HIV at One Time Only Infected Nonhuman Primates but Now

question 142

Multiple Choice

HIV at one time only infected nonhuman primates but now infects humans as well. Likewise, the avian flu only infected birds but now infects humans. What causes the host range of a virus to increase?

• A)The size of the virus changes over time and allows the virus to infect a different host cell.
• B)The virus integrates with another virus to gain the DNA sequences that allow infection of a new host cell.
• C)The virus gains entry into a new host cell through random mutation of the virus's genome.
• D)Changes in the human genome over time make humans more susceptible to infection by different kinds of viruses.
• E)None of the other answer options is correct.

Evaluate experimental designs in disproving spontaneous generation and establishing the principles of biogenesis.

Describe the central dogma of molecular biology and the unique functions and properties of DNA as an informational molecule.

Understand federalism and the division of powers between federal and state governments.

Recognize the constitutional limitations on both state and federal powers.

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Definitions:

Basis

The underlying support or foundation for an idea, argument, or process; in materials, it could refer to the primary component or substance that forms the starting point.

Tolerance Position Letters

In engineering, symbols used in geometric dimensioning and tolerancing to represent the permissible limits of variation in the position of parts.

External Dimensions

Refers to measurements that describe the outer limits or size of an object or component.

Internal Dimensions

Measurements within an object, space, or container, referring to its size or volume from the inside.