Some viruses can be crystallized and their structures analyzed. One such virus is Desmodium, or yellow mottle virus, which infects beans. This is a member of the tymovirus group and has a single-stranded RNA genome of ~6,300 nucleotides. Its virion is 25—30 nm in diameter, and is made up of 180 copies of a single capsid protein that self-associate to form each capsomere, which has icosahedral symmetry with 20 facets.
In a cell-free system, what other components would you have to provide for this virus to express its genes?
A) ribosomes, tRNAs and amino acids
B) ribosomes, tRNAs, amino acids, and GTP
C) RNA nucleotides and GTP
D) RNA nucleotides, RNA polymerase, and GTP
E) bean cell enzymes
Invasive species provide an example of predator pressure.
Structures of the endocrine system.
The digestive system.
Male Reproductive System - Ejaculatory ducts
The Nervous System and Homeostasis
The Female Reproductive System