What normally happens to the levels of lactase produced throughout a person’s li

Question

What normally happens to the levels of lactase produced throughout a person’s lifetime?

What is translation?

Using your knowledge of activators and repressors, hypothesize two ways in which transcription of the LCT gene

could be turned off.

Explain the effect of the mutation that occurs among northern European people on LCT gene expression.

What are the similarities and differences between the lactase persistence mutations found in Africanpopulations and the one found in European populations? (Consider, for example, type of mutation, location,

function.)

Explanation / Answer

1. An enzyme which is essential for the digestion of complete whole milk and breaks down lactose is termed as lactase. It is found in most of the organisms including human beings. The people who lack lactase enzyme show the symptoms of lactose intolerance.

In the initial stage of life, in case of humans the levels of lactase are high in the initial stage of life. So when humans are born they have high levels of lactase in body but as time passes the level decreases overtime.

So normally throughout a person's lifetime the levels of lactase produced decreases.

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