Lactic acid fermentation can be modeled by which equation?
(1 point)
Lactic acid +
• NADH → Pyruvic acid + NAD+
Lactic acid +
• NADH → Pyruvic acid NADH
Pyruvic acid +
• NADH → Lactic acid + NAD+
Pyruvic acid +
• NAD+ → Lactic acid + NADH
Lactic acid + • NADH → Pyruvic acid + NAD+
The correct equation that models lactic acid fermentation is: Pyruvic acid + NADH → Lactic acid + NAD+.
To determine the correct equation for lactic acid fermentation, let's go through the provided options one by one.
Option 1: Lactic acid + NADH → Pyruvic acid + NAD+
Option 2: Lactic acid + NADH → Pyruvic acid NADH
Option 3: Pyruvic acid + NADH → Lactic acid + NAD+ (Possible Answer)
Option 4: Pyruvic acid + NAD+ → Lactic acid + NADH
Lactic acid fermentation is an anaerobic metabolic process that occurs in various organisms, including bacteria and muscle cells. During lactic acid fermentation, pyruvic acid, which is the product of glycolysis, is converted into lactic acid.
Looking at the options, we can eliminate options 1 and 2 because they involve the production of pyruvic acid, rather than the conversion of pyruvic acid into lactic acid. This leaves us with options 3 and 4.
To determine the correct equation between these two options, we need to understand the role of NADH and NAD+ in lactic acid fermentation. NADH is the reduced form of NAD+ and acts as an electron carrier during metabolic reactions. In lactic acid fermentation, NADH is oxidized back to NAD+ by accepting electrons from pyruvic acid, which is then converted into lactic acid.
Therefore, the correct equation for lactic acid fermentation is:
Pyruvic acid + NADH → Lactic acid + NAD+.
Hence, the correct choice is Option 3: Pyruvic acid + NADH → Lactic acid + NAD+.