During aerobic respiration, electrons travel downhill in which sequence?
A) food --> Krebs cycle --> ATP -->NAD+
B) food --> NADH --> electron transport chain --> oxygen
C) glucose --> ATP --> oxygen
D) glucose --> ATP --> electron transport chain --> NADH
E) food --> glycolysis --> Krebs cycle --> NADH --> ATP

Question

13-09-2019
Biology

contestada

During aerobic respiration, electrons travel downhill in which sequence?
A) food --> Krebs cycle --> ATP -->NAD+
B) food --> NADH --> electron transport chain --> oxygen
C) glucose --> ATP --> oxygen
D) glucose --> ATP --> electron transport chain --> NADH
E) food --> glycolysis --> Krebs cycle --> NADH --> ATP

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Phoca Phoca · Answer 1 · 2019-09-19T12:29:43+02:00

Answer:

The correct answer will be option-B.

Explanation:

Cellular respiration is a slow process which produces energy from the oxidation of food components which could be glucose, fatty acids and proteins.

The process proceeds in four steps: glycolysis, link reaction, Krebs cycle and electron transport chain.

The energy molecules are produced when a high energy electron gets reduced and the released energy is stored in the form of energy molecules which could be ATP or energy equivalents like NADH and FADH₂.

These reducing equivalents donate its electrons during electron transport chain where the electrons flow to the last electron acceptor called oxygen.

Thus, Option-B is the correct answer.

priyankatutor priyankatutor · Answer 2 · 2021-10-16T08:23:24+02:00

Option B is correct. The correct order of electron travel downhill is

[tex]\rm \bold {Food\rightarrow NADH \rightarrow \texttt{Electron transport chain} \rightarrow Oxygen}[/tex]

Aerobic Respiration is the process by which food convert to energy.

It completes in few steps

The food digested and convert to Glucose.
Glucose broken down in Glycolysis to form pyruvate.
The third step is Krebs cycle where NADH is generated.
NADH is used in Electron transport chain to Form ATP.
In the last electron transferred to Oxygen.

So,option B is Correct. other sequences are incorrect.

Hence we can say that the correct order of electron Down hill is

[tex]\rm \bold {Food\rightarrow NADH \rightarrow \texttt{Electron transport chain} \rightarrow Oxygen}[/tex]

For more about aerobic respiration you ca refer to the link:

https://brainly.com/question/12605249?referrer=searchResults