Question

One student claims that yogurt is made by lactic acid fermentation. Another claims that yogurt is made of alcoholic fermentation. Testing for which of the following substances could determine whether alcoholic fermentation or lactic acid fermentation was going on?
A. NAD+
B. Pyvurate
C. Oxygen
D. carbon dioxide

Answer 1

HELP!!!!

Answer 2

do u know when does lactic acid fermentation take place?

Answer 3

or alcoholic fermentation?

Answer 4

In the muscles under low oxygen conditions?

Answer 5

yes...dat is true...during exertion...but do u know that some organisms like yeast and some bacteria like lactobacillus carry out this fermentation?

Answer 6

No, I actually didn't.

Answer 7

see you know that our cellular respiratio is aerobic type? aerobic is respiration in presence of oxygen.

Answer 8

I really have no clue what your talking about:/

Answer 9

okay...see basically there are 2 types of respiration..aerobic and anaerobic.
aerobic occurs in presence of oxygen and anaerobic in absence of oxygen.

Answer 10

there are few organisms that carry out aerobic respiration like us,humans. but some organisms carry out anaerobic respiration like yeast or lactobacillus...with me so far?

Answer 11

Yes.:)

Answer 12

okay..so now aerobic repiration in short is breaking down carbohydrates to release energy in the form of ATP. With this CO2 is also released.

Answer 13

C6H12O6 (s) + 6 O2 (g) → 6 CO2 (g) + 6 H2O (l) + heat
this is the reaction.

Answer 14

Ok, I think im starting to understand.

Answer 15

cool:) now we go 2 anaerobic respiration. hold on i need 2 find d exact equation for u

Answer 16

Alright.:)

Answer 17

ya got it...so now in anaerobic respiration carbohydrate is broken down 2 release nergy in form of atp. the by products are lactic acid in case of lactic acid fermentation or alcohol in case of alcohol fermentation and CO2.

Answer 18

I understand alittle.

Answer 19

sorry:/ im not wasting your time am i?

Answer 20

nope...not at all:)

Answer 21

So would it be B?

Answer 22

Are you still there?

Answer 23

@shrutipande9

Answer 24

sorry...internet issues.

Answer 25

Ok so would the coreecet answer be B?

Answer 26

no..in both the fermentations pyruvate is converted to alcohol or lactic acid.

Answer 27

I'm confused again.

Answer 28

ok wait...u clear till what is aerobic and wat is anaerobic?

Answer 29

Yes.

Answer 30

okay...now check dis image... u will understand better i think
http://fhs-bio-wiki.pbworks.com/w/page/12145772/Fermentation

Answer 31

yeast is alcoholic and muscle is lactic acid fermentation

Answer 32

Ok. So it would be C?

Answer 33

nope...see both these fermentations are without oxygen...anaerobic

Answer 34

so u cannot diff according 2 pyruvate and oxygen

Answer 35

So A.

Answer 36

did u see d image?

Answer 37

Yea.

Answer 38

srry @Dappy its not A...so u left with only D.

Answer 39

Its D then?

Answer 40

what i think is...u read about the whole anerobic process...

Answer 41

i hope helped:)

Answer 42

Then its D?

Answer 43

yep...its D

Answer 44

Thank you so mucch.

Answer 45

ur welcum:)