Question

multiple choice question
several atoms joined together by chemical bonds form a(n) ______, such as deoxyribonucleic acid (dna).

○ tissue
○ organ
○ cell
○ molecule

Explanation:

• Tissue: Made of cells, not atoms bonded. Eliminate.
• Organ: Composed of tissues, not atom - bond structure. Eliminate.
• Cell: Basic life unit, has molecules but isn't formed by atoms bonding directly as per the question. Eliminate.
• Molecule: Defined as atoms joined by chemical bonds. DNA is a molecule. So this is correct.

Answer:

D. molecule