Secondary structure

Question 13: Which of the following is a secondary protein structure?

a. Gamma chain

b. Alpha-helix

c. Beta-wall

d. Epsilon turn

b. Alpha-helix

Question 14: Biuret's reagent detects the presence of proteins in food. What color indicates the presence of proteins?

a. Red

b. Violet

c. Blue

d. Yellow

b. Violet

Question 15: Which macromolecule is formed in all types of living cells and is made of amino acids linked with peptide bonds?

a. Carbohydrate

b. Protein

c. Nucleic acid

d. Lipid

b. Protein

Question 16: Which of these samples does NOT contain any of the four major macromolecules?

a. Apple

b. Water

c. Vegetable oil

d. Beef

b. Water

Question 17: What do you call a sample, for which no response is expected?

a. Negative control

b. Standard

c. Positive control

d. Test sample

a. Negative control

Question 18: A positive control is a sample known to give positive results for the given test. What is the purpose of a positive control?

a. Verify that the negative results are valid

b. Give positive results even when the procedure is not optimized

c. Always give negative results

d. Validate false-positive results

a. Verify that the negative results are valid

Question 19: From our experimental results, which food contains carbohydrates, proteins, and fats?

a. Milk

b. Bread

c. Water

d. Egg

a. Milk

Question 20: What forms after the glycosidic linkage reaction between glucose and galactose is complete?

a. Water and lactose

b. Lactose

c. Mannose

d. Water and fructose

a. Water and lactose

Question 21: Which of the following is a carbohydrate? Click the VIEW IMAGE button to display the image in the LabPad, and answer the question.

a. Sucrose

b. DNA

c. Insulin

d. Wax

a. Sucrose

Question 22:Nutrition facts labels tell you the amount of macromolecules in the food. What does insoluble fiber refer to? Remember you can click the VIEW IMAGE button to get more information.

a. Cellulose

b. Starch

c. Amylopectin

d. Amylose

a. Cellulose