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What is the difference between a linear and a cyclic metabolic pathway?

Answer 1

The energy molecules counts called NADH and FADH2

As far as i know, linear metabolic means glycolisis as cyclic means Kreb's so i am going to use it with my definition

Well the difference let's see

Glycolisis (aerobic situation)

Input: glucose
Output: pyruvate

You could not transform pyruvate to glucose again that is why it is linear. There is 2 phases called..give-electron and take-electron(my languange) and in this phase you have 2 NADH and 2 ATP..

Glycolisis (ANaerobic situation)

Input: glucose
Output: Lactic acid

You could transform lactic acid to glucose again via hepatic pathways(outside the cell). But it is still called linear.

Kreb's cycle has to be aerobic because the concentration gradient of NADH and FADH2 should be normal otherwise the reaction will not be completed

Input: pyruvate being transform to Acetyl-Coa
Output: the same

Some fat molecules or protein molecules could be made into energy by this only pathway.

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Answer 2
Isabella Anderson
Linear pathways have a straightforward sequence, while cyclic pathways form closed loops.
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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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