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Lactic acid has a chiral carbon atom or a carbon atom with four different groups attached to it. So lactic acid exists in two different forms d-lactic acid and l-lactic acid. The four diferent groups of around the chiral carbon are arranged clockwise in one isomer and anticlockwise in the other.the groups arranged in the clockwise direction rotate plane polarised light to right and the groups arranged in the anticlockwise direction rotate it to left.

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Q: Explain optical activity of lactic acid?
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What are the two main types of lactic acid?

Lactic acid has two optical isomers: L-lactic acid and D-lactic acid.


Explain why muscles must use lactic acid fermentation instead of cellular respiration during intense physical activity?

Because mammalian muscle cells are genetically programmed to perform lactic acid fermentation, not ethanol fermentation.


What chemical enters the muscle in activity?

lactic acid


What builds up in muscles after a few seconds of intense activity?

Lactic acid is produced by muscles during intense activity. The human body has a way of removing the lactic acid. When the production of lactic acid overcomes the body's ability to remove it, a side stitch commonly occurs.Regular exercise can improve the body's ability to cope with lactic acid buildup.


One type of fermentation in muscle cells produces?

Lactate (also known as lactic acid) and NAD+


What substance is produced anaerobically during strenuous activity?

Alcohol (and CO2), or Lactic Acid


When does an activity become anaerobic-?

An activity or exercise is anaerobic if it is intense enough to trigger lactic acid production.


Is lactic a base or an acid?

acid as in lactic acid?


Explain what causes oxygen debt and muscle fatigue?

The production of lactic acid anaerobically...


What are the products of lactic acid frementation?

Lactic acid (or lactate, which is the anion of lactic acid) is the product of lactic acid fermentation.


Does milk is converted into curd by the activity of micro organisms?

Yes, the microorganisms produce lactic acid. Milk curdles in the presence of an acid.


How do you explain fatigue in the muscular system?

Accumulation of lactic acid in the muscle from anaerobic ATP production.