VIRUS
-Virus has ultra-microscopic size,
about 20-30 milimikron, so it can only be observed with an electron microscope
-Consists
of acid core, the DNA or RNA, and capsid (protein coat that gives shape to the
virus)
-Viruses
can only reproduce inside a living cell or tissue
-The
virus is not a cell, so it does not have cytoplasm, nucleus, or nuclear
membrane
-The
shape is diverse, such as rods, oval, round, and T
-It
is a true parasite
-Can
be crystallized
Virus
body consists of two parts, the head and tail.
On
the head there is :
-Capsid
Namely
the wrapping layer virus body composed of protein. In some types of the virus,
the capsid is still there next to the outer wrapper composed of lipids and
carbohydrates. Capsid serves to give shape to the virus as well as protection
from adverse environmental conditions.
-Genetic
material
That is the nature of the molecules that are dropped inside the capsid. Genetic material can be either RNA (ribonucleic acid) or DNA (deoxyribonucleic acid). In the body, the virus has only one type of nuclei acid (nucleic acids), which have RNA or DNA alone, never both.
At the tail there is a tail sheath and tail fibers are essential for virus attachment to the host cell body when it will be reproducing.
REFERENSI : Jago Biologi SMA
That is the nature of the molecules that are dropped inside the capsid. Genetic material can be either RNA (ribonucleic acid) or DNA (deoxyribonucleic acid). In the body, the virus has only one type of nuclei acid (nucleic acids), which have RNA or DNA alone, never both.
At the tail there is a tail sheath and tail fibers are essential for virus attachment to the host cell body when it will be reproducing.
REFERENSI : Jago Biologi SMA
