Answer the following question given this paragraph: Steps of Virus Infections A virus must use cell processes to replicate. The viral replication cycle can produce dramatic biochemical and structural changes in the host cell, which may cause cell damage. These changes, called cytopathic (causing cell damage) effects, can change cell functions or even destroy the cell. Some infected cells, such as those infected by the common cold virus known as rhinovirus, die through lysis (bursting) or apoptosis (programmed cell death or "cell suicide"), releasing all progeny virions at once. The symptoms of viral diseases result from the immune response to the virus, which attempts to control and eliminate the virus from the body, and from cell damage caused by the virus. Many animal viruses, such as HIV (human immunodeficiency virus), leave the infected cells of the immune system by a process known as budding, where virions leave the cell individually. During the budding process, the cell does not undergo lysis and is not immediately killed. However, the damage to the cells that the virus infects may make it impossible for the cells to function normally, even though the cells remain alive for a period of time. Most productive viral infections follow similar steps in the virus replication cycle: attachment, penetration, uncoating, replication, assembly, and release (Figure 21.8). Attachment A virus attaches to a specific receptor site on the host cell membrane through attachment proteins in the capsid or via glycoproteins embedded in the viral envelope. The specificity of this interaction determines the hostand the cells within the hostthat can be infected by a particular virus. This can be illustrated by thinking of several keys and several locks, where each key will fit only one specific lock. Q: Symptoms of viral diseases result from what kind of response to a virus? Choices: - infection - pathogenic - mutation - immune A:
immune
(Question)
Answer the following question given this paragraph: Breakwaters are structures that protect the coast like barrier islands. Groins are structures that help prevent longshore drift from eroding a beach. Q: What are structures that protect the coast like barrier islands called? Choices: - domes - dunes - fortresses - breakwaters A:
(Answer)
breakwaters
Ques: Answer the following question given this paragraph: Alkynes are unsaturated hydrocarbons with at least one triple bond between carbon atoms. Q: What are unsaturated hydrocarbons with at least one triple bond between carbon atoms? Choices: - amines - lipids - ketones - alkynes A:
Ans: alkynes
(Q).
Answer the following question given this paragraph: Scientists make many measurements during experiments. Humans and equipment can make mistakes. Errors are often unavoidable. This is called experimental error . Errors may be due to the equipment being used. In this case, the numbers may be always skewed in one direction. For example, a scale may always measure one-half of an ounce high. People can also make errors. A measurement may not be made precisely. For example, a stopwatch may be stopped too soon or too late. But probably not always in the same direction. To correct for this, many measurements are taken. The measurements are then averaged. Experiments always have a margin of error associated with them. Q: How do you decrease errors in an experiment? Choices: - write about it - ask God - decrease measurements - take many measurements A:
(A).
take many measurements
Ques:Answer the following question given this paragraph: An electric circuit consists of one or two closed loops through which current can flow. It has a voltage source and a conductor and may have other devices such as lights and switches. Q: What consists of one or two closed loops through which current can flow? Choices: - thermal reaction - magnetic poles - cooling circuit - electric circuit A:

Ans:electric circuit
Answer the following question given this paragraph: The processes of evolution are fundamental to much of biology. Why do people have such a hard time understanding them?. Q: Where in relation to the home, are levels of vocs found to be higher? Choices: - On slopes - in Fields - outdoors - indoors A:
indoors