Multiple choice

Retrograde signaling involves communication of

  1. nucleus to the chioroplast

  2. endoplasmic reticulum to the nucleus

  3. nucleus to the mitochondria

  4. chioroplast to the nucleus

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Retrograde signaling refers to the regulatory communication from organelles such as chloroplasts and mitochondria back to the nucleus to coordinate gene expression in response to cellular and environmental cues.