Biology 0610 · IGCSE · Biological molecules

Biological molecules — practice question

Which row shows the chemical elements present in proteins?

  • Acarbon: present; hydrogen: present; oxygen: present; nitrogen: present
  • Bcarbon: present; hydrogen: absent; oxygen: present; nitrogen: absent
  • Ccarbon: absent; hydrogen: present; oxygen: present; nitrogen: present
  • Dcarbon: present; hydrogen: present; oxygen: absent; nitrogen: absent

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