Question

What process must happen before this process depicted below?

Two pyruvate molecules are converted to two lactic acid molecules. Two NADH molecules are converted to two NAD+ molecules in the process.

A. Fermentation
B. Cellular respiration
C. Krebs cycle
D. Glycolysis

Answer 1

Two pyruvates are converted to two lactic acid molecules, which ionize to form lactate. In this process two NADH + H+ are converted to two NAD+. ... If enough oxygen is not present to undergo aerobic respiration, pyruvate will undergo lactic acid fermentation.

Answer 2

source: https://www.google.com/search?q=Two+pyruvate+molecules+are+converted+to+two+lactic+acid+molecules.+Two+NADH+molecules+are+converted+to+two+NAD%2B+molecules+in+the+process.&rlz=1CAQIMT_enUS940&oq=Two+pyruvate+molecules+are+converted+to+two+lactic+acid+molecules.+Two+NADH+molecules+are+converted+to+two+NAD%2B+molecules+in+the+process.&aqs=chrome..69i57.188j0j7&sourceid=chrome&ie=UTF-8&safe=active&ssui=on

Answer 3

ok, so what happens before this?

Answer 4

I suppose I am confused because I dont see how the text is talking about what happens before fermentation?

Answer 5

What step occurs before fermentation?
Fermentation starts with glycolysis, but it does not involve the latter two stages of aerobic cellular respiration (the Krebs cycle and oxidative phosphorylation). During glycolysis, two NAD+ electron carriers are reduced to two NADH molecules and 2 net ATPs are produced.Jun 10, 202

Answer 6

https://www.google.com/search?q=what+occurs+before+fermentation&rlz=1CAQIMT_enUS940&ei=dILSYJK8DImZ_Qah7IvoBQ&oq=what+happens+before+ferm&gs_lcp=Cgdnd3Mtd2l6EAEYADIGCAAQFhAeMgUIABCGAzIFCAAQhgM6DggAEOoCELQCENkCEOUCOgUIABCRAjoICAAQsQMQgwE6CwguELEDEMcBEKMCOgIIADoOCC4QsQMQgwEQxwEQowI6BQgAELEDOgQIABBDOgUIABDJAzoFCAAQkgM6BQguELEDOgQIABAKOgIILlDT9g5Y-ZgPYOOkD2gDcAJ4AYABrQKIAYMakgEINi4xOC4xLjGYAQGgAQGqAQdnd3Mtd2l6sAEIwAEB&sclient=gws-wiz&safe=active&ssui=on source

Answer 7

So D would be the answer?

Answer 8

thank you for the help!