| 18.1 - 18.2 | 18.3 | 18.4 |
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What is the late 1800s?
The time viruses were first discovered.
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What is a bacterial chromosome?
A circular DNA molecule.
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What are operons?
A unit made up of linked genes that is thought to regulate other genes responsible for protein synthesis.
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What are enzymes, ribosomes, and small molecules of host cells.
The molecules used my viruses.
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What is a mutation?
A change in the genetic code.
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What is an operator site?
This switches the operon in the DNA on or off.
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What are damaged cell walls?
Viruses enter the cell in these areas.
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What are new bacterial strands?
These arise from transfer of DNA from one cell to another.
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What is a repressible operon?
Operators that are always on (transcription occurring) unless a signal (for example, too much product) turns them off.
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What are viroids?
These are naked RNA molecules that infect plants.
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What are R plasmids?
A plasmid containing one or several transposons that bear resistance genes.
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What is a catabolite activator protein?
This promotes transcription.
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What are Prions?
Slow acting virtually indestructible infectious proteins.
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What is transduction?
Bacterial DNA is carried from one cell to another via Phages.
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What is an inducer?
An agent capable of activating specific genes.
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