**Core Concept:** Protein synthesis is a crucial process in cells that involves the formation of new proteins from amino acid chains. Antibiotics can target this process to inhibit bacterial growth or cause cell death. The three main stages of protein synthesis are transcription, translation, and post-translational modifications.

**Why the Correct Answer is Right:** Streptomycin is a bacteriostatic antibiotic that works by inhibiting the translation stage of protein synthesis. It binds to the 16S ribosomal RNA (rRNA) subunit of the bacterial ribosome, preventing the attachment of aminoacyl-tRNA to the growing polypeptide chain. This leads to a halt in protein synthesis and ultimately, bacterial cell death.

**Why Each Wrong Option is Incorrect:**

A. Chloramphenicol: This antibiotic inhibits the last stage of protein synthesis, known as post-translational modifications. Chloramphenicol binds to the 50S ribosomal subunit, preventing the formation of the 50S-50S complex, which is essential for the activation of peptidyl-tRNA. This inhibits the elongation step of translation.

B. Penicillin: This antibiotic is a beta-lactamase inhibitor, which prevents bacterial beta-lactamase enzymes from breaking down beta-lactam antibiotics like penicillin. It does not directly interfere with protein synthesis.

C. Aspirin: Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that targets the cyclooxygenase enzyme (COX), specifically COX-1 and COX-2. It does not inhibit protein synthesis.

**Clinical Pearl:** Understanding the mechanism of action of antibiotics can help in predicting their spectrum of activity, resistance patterns, and potential side effects. Knowledge of antibiotic targets is essential for rational drug use and patient management.