krebs cycle

n=4


a: The krebs cycle ~
b: an 8-cylinder car engine

What:

"To understand the Krebs Cycle, visualize a circle with eight points. The Krebs Cycle is like an 8-cylinder car engine. Each of those eight points is a chemical, an organic acid, which is essential to the creation of energy. Those eight organic acids are citrate, cis-aconitate, isocitrate, alpha-ketoglutarate, succinate, fumarate, malate, and oxaloacetate."... see the rest in the link....


Useful?
Writer: David Gersten, M.D.
LCC:
Where:
Date: Dec 27 2013 11:25 AM


A Molecular Mill

a: The krebs cycle ~
b: a mill

What:

"The Krebs cycle is like a "mill" where the "grain" (the substrate) is the acetyl group of acetyl-CoA and the "flour" (products) are CO2 and electrons (NADH and FADH2), the "millstone" are the enzymes and intermediate compounds."


Useful?
Writer: worldofbiochemistry
LCC:
Where:
Date: Dec 27 2013 11:28 AM


The Downside Of Teaching Analogies

a: The krebs cycle ~
b: a merry-go-round

What:

"the Krebs Cycle is like a merry-go-round in which two kids get on and two kids get off at every turn."
But
"The downside, however, is twofold. The first problem is that it's easy at times to think that the model is the reality. The goofier the metaphor, the easier it is to avoid this pitfall; I've never had a student yet who thought that the Krebs Cycle really was a merry-go-round (although I did have a student of mine start her essay on antibodies on the AP exam, "So, antibodies are trash tags..."). But with sophisticated, complex models, it's tempting to think that the model is, down to the level of details, what is happening in the real world."


Useful?
Writer: Gordon Bonnet
LCC:
Where:
Date: Dec 27 2013 11:33 AM


Energy~money~time?

a: The krebs cycle ~
b: processing loop

What: "The Krebs cycle is like a processing loop that transforms the value of a share of IBM stock into physical cash coming out of an ATM. The share of IBM stock begins as set of bits stored somewhere in cyberspacetime on the computers run by your online stockbroker. When you sell the share of stock, the bits storing the share of stock are debited from your account and some bits over in the IBM portion of cyberspacetime are deleted too. The resulting cash value is credited to the money market bits of your online stockbroker account. From there the cash value bits can be transferred to your local bank, and ultimately, you can punch in some numbers into an ATM and out pops some physical cash that can be used to buy a cup of coffee. In this example, the share of IBM stock is like an energy rich carbohydrate molecule and the cash popping out of the ATM is like a molecule called ATP, which is the biochemical energy equivalent of cash. In a capitalistic economic system, money is the equivalent of energy in a biochemical sense, since, as everybody knows, it makes the world go round. There is an old joke in thermodynamics that energy is the ability to do work, while money is the ability not to do work."

Useful?
Writer: Steve Johnston
LCC:
Where:
Date: Dec 27 2013 11:39 AM



Green Venn Diagram

METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.