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CHEM 153C · Lec 1

Biochemistry: Biosynthetic and Energy Metabolism and Its Regulation

Fall 2026Koehler, C.M.4 units

Seats, time, final and grades

Seats

Open, 55 seats left.

65 of 120 enrolled, lecture and all discussions summed.

Meets

MWF 1:00pm-1:50pm

Lecture only. You also attend a discussion, listed below.

Final

Wed 9 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 22 hours ago.

Grades

3.30
predicted, this instructor · 194 grades

194 letter grades, Koehler, C.M..

Read 42 minutes ago. This is a recent reading, not a live seat count.

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Before you can enroll

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From the registrar limited until second pass

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. Enrollment is limited to departmental majors on the priority and first enrollment passes. Any student may enroll on the second pass, space permitting.

This limit ends at an enrollment pass rather than on a date, and dibs does not hold the date second pass opens for Fall 2026, so it cannot say whether that pass has come. When it does, the registrar writes who may enroll then as “Any student may enroll on the second pass, space permitting.” So dibs cannot tell whether this class is open to you today, and it is not counting it as one you can take: your enrollment appointment on MyUCLA is what settles it.

Restrictions read 22 hours ago.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

4 discussions, all open.

  • Dis 1A

    T 2:00pm-2:50pm

    Zha, J.

    Open, 6 seats left.

  • Dis 1B

    W 10:00am-10:50am

    Knopp, H.

    Open, 12 seats left.

  • Dis 1C

    R 11:00am-11:50am

    Howe, R.S.

    Open, 21 seats left.

  • Dis 1D

    R 3:00pm-3:50pm

    Howe, R.S.

    Open, 16 seats left.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 1:00pm-1:50pm

Discussions: T 2:00pm-2:50pm · W 10:00am-10:50am · R 11:00am-11:50am · R 3:00pm-3:50pm

Young Hall CS24

Grades

3.30
predicted, this instructor · 194 grades

Of the 4 other people in the grade record for CHEM 153C, the 2 with the most grades: SCHMITT, DANIELLE L at 3.48 over 319 grades and CLARKE, CATHERINE FREITAG at 3.30 over 303 grades.

A range
53%
P/NP
1%
D/F/W
4.1%

Full grade history for CHEM 153C

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.

Workload, average. 2.8 of 5 for Carla Koehler, where 5 is lightest. Read 30 days ago.

What the work looks like

  • Exams mentioned, no number given, said by 6 reviewers
  • Quizzes mentioned, no number given, said by 3 reviewers
  • Papers mentioned, no number given, said by 1 reviewer
  • Problem sets mentioned, no number given, said by 3 reviewers
  • Projects mentioned, no number given, said by 2 reviewers

Read from 108 reviews 26 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

CHEM 153C reviews for Carla Koehler Reviews for all professors of CHEM 153C

Will it still be here

medium risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 7621F
  • 8722W
  • 3322S
  • 9822F
  • 5323W
  • 10323S
  • 5323F
  • 13824W
  • 9924S
  • 17525W
  • 12025S
  • 5725F
Enrollment by term: 21F 76, 22W 87, 22S 33, 22F 98, 23W 53, 23S 103, 23F 53, 24W 138, 24S 99, 25W 175, 25S 120, 25F 57

Peak 175 · most recent 25F at 57

Seats over time

Freed 12 seats over about 2 months

65 of 120 · 55 left in its discussions
17 Aug 15:079 Sep 05:041 Oct 19:02
dibs read 168 of the 512 hours its hourly record covers, 33%, and did not look in 344. dibs had no hourly record before 10 Sep, which is the other 573 of 1085 plotted.65 of 120 enrolled at the newest reading, 42 minutes ago, with 55 left in its discussions. Seats from 17 Aug 15:07 to 1 Oct 19:02, 77 to 65. dibs read 168 of the 512 hours its hourly record here covers, 33%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 344 hours dibs was keeping a record and did not reach this section. Nothing before 10 September at 12:00, where this section's record starts, has a read either way, which is 573 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not: 42 minutes ago.

Show the readings (35)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 19:02 65 120 open 0 of 4 7 of 20
1 Oct 00:22 65 120 open 0 of 4 2 of 5
30 Sep 20:52 66 120 open 0 of 4 3 of 7
30 Sep 14:42 67 120 open 0 of 4 2 of 4
30 Sep 11:12 66 120 open 0 of 4 3 of 8
30 Sep 04:12 67 120 open 0 of 4 2 of 5
30 Sep 00:02 68 120 open 0 of 4 2 of 5
29 Sep 20:32 67 120 open 0 of 4 10 of 30
28 Sep 15:02 68 120 open 0 of 4 5 of 15
28 Sep 01:02 70 120 open 0 of 4 8 of 25
27 Sep 01:12 69 120 open 0 of 4 8 of 25
26 Sep 01:12 70 120 open 0 of 4 10 of 32
24 Sep 18:12 69 120 open 0 of 4 2 of 5
24 Sep 14:42 70 120 open 0 of 4 9 of 29
23 Sep 10:22 69 120 open 0 of 4 3 of 8
23 Sep 03:52 68 120 open 0 of 4 4 of 11
22 Sep 17:52 69 120 open 0 of 4 6 of 17
22 Sep 01:12 68 120 open 0 of 4 15 of 46
20 Sep 04:12 67 120 open 0 of 4 3 of 8
19 Sep 21:22 68 120 open 0 of 4 2 of 4
19 Sep 18:02 67 120 open 0 of 4 10 of 27
18 Sep 16:12 68 120 open 0 of 4 14 of 43
16 Sep 22:32 69 120 open 0 of 4 4 of 10
16 Sep 13:02 70 120 open 0 of 4 6 of 16
15 Sep 22:32 71 120 open 0 of 4 4 of 8
15 Sep 15:02 72 120 open 0 of 4 2 of 5
15 Sep 11:32 71 120 open 0 of 4 3 of 8
15 Sep 04:32 76 120 open 0 of 4 46 of 120, 7 no hourly record
10 Sep 05:40 77 120 open 0 of 4 no hourly record
5 Sep 02:40 76 120 open 0 of 4 no hourly record
4 Sep 01:40 75 120 open 1 of 4 no hourly record
3 Sep 01:40 76 120 open 1 of 4 no hourly record
2 Sep 01:40 75 120 open 1 of 4 no hourly record
21 Aug 03:40 76 120 open 1 of 4 no hourly record
17 Aug 15:07 77 120 open 1 of 4 -
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.

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