Trace how DNA, RNA, and gene switches control information flow from sequence to protein
5 sections · 6 lessons
Define the structural features of DNA and RNA and classify mRNA, tRNA, and rRNA by their molecular roles. Compare how RNA lesions affect translation initiation, elongation, and accuracy.
1 lessonTrace transcription and translation across DNA, RNA, and protein representations, and diagnose how sequence changes propagate into amino-acid changes.
1 lessonExamine the replication fork machinery, then apply a fidelity framework for DNA polymerase selection, induced fit, and proofreading to predict mutation patterns.
2 lessonsDiagnose lac operon expression states from environmental inputs and mutations, and justify each switch state through molecular interactions.
1 lessonClassify mRNA, tRNA, and rRNA by structural signatures and predict how lesions alter translation behavior.
1 lessonDNA and RNA differ in structure, and those differences shape how cells store, copy, and use genetic information. This course builds a working model of transcription, translation, replication, polymerase fidelity, and gene regulation, so you can reason through how sequence changes and molecular defects alter biological output. It is designed for learners who want a clear, mechanism-first view of molecular biology.
The course covers DNA and RNA structure, the central dogma, replication fork mechanics, DNA polymerase fidelity, the lac operon, and the distinct roles of mRNA, tRNA, and rRNA. It also covers how mutations and molecular interactions change gene expression, nucleotide selection, and translation behavior.
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Three findings from decades of learning research shaped how every Fenzo lesson is built.
Average pass rate · Freeman et al., PNAS 2014
What the science says
Students in lecture-only classes are 1.5× more likely to fail.
How Fenzo does it
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You work through itAI does it for you
Skill retention over time · with vs. without practice
What the science says
Offloading thinking to AI erodes the very skills you’re trying to build.
How Fenzo does it
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Retrieval practiceRe-reading
Long-term recall · retrieval vs. re-reading
What the science says
Recalling information beats re-reading it for building durable understanding.
How Fenzo does it
Lessons weave in quizzes and recall prompts, so it sticks.