Organisms that do not carry out aerobic cellular...

Organisms that do not carry out aerobic cellular respiration: Select one: a. Must be strict anaerobes. b. May carry out fermentation, substituting a molecule other than O2 as the terminal electron chain. c. May use fermentation to generate ATP, with alcohol released as a byproduct. d. Can break down lactate to generate ATP via the electron transport chain.

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Transcript

00:01 Hi there.

00:02 This is biology instructor nicole with the question about organisms that do not carry out aerobic cellular respiration.

00:13 And we're to select the one statement that is true about these organisms.

00:20 A, they must be strict anaerobes, anerobe, being the opposite of aerobic cellular respiration.

00:29 B, may carry out fermentation.

00:32 Substituting a molecule other than o2 as the terminal electron chain.

00:39 C may use fermentation to generate atp with alcohol released as a byproduct.

00:46 D can break down lactate to generate atp via the electron transport chain.

00:52 So this question has several distractors, which have partly true statements, but not completely true.

00:59 So let's take a look.

01:01 Strict anerobes would indicate, excuse me, i don't want to erase that, that's underline, strict anerobes do not use oxygen, do not do cellular respiration.

01:20 So if they do not use o2, there's no respiration.

01:32 So this so far fits the statement.

01:36 We're talking about organisms that do not carry out cellular respiration.

01:40 So then what do they do? well, they do think new fermentation.

01:46 So you may think b is a good choice.

01:49 However, there is no terminal, there's no electron transport chain in fermentation.

01:57 So let's make a note of that here...

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