CHEM CM255
Mitochondria in Medicine, Biology, and Chemistry
Seminar.
Fall 2026: 1 section. Nothing here is open. The oldest of these readings was 2 hours ago.
Also listed as BIOL CH M255 (closed by the department): the same class, and each department holds its own seats and its own grade history.
Grades
Graded S/U, so there is no average to report.
Graded S/U: 33 records over 3 terms.
In the A range
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no letter grades in the record to count
D, F or W
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no letter grades in the record to count
Taken pass/no pass
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this course is graded S/U, not pass/no pass
The registrar's own records: Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
No summer session is in that record.
The table below splits them.
Historical grades for KOEHLER, CARLA MARIE, across recorded terms. The course summary above includes all professors.
- S 33 of 33
Counts are out of 33 recorded outcomes. These are non-letter grades and do not have a GPA.
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Fall 2026 |
|---|---|---|---|---|---|---|---|
| KOEHLER, CARLA MARIE reviews ↗ | S/U | 33 S/U | 3 | - | - | Closed | |
| BERTHOLET, AMBRE MARGUERITE SOLANGE reviews ↗ | S/U | 22 S/U | 2 | - | - | not teaching it | |
| SHIRIHAI, ORIAN reviews ↗ | S/U | 22 S/U | 2 | - | - | not teaching it | |
| VAN DER BLIEK, ALEXANDER M reviews ↗ | S/U | 22 S/U | 2 | - | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.
dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.
From the registrar's catalog
(Same as Biological Chemistry M255.) Seminar, two hours every other week. Open to undergraduate and graduate science majors considering or currently conducting research in areas related to mitochondria. Large number of physiological and pathophysiological processes involve mitochondrial function and dysfunction. Focus on understanding how mitochondria metabolism, form, and function impact health and disease. Physiology and cell biology of healthy and dysfunctional mitochondria critically assessed at subcellular, cellular, tissue, and organismal levels. Topics include in-depth analyses of literature and critical evaluation of experimental design and methods of current research. May be repeated for credit. Concurrently scheduled with course C155. S/U grading.
Sections in Fall 2026
Seat counts as of . Seat readings are snapshots, not live availability. Their timestamps show when dibs last checked.
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Sem 1 T 4:00pm-4:50pmClosedno grade history
15 of 15 enrolled high risk
Final enrollment, averaged across each term's sections: 11 a term over 3 terms, summer excluded, most recently 11 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking CHEM CM255 was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Fall 2026
How each lecture has filled since dibs first saw it.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Sem 1 · Koehler, C.M. · 15 of 15 enrolled
Nothing read since 1 Oct, 2 hours ago. Over about 1 month before that, filled by 15.
How readings and alerts work
A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.