Answer:
A
Explanatibubu6y5i4trgiktnenfte
In HIV-infected patients, there is a gradual loss of CD4+ T cells over time. These cells, also called T helper cells, organize the immune system's attack on disease-causing invaders, like Salmonella.
Answer:
<u>ligase</u>
Explanation:
Short segments of newly synthesized DNA are joined into a continuous strand by <u>ligase</u>
