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You are looking at Winter 2026. That term is over, so these are last term's numbers rather than seats you can take. dibs holds 1,472 sections for Winter 2026, read about 1 month ago. Separately, it has finished 195 of the 3,572 courses on its current checking list for this term. Future-term coverage is incomplete, so a course with nothing here may simply not have been reached yet. Back to Fall 2026

CHEM 153L

Biochemical Methods I

4 units

Sections & times

Lecture and lab.

Winter 2026: 1 lecture and 8 discussions. 1 lecture and 4 discussions are open. The oldest of these readings was about 1 month ago.

Grades

3.15

Average grade awarded in CHEM 153L. Not a student rating: this is what the grades were.

In the A range

50%

of the 1,521 letter grades

D, F or W

8.2%

of every letter grade awarded, plus withdrawals

Taken pass/no pass

1%

5 of 13 students passed

The registrar's own records: 1,521 grades over 14 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.

What is inside that record

1 of those terms is a summer session, and summer sessions are counted here.

The table below splits them, and term averages across those 14 terms ran 2.83 to 3.32.

Historical grades for HONG-HERMESDORF, ANNE, across recorded terms. The course summary above includes all professors.

  • A+ 4 · 0.3%
  • A 521 · 34.8%
  • A- 231 · 15.4%
  • B+ 138 · 9.2%
  • B 190 · 12.7%
  • B- 101 · 6.7%
  • C+ 71 · 4.7%
  • C 79 · 5.3%
  • C- 42 · 2.8%
  • D+ 9 · 0.6%
  • D 68 · 4.5%
  • F 44 · 2.9%
  • P 4 of 1,517
  • NP 8 of 1,517
  • U 1 of 1,517
  • I 6 of 1,517

Percentages are of the 1,498 letter grades. Grey bars are non-letter outcomes: passes (P), no-passes (NP), unsatisfactory (U), and incompletes (I).

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

Predicted GPA, raw average, sample size, terms, A range and the workload reviewers reported for every instructor with a grade record in this course
Instructor Predicted GPA Raw n Terms A range Workload Winter 2026
HONG-HERMESDORF, ANNE reviews ↗ 3.15 3.15 1,498 13 50% heavy Open, 5 seats left
LANNAN, RYAN reviews ↗ 3.13 3.12 23 1 48% - 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.

Reviews for CHEM 153L

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.

Read the source reviews

What comes first

The chain dibs can see is 3 courses long before CHEM 153L. Read from Fall 2026, because dibs has not read a class page for CHEM 153L in Winter 2026 and a department can change what it requires. This is a floor, not a deadline: dibs has not read a class page for CHEM 20B and CHEM 20L, so the real chain can only be longer than this, never shorter.

Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.

In Winters

Ran in 4 of the last 4 Winters.

From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.

From the registrar's catalog

Lecture, two hours; laboratory, four hours. Requisites: courses 14BL or 20L and 30AL, and 153A or 153AH (may be taken concurrently), with grades of C- or better. Integrated term-long project involving biofuel production in bacteria. Purification of key enzyme for alcohol production from bacteria via affinity chromatography. Assessment of protein amount, purity, and activity of enzyme. Techniques include protein determination by Bradford assay, polyacrylamide gel electrophoresis, immunoblotting, and enzyme activity assays to determine enzyme activity (Km, Vmax, inhibitor studies). P/NP or letter grading.

Sections in Winter 2026

You enroll in the discussion, not the lecture, so a discussion's status is the one that decides whether you get in. A lecture can read open while every discussion under it is full.

Seat counts as of : the oldest of these 11 readings. That term is over, so nothing has moved since.

Final enrollment, averaged across each term's sections: between 80 and 145 a term over 13 terms, summer excluded, most recently 116 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 153L was like: the work, the teaching, and what students wish they’d known.

Write a review

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.

Read reviews on BruinWalk

Community guidelines

Seats over time in Winter 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.

Lec 1 · Hong-Hermesdorf, A and Zavala, R. · 123 of 144 enrolled

Unchanged over less than a minute

123 of 144 · 5 left in its discussions

Both readings say 123 of 144.

27 Aug 03:0527 Aug 03:05
1 hour plotted. dibs read it.123 of 144 enrolled at the newest reading, about 1 month ago, with 5 left in its discussions. Seats from 27 Aug 03:05 to 27 Aug 03:05, 123 to 123. The line is flat across the whole window: recorded enrollment counts match. Changes between reads may be missed. Every hour plotted carries a read, so a count that did not move here was checked and did not move.
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.