Lactase refers to an enzyme that can dissociate lactose sugar into glucose and galactose. This enzyme plays an important role in the digestion of milk that comprises high lactose sugar. In case, if a mutation occurs in the gene codon of lactase, then two possibilities can take place. These are as follows:
1. Loss of mutation: In this case, the person becomes lactose intolerant because of mutation in lactase gene codon. Due to this, there is low mRNA expression and thus low production of the enzyme lactase. This is also known as lactase non-persistent phenotype.
2. Gain in mutation: In this case, the person gain an increase in mRNA expression of the lactase gene, thus more production of lactase takes place than usual. This kind of individual exhibits lactase persistent phenotype.
C. Enzymes increase the rate of the chemical reactions carried out during metabolism.
Answer:
In chemistry and quantum mechanics, an orbital is a mathematical function that <u><em>describes the wave-like behavior of an electron, electron pair</em></u>, or (less commonly) nucleons. An orbital may also be called an atomic orbital or electron orbital.
Explanation:
BRAINLIEST?
A. 12.5 m/s.
The average speed is defined as the relationship between the displacement made by a body and the total time it took to perform it.
The formula that will allow you to calculate the average speed is:
v = d/t, where d is the traveled distance and t the time it took to travel the distance.
We hace to convert 4 minutes to second:
(60 s/1 min)*(4 min) = 240 s
So, the average speed is:
v = 3000 m/240 s
v = 12.5 m/s
Answer:
A cell that makes steroid hormones
Explanation:
A cell that makes steroid hormones have the greatest concentration of smooth endoplasmic reticulum. It is named so because it is not studded with ribosomes on its surface unlike rough endoplasmic reticulum. It has smooth appearance. Its main function are synthesizing lipids, carbohydrates, steroid hormone and detoxification.
