Cell and Molecular Biology

University of California, Santa Cruz

BIOL 20A at UCSC: average GPA 2.53 across 6,777 students. Grade distribution by term. Introduction to biochemistry, cell biology, molecular biology, and…

Average GPA: 2.53

Grade distribution records: 6,777 students across 24 terms.

Enrollment requirements

Prerequisite(s): CHEM 1A, CHEM 3A, or CHEM 4A. First pass enrollment restricted to proposed majors in the following: Biology BA, Biology BS, MCD Biology BS, Neuroscience BS, Ecology and Evolutionary Biology BS, Marine Biology BS, Plant Sciences BS, EEB/ENVS combined BA, Global and Community Health BS, Biochemistry and Molecular Biology BS, Microbiology BS, Science Education BS, Biomolecular Engineering BS, or Biotechnology BA.

2026–2027 · UCSC catalog

Grade distribution

Grade	Students	Percent
A+	189	2.8%
A	925	13.6%
A-	287	4.2%
B+	396	5.8%
B	1,142	16.9%
B-	361	5.3%
C+	689	10.2%
C	1,105	16.3%
C-	321	4.7%
D+	107	1.6%
D	347	5.1%
D-	36	0.5%
F	439	6.5%
P	68	1.0%
NP	210	3.1%
W	153	2.3%

Based on 6,777 student grade records across 24 terms and 4 professors.

Instructors

• John W Tamkun 2,984 students, Average GPA 2.42
• Melissa S Jurica 1,916 students, Average GPA 2.61
• Guido Bordignon 1,433 students, Average GPA 2.70
• Jeremy C Lee 444 students, Average GPA 2.45