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Its (A) but i can’t explain it!

its A

Explanation:

because we check amino acids, in the first structure of proteins.

On higher structures , for example secondary we check amino acids conformation and arrangement of polypeptide chains.

that mutation may just change one aminoacid thaf doesnt effect the secondary arrangement.

yes i have all the correct answers

1. c 6. b. 11. c

2. a 7. d. 12. d

3. c 8. b. 13. c

4. d 9. c. 14. d

5. c 10. d. 15. a

16. d. 21. a

17. d.

18. a. 22-30 you must do on

19. d. your own

20. d.