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Viruses are composed of two main parts an outer protein covering called a capsid and an inside core of either DNA or RNA. Not both DNA and RNA. Some of these have an envelope over the capsid. The ones that do not are said to be naked. The proteins in the capsid allow the virus to attach to the "docking stations" proteins of the host cell. The naked viruses are more resistant to changes in the environment.
Some naked viruses include poliomyelitis, warts, the common cold, chickenpox, shingles, mononucleosis, herpes simplex (cold sores), influenza, herpes viruses and HIV (AIDS).
Some enveloped viruses include norovirus (stomach bug), rotavirus and human papillomavirus (HPV).
The envelope can be damaged by freezing temperatures, chlorine, and phenol. If damaged the virus cannot infect.
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Is the following sentence true or false Both chloroplasts and mitochondria are enclosed by two envelope membranes?
True. Both chloroplasts and mitochondria have a double-membrane envelope that surrounds their organelle structures.
True or false the envelope surrounding a virus aids the virus in entering the cell and the virus DNA is found in that envelope?
True. The envelope of a virus helps it enter the host cell by fusing with the cell membrane. The virus DNA can be found enclosed within this envelope, along with other viral proteins necessary for infection and replication.
The core of some viruses is carbohydrate in nature true or false?
False
What are false positives and false negatives in terms of intrusion detection systems?
viruses
Would it be true to say that synovial membrane is a true membrane?
false
The nuclear envelope regulates which substances enter and leave a cell?
False
Is a eukaryotic cell has organelles surrounded by membranes true or false?
true
Hydrophilic ends of proteins are oriented toward membrane surfaces. true or false?
False. Hydrophilic ends of proteins are oriented away from the membrane surfaces, as they interact with the aqueous environment outside or inside the cell. This allows them to interact with water molecules and maintain stability within the cell membrane.
Do animals have immunity to viruses true or false?
False. Some viruses can still affect any animal. Some animals are immune to certain virus. It really depends on the animal, some are affected, and some arnt.
There are many parts of the body that viruses cannot invade?
True
What about a cell's resting membrane potential is FALSE?
A false statement about a cell's resting membrane potential could be that it does not involve the movement of ions across the cell membrane. In reality, the resting membrane potential is primarily due to the unequal distribution of ions, such as sodium and potassium, across the membrane, maintained by ion channels and pumps.
Proteins at the inner surface of the plasma membrane attach the membrane to the cells support structure making the cell rigid?
false
