Match the definition with the name of the growth phase in...

Match the definition with the name of the growth phase in the growth curve. ___Number of dying cells is higher than the number of cells dividing ___Number of new cells equal to number of dying cells ___New enzymes to use available nutrients are induced ___Binary fission is occurring at maximum rate A. Lag phase B. Log phase C. Stationary phase D. Death phase

Match the definition with the name of the growth phase in the growth curve.
___Number of dying cells is higher than the number of cells dividing
___Number of new cells equal to number of dying cells
___New enzymes to use available nutrients are induced
___Binary fission is occurring at maximum rate
A. Lag phase
B. Log phase
C. Stationary phase
D. Death phase

Key Concepts

Lag phase

The lag phase is the period in the microbial growth curve where cells are adapting to a new environment and preparing for growth. During this phase, there is no immediate cell division, but there is active synthesis of enzymes and other molecules that will be needed once the cells begin to multiply.

Log phase

The log phase, also known as the exponential phase, is characterized by rapid cell division where the population increases exponentially. During this phase, conditions are optimal for growth, and the rate of cell division is at its maximum.

Stationary phase

The stationary phase is reached when the rate of cell division equals the rate of cell death, resulting in a stable population size. In this phase, resources become limiting, and waste products accumulate, which slows down further growth.

Death phase

The death phase is the period in the microbial growth curve where the number of dying cells exceeds the number of new cells being formed. This decline in the population occurs due to the depletion of nutrients, accumulation of toxic wastes, or other adverse environmental conditions.

Transcript

00:01 Hey, everybody.

00:01 Today we're talking about growth phase labeling.

00:04 So i wrote reword here because i think it is important to reword your questions and write them down because it will help you.

00:12 Actually take it to the next level of understanding and be able to actually know what you're talking about rather than just reading it and going, oh my gosh, this is confusing.

00:25 It is stressful.

00:27 So now that we have this.

00:30 I would write down whatever you would.

00:33 The little up symbol means up, division, division.

00:37 And we're going to do some labeling to figure out which definition goes to what.

00:50 Feel free to pause, write it down on your own, whatever you need to do.

00:55 Okay.

00:57 Now that we have this, let's kind of try to look at abc and d, which are the lag phase.

01:13 The log phase, the stationary phase, and the death phase.

01:23 So, a, lag, b, log, c, stationary, d, death, which actually is cut.

01:59 Okay, now that we have that written down, let's actually take it a step farther.

02:05 I want you to draw out a picture of law of the rhythmic, of like, bacterial living.

02:13 Cells and what's happening here.

02:15 So we're going to go take a different color or whatever.

02:19 Help yourself draw a little squares by you used to do.

02:23 And we're going to label the different phases.

02:25 Even without understanding what these things are, you can kind of figure out based on what the curve looks like, where things are going to be? so when are cells going to be dying over time? it's going to be over here.

02:40 Death towards the end where this is.

02:44 The higher is number of cells.

02:52 So just write number or something.

02:54 And then over here is time...

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