Answer:
DNA helicase
Explanation:
DNA helicase belongs to the class of biological molecules known as enzymes, which are biological catalysts. hope that helps love!
There are 46 DNA molecules in each somatic cell.
Non-renewable energy sources are sources that will run out in our lifetimes and for the following lifetimes. Coal is a non-renewable resource. It is a black or brownish rock that produces energy when burned. Oil is a non-renewable energy. Oil is a liquid fossil fuel. Oil can be access through drilling the earth’s crust or the ocean floor. Wood is a renewable resource. The seeds can be planted again to create more trees and obtain wood. Natural gas is a non-renewable resource. It is found a few hundred meters underground. It is mostly made up of methane.
Answer:
The lactose present prevents the production of lactase
Explanation:
This question is describing a set of genes in bacteria called LAC OPERON. Lac operon controls the production of lactase, which is the enzyme that digests lactose. However, this gene can be regulated at the transcription level i.e caused to be transcribed or not depending on certain factors.
According to the question, lac operon, which regulates the production of enzymes will be transcribed and subsequently translated i.e. turned on when there is a substrate (lactose) that the produced enzyme will work on. However, when there is no need of the lactase enzyme or there is absence of lactose (substrate), the lac operon gene is turned off.
Note that, the statement that "The presence of lactose prevents the production of lactase" is not correct.
Answer: Cushing Syndrome
Explanation:
Cushing Syndrome occurs when the body is exposed to high level of cortisol for a long time either externally (taken into the body from outside ) or internally (secretion in excess of the hormone called cortisol by the body) . It can also be called hypercortisolism .
The symptoms of Cushin Syndrome may vary depending on the severity of the excess cortisol secretion. Females may have irregular menstrual period due to this condition.
Asthma and arthritis patients who take corticosteroids and experiences the mentioned symptoms should seek medical attention for diagnosis.
