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15 Cards in this Set

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The study of the genetics of viruses and bacteria has ILLUMINATED THE SEXUAL REPRODUCTIVE CYCLES OF VIRUSES.

True or False?
False.

It did, however, provide information on the molecular biology of all organisms, develop an understanding of the causes of cancer, and many other things.
Beijerinck concluded that the cause of tobacco mosaic disease was not a filterable toxin because THE INFECTIOUS AGENT REPRODUCED AND COULD BE PASSED ON FROM A PLANT INFECTED WITH FILTERED SAP.

True of False?
True.
Viral genomes may be MISFOLDED INFECTIOUS PROTEINS.

True or False?
False.

They may be single-stranded DNA, double-stranded RNA, a linear single-stranded RNA molecule, or a circular double-stranded DNA molecule.
Retroviruses have a gene for reverse transcriptase that USES VIRAL RNA AS A TEMPLATE FOR DNA SYNTHESIS.

True or False?
True.
Virus particles are formed from capsid proteins and nucleic acid molecules USING ENERGY FROM ATP STORED IN THE TAIL.

True or False?
False.

They are formed by spontaneous self-assembly.
A virus has a base ratio of (A+G)/(U+C)=1. The type of virus is A DOUBLE-STRANDED RNA VIRUS.

True or False?
True.
Vertical transmission of a plant viral disease may involve INSECTS CARRYING VIRAL PARTICLES BETWEEN PLANTS.

True or False?
False.

It involves the inheritance of an infection from a parent plant.
Bacteria defend against viral infection through the action of RESTRICTION NUCLEASES THAT CHOP UP FOREIGN DNA.

True or False?
True.
Drugs that are effective in treating viral infections PRODUCE VACCINES THAT STIMULATE THE IMMUNE SYSTEM.

True or False?
False.

Drugs that are effective in treating viral infections interfere with the synthesis of viral nucleic acid.
The fact that tumor viruses MAY BE TRANSFERRED BETWEEN ANIMALS BY PHAGE is untrue.

True or False?
True.
The herpesvirus IS THE RETROVIRUS THAT HAS BEEN LINKED TO HIV, THE VIRUS THAT CAUSES AIDS.
False.

It acts as a provirus when its DNA becomes incorporated into the host cell's genome.
The replication of the genome of an RNA virus uses RNA REPLICATING ENZYMES CODED FOR BY VIRAL GENES.
True.
The replication of the genome of a DNA virus uses RNA POLYMERASE FROM THE HOST.

True or False?
False.

It uses DNA polymerase from the host.
A PROTO-ONCOGENE will never be an episome.

True or False?
True.
Tiny molecules of naked RNA that may act as infectious agents are REOVIRUSES.
False.

They are viroids.