Answer:
Due to less steps and requires less energy.
Explanation:
The bacterial cell is able to use glucose first as an energy source then switch to lactose because glucose requires less steps and less amount of energy for the break down as compared to lactose. If lactose is the only sugar available to the bacterial cells, then bacterial cells will use it as energy source for the production of energy. In order to use lactose, the bacteria must express the lac operon genes, which encode the main enzymes for lactose uptake and metabolism.
The best answer for your question is A
The risk factors of testicular cancer are;
1. Hiv infections
2. Family history of testicular cancer.
3. Males who are known to have an undescended testis.
The subjective of testicular cancer include;
1. Evidence of metastasis which include gyro, back pain.
2. Feeling of heaviness in the testicles.
3. Swelling and lumps of testes
Objective of testicular cancer include;
1. Swelling of lymph nodes in groin
2. Lump which is palpable.
3.Enlarged testes which will have no pain.
