Question

which tube has the highest protein concentration? image of four test tubes labeled 1, 2, 3, 4 with different colored liquids at the bottom
tube 1: pepsin
tube 2: albumin
tube 3: starch
tube 4: water

Explanation:

To determine which tube has the highest protein concentration, we analyze each substance:

• Pepsin (Tube 1) is an enzyme (a type of protein), so it contains protein.
• Albumin (Tube 2) is a well - known protein, so it contains protein.
• Starch (Tube 3) is a carbohydrate, not a protein.
• Water (Tube 4) is a simple molecule and contains no protein.

Now, we compare the protein - containing tubes (Tube 1 and Tube 2). Albumin is a pure protein, while pepsin is an enzyme (also a protein, but in the context of these options, albumin is a more concentrated source of protein in this setup). So Tube 2 (Albumin) has the highest protein concentration.

Answer:

B. Tube 2: Albumin