In the absence of glucose and in the presence of lactose, the lac repressor is bound to the allolactose, and the lac operon can start.
<h3>What is the lac operon?</h3>
A lac operon is an inducible operon that is activated in the presence of lactose in the outer surroundings of the bacteria. Operon is a series of genes present in the bacterial DNA.
When the lactose is present, the repressors move to bind the allolactose, and as a result, the RNA polymerase can access the lac operon. The repressor has more affinity for allolactose than the operator. RNA polymerase, along with cAMP and CAP proteins, initiates the transcription of lac operon. The transcript has genes for galactosidase, permease, and transacetylase.
Hence, in the absence of glucose and in the presence of lactose, the lac repressor is bound to the allolactose.
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Answer: Wind Turbines
Explanation: Uses winds to create electricity which is natural; therefore, unlike other sources of electricity like burning fossil fuels it doesn't create heat. This reduces global warming.
The differences in health and mortality by gender is a phenomenon for which researchers have many possible explanations.
There have been studies that have indicated that there is enough variation in the average health of males and females to conclude that there are factors at play that are affecting health.
Amongst the many possibilities, scientists have mentioned:
- Gender-reliant genetic vulnerability
- Hormonal factors
- Differences in physiology
as the main possible reasons.
Hormones play a big part in the health of each individual and are vastly different between genders, along with the endless differences in physiology at a <u>molecular level</u>. These factors together may explain why some members of a gender are more vulnerable to genetic illness.
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Answer: Plaques
Explanation:It’s used to describe the accumulation of different kinds of deposits on the teeth, which promote dental caries.
