Question

You are given four test tubes containing purified biological macromolecules. The test tubes are unlabeled except for a number between 1 and 4. You are told that one test tube contains a protein, one contains a lipid, one contains a carbohydrate, and one contains a nucleic acid. You then perform some tests on the macromolecules and collect the following information:
A. Test tubes 2 and 4 contain nitrogen, but the other tubes do not.
B. The contents of test tube 3 are not soluble in water, but the contents of the other test tubes are soluble in water.
C. The contents of test tube 1 can be broken down into subunits that are all exactly identical to each other.
D. The macromolecule in test tube 2 is found to have a globular shape. What are the identities of the macromolecules present in the four test tubes?

Answer 1

Answer:

Test tube 1 carbohydrates

Test tube 2 protein

Test tube 3 lipids

Test tube 4 nucleic aci

Explanation:

nitrogen can be found in both

Test tubes 2 and 4 indicating possibilities of proteins and nuciec acids

Test tube 3 should contain lipids due to its non-water solubility properties.

carbohydrates (made out of sugar units) should be the constituents of test tube 3 considering other test tube analysis

Globular shape can be seen in test tube 2, then it will be protein when considered with molecular level due to linear structure of DNA

Can individual nucleic acid have globular shape or not. The answer is no

Our conclusion;

Test tube 1 carbohydrates

Test tube 2 protein

Test tube 3 lipids

Test tube 4 nucleic acid