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15 Cards in this Set
- Front
- Back
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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. |
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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.
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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. |
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Retroviruses have a gene for reverse transcriptase that USES VIRAL RNA AS A TEMPLATE FOR DNA SYNTHESIS.
True or False? |
True.
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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. |
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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.
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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. |
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Bacteria defend against viral infection through the action of RESTRICTION NUCLEASES THAT CHOP UP FOREIGN DNA.
True or False? |
True.
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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. |
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The fact that tumor viruses MAY BE TRANSFERRED BETWEEN ANIMALS BY PHAGE is untrue.
True or False? |
True.
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The herpesvirus IS THE RETROVIRUS THAT HAS BEEN LINKED TO HIV, THE VIRUS THAT CAUSES AIDS.
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False.
It acts as a provirus when its DNA becomes incorporated into the host cell's genome. |
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The replication of the genome of an RNA virus uses RNA REPLICATING ENZYMES CODED FOR BY VIRAL GENES.
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True.
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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. |
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A PROTO-ONCOGENE will never be an episome.
True or False? |
True.
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Tiny molecules of naked RNA that may act as infectious agents are REOVIRUSES.
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False.
They are viroids. |
