some proteins build cells and ____?

0 ⤊

some proteins build cells and ____?

cAN U FILL IN THE BLANK?

2007-01-29 11:31:45 · 1 answers · asked by Buddy 2 in Science & Mathematics ➔ Biology

1 answers

Not clear. Do we have choices?

1. Proteins build parts of living things like hair, fingernails, horns, ...
2. Proteins carry oxygen in the blood.
3. Proteins compose the parts that contract muscles.
4. Proteins convey immunity.
5. Proteins may be enzymes that catalyze reactions.

2007-01-29 11:36:37 · answer #1 · answered by ecolink 7 · 0⤊ 0⤋