Examkin

Soru

Zorluk: KolayHealth, Nutrition, and Disease

Unlike bacteria, which possess their own cellular machinery to grow and divide independently, what do viruses require in order to replicate?

  1. A
    An extracellular nutrient broth
  2. A living host cellCevap
  3. C
    Direct exposure to sunlight
  4. D
    Continuous absorption of dietary minerals

Cevap

A living host cell is required for viral replication.
Viruses consist primarily of genetic material enclosed within a protein coat and lack independent metabolic machinery. Consequently, they must infect a living host cell and utilize the host's enzymes, ribosomes, and energy to replicate genetic material and assemble new viral particles.

Adım Adım Çözüm

1
Identify the biological nature of viruses compared to cellular pathogens.
Viruses are obligate intracellular parasites lacking ribosomes, metabolic enzymes, and cellular membranes.
Understanding the structural differences between bacteria and viruses determines their reproductive mechanisms.
2
Determine the necessary condition for a virus to assemble new particles.
The virus must attach to, enter, and hijack the biosynthetic machinery of a living host cell.
Without a host cell's protein synthesis and replication machinery, a virus remains an inert particle.

Anahtar Kavram

Obligate intracellular nature of viruses versus independent bacterial replication
Tahmini Süre:40s
Bu soruyu puanla

Konular

Health, Nutrition, and Disease

Bu konudan daha fazla soru