Inside of Alga Cells (image) University of California - Los Angeles Share Print E-Mail Caption Scientists looked inside the alga's cells. The cell nucleus is in purple, mitochondria in red, chloroplast in green and lipids in yellow. Credit Melissa Roth/HHMI and Andreas Walters/Berkeley Lab Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.