Biology Help?

by Rachel on April 24, 2011

Which of the following statements is false?

A. A bacteriophage is a virus that attacks bacteria.
B. Some complex viruses have a genome with both RNA and DNA.
C. Viruses cannot reproduce by themselves; they must infect a host cell in order to replicate.
D. In general, viruses are smaller than bacteria.
2. Read the statements below, then select the correct answer from the choices.

Statement #1: HIV is the virus associated with AIDS.
Statement #2: Epstein-Barr is the virus associated with warts.
Statement #3: Herpes virus causes cold sores.
Statement #4: Human papilloma virus causes mononucleosis.

A. All of the above statements are true.
B. None of the above statements are true.
C. Statements #1 and #3 are correct, but statements #2 and #4 are incorrect.
D. Statements #2 and #4 are correct, but statements #1 and #3 are incorrect.
3. Lytic viruses ___________.

A. typically have short incubation periods
B. destroy the host cells
C. use the host cells’ resources for survival
D. all of the above
4. Which of the following statements is true about virus shape?

A. A helical virus has many sides and is roughly spherical; a polyhedral virus is shaped like a rod, with capsid proteins winding around the core in a helix; and a complex virus consists of a polyhedral head attached to a helical tail.
B. A complex virus has many sides and is roughly spherical; a polyhedral virus is shaped like a rod, with capsid proteins winding around the core in a helix; and a helical virus consists of a polyhedral head attached to a helical tail.
C. A polyhedral virus has many sides and is roughly spherical; a helical virus is shaped like a rod, with capsid proteins winding around the core in a helix; and a complex virus consists of a polyhedral head attached to a helical tail.
D. None of the above statements are true.
5. The protein coat of a virus is called the __________, while the inner core is known as the ___________.

A. capsid; genome
B. genome; cell wall
C. mitochondrion; capsid
D. ectophage; endophage
6. Scientists believe most viruses are somewhere between 20 and 400 nanometers long. How many nanometers are there in one meter?

A. one thousand
B. one million
C. one trillion
D. one billion
7. In a lysogenic infection, __________.

A. the virus genetic material is incorporated into the host cell’s chromosomes, forming a provirus
B. the virus genetic material may replicate with the host cell for many generations
C. it might take years before the virus actually harms the organism
D. all of the above
8. Which of the following statements best describes reverse transcriptase?

A. It is a protein secreted by cells in the immune system in response to a foreign substance.
B. It is a special enzyme carried by retroviruses that changes RNA to DNA.
C. It is the name of the virus that causes polio.
D. It is the name of an enzyme carried by viruses that allows them to carry out respiration.
9. Which of the following statements is false?

A. HIV is an example of a retrovirus.
B. Human papilloma is an example of a lysogenic virus.
C. Influenza virus is a lytic virus.
D. TMV is an example of a DNA virus.
10. Some viral illnesses can be contained with __________, which contain a weakened form of a virus. The weakened virus does not actually infect the organism, but it stimulates the immune system to produce antibodies.

A. vaccines
B. mutations
C. glycoproteins
D. prophages

FINISH
Please Help I Need To Pass To Graduate!!

{ 1 comment… read it below or add one }

love l April 24, 2011 at 5:55 am

you probably need to hit the books for this one! too long of a question for ppl to bother about it

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