Question

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Question
Within individual organisms, food moves through a series of chemical reactions in which it is broken down and rearranged to form new molecules, support growth, or release energy. Carbon, hydrogen, and oxygen from sugar molecules may combine with other elements to form amino acids and other large organic molecules.

This is a molecule of glucose (C6H12O6).



Compare and contrast the glucose molecule with that of threonine (C4H9NO3), an amino acid.



Drag and drop each statement according to what is similar about the two molecules and what is different.

Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
SIMILARITIES DIFFERENCES

Answer 1

SIMILARITIES
- Both are organic molecules composed mainly of carbon, hydrogen and oxygen.
- Both contain hydroxyl (–OH) groups.
- Both are small biomolecules (monomers) used in cellular metabolism and can be broken down to release energy.
- Both form covalent bonds and are found in living organisms.

DIFFERENCES
- Threonine contains nitrogen (an –NH2 amino group); glucose does not.
- Threonine is an amino acid (has amino and carboxyl groups and forms peptide bonds); glucose is a monosaccharide/sugar (has an aldehyde and multiple –OH groups and forms glycosidic bonds).
- Chemical formulas differ: glucose C6H12O6; threonine C4H9NO3.
- Threonine is typically a zwitterion at physiological pH; glucose is not.
- Glucose’s primary role is energy/short‑term storage and carbohydrate structure; threonine’s primary role is as a building block of proteins and in nitrogen‑containing metabolism.