CHEM 153A · Lec 1
Biochemistry: Introduction to Structure, Enzymes, and Metabolism
Fall 2026 · Lannan, R. and Wilson, P. · 4 units
Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.
Open on the registrar (opens in a new tab)- Status
- Open
Tell dibs what you have already taken and this line will say which of these you have. Your list.
- Restrictions read 40 hours ago. Dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.
- Enrolled in lecture
- 287 of 319
- 90% full
- Read 53 minutes ago, and the registrar publishes once an hour, so this is current.
- Waitlist
- No waitlist
- Seat risk
- medium risk
From the registrar limited by standing
Any student attempting to save or sell a spot for another student is violating Student Conduct Code 102.23d and may be referred to the Office of the Dean of Students. Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m. Enrollment is limited to departmental majors on the priority and first enrollment passes. Any student may enroll on the second pass, space permitting. PTE numbers are NOT available; do not contact the instructor for a PTE number. There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on the following Fridays: October 23 and November 20, 2026.
The limit applies to the earlier enrollment pass. Dibs still counts this class as one you can take, because it opens up, but on first pass it may not be yours yet. This class is also New Transfers Only, which the pass does not lift.
Discussions: this is what you enroll in
Enrollment at UCLA acts on the discussion, not the lecture. The lecture's seat count above is the sum across all of them, so it can read open while every discussion you could actually join is full.
| Discussion | Status | Enrolled | Seats left | Meets | Where |
|---|---|---|---|---|---|
|
Dis 1A
|
Open | 21 of 26 | 5 | T 9:00am-9:50am | Boelter Hall 5419 |
|
Dis 1B
|
Closed | 27 of 27 | 0 | T 11:00am-11:50am | Boelter Hall 5440 |
|
Dis 1C
|
Open | 26 of 27 | 1 | T 3:00pm-3:50pm | Mathematical Sciences 5233 |
|
Dis 1D
|
Open | 26 of 27 | 1 | W 10:00am-10:50am | Boelter Hall 4413 |
|
Dis 1E
|
Open | 23 of 26 | 3 | W 12:00pm-12:50pm | Young Hall 1044 |
|
Dis 1F
|
Closed | 26 of 26 | 0 | W 1:00pm-1:50pm | Mathematical Sciences 5127 |
|
Dis 1G
|
Open | 17 of 26 | 9 | R 9:00am-9:50am | Franz Hall 2288 |
|
Dis 1H
|
Open | 22 of 27 | 5 | R 11:00am-11:50am | Mathematical Sciences 5203 |
|
Dis 1I
|
Closed | 26 of 26 | 0 | R 1:00pm-1:50pm | Young Hall 1044 |
|
Dis 1J
|
Open | 23 of 27 | 4 | F 9:00am-9:50am | Geology Building 4645 |
|
Dis 1K
|
Open | 27 of 28 | 1 | F 1:00pm-1:50pm | Geology Building 6704 |
|
Dis 1L
|
Open | 23 of 26 | 3 | F 3:00pm-3:50pm | Young Hall 1044 |
When it meets
Meets: MTWF 2:00pm-2:50pm
Discussions: T 9:00am-9:50am · T 3:00pm-3:50pm · W 10:00am-10:50am · W 12:00pm-12:50pm · R 9:00am-9:50am · R 11:00am-11:50am · F 9:00am-9:50am · F 1:00pm-1:50pm · F 3:00pm-3:50pm
Young Hall CS50
Predicted GPA
What students say
Dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.
Enrollment over time
A dot is a reading where something moved: the seat count, the status, or the waitlist. The last one is the most recent sweep, moved or not. The line holds flat between dots because that is what the readings say: it did not drift, it held and then jumped. The ticks along the bottom are the hours Dibs recorded reading this section, which is how a flat run says "checked, unchanged" rather than "nobody looked". It only keeps those from 25 August, so the ruler is shorter than the line for now. Both start when Dibs did rather than reaching back before it existed.
Filled by 27 over 11 days
Show the readings
| Recorded | Enrolled | Capacity | Status | Waitlist |
|---|---|---|---|---|
| 29 Aug 11:40 | 287 | 319 | open | - |
| 28 Aug 01:40 | 287 | 319 | open | - |
| 27 Aug 22:40 | 270 | 319 | open | - |
| 27 Aug 21:40 | 287 | 319 | open | - |
| 27 Aug 20:40 | 270 | 319 | open | - |
| 27 Aug 19:40 | 287 | 319 | open | - |
| 27 Aug 10:40 | 270 | 319 | open | - |
| 22 Aug 00:40 | 270 | 303 | open | - |
| 21 Aug 11:40 | 260 | 303 | open | - |
| 18 Aug 18:40 | 260 | 287 | open | - |
How big this course usually runs
Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.
- 27722W
- 25122S
- 18122F
- 28123W
- 31823S
- 22223F
- 35024W
- 35024S
- 20424F
- 29825W
- 33525S
Peak 350 · most recent 25S at 335