DNA Replication Nucleus Diagram Scientific Infographic

Biological diagram infographic titled "DNA Replication" centered on a clean labeled pathway-style molecular diagram of a replication fork inside the nucleus context, designed for university undergraduate learning. Show a large central DNA double helix opening into a Y-shaped replication fork, with input → output logic from parental DNA to two daughter DNA molecules, and subtle nucleus context cues in the background without distracting from the molecular process. Render 7 labeled components arranged evenly around the central diagram with thin leader lines; each label must contain a short heading in English and a one-line function description in English. Use biologically accurate molecular naming and proportions.

Include these exact on-image labels and captions:
1. "Parental DNA" — "Original double helix that serves as the template for copying."
2. "Helicase" — "Unwinds the DNA strands by breaking hydrogen bonds at the fork."
3. "Primase" — "Synthesizes short RNA primers to start DNA synthesis."
4. "DNA Polymerase" — "Adds complementary nucleotides in the 5' to 3' direction."
5. "Leading Strand" — "Synthesized continuously toward the replication fork."
6. "Lagging Strand" — "Synthesized discontinuously as short Okazaki fragments."
7. "DNA Ligase" — "Seals gaps between Okazaki fragments to complete the strand."

Visually indicate strand polarity with small clear 5' and 3' markers, complementary base pairing, RNA primer segments, and directional synthesis arrows. Show the leading strand as continuous synthesis and the lagging strand as segmented synthesis, with daughter DNA duplexes emerging from the process. Composition should prioritize a clean central scientific diagram with sharp readable typography, balanced negative space, and precise leader lines.

Visual style: medical illustration (Netter-style), editorial scientific plate, monochrome scientific palette using graphite, charcoal, slate gray, soft silver, and subtle blue-gray accents; calm academic mood, high clarity, refined shading, crisp contours. medical-textbook clarity, editorial scientific illustration, vector-clean lines, no photographic textures. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no graphic gore, no real patient photos, no watermarks No graphic medical gore, no real patient photographs, no surgical blood. For human anatomy, keep illustrations educationally tasteful. For animal anatomy, no cruelty imagery. Scientifically accurate labeling and proportions.