Transducing virulent phages do not lyse the cells they invade because
A. transformation is taking place in the phage and this is transferred to the bacterium.
B. bacterial DNA has replaced critical viral DNA in the phage.
C. their virulence is dependent on the bacteria and virus replicating together.
D. the lytic genes are unable to enter during penetration and are shed outside the host.
B
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The process by which an electrical charge is used to introduce DNA into a cell to produce a transgenic organism is called electroporation
Indicate whether the statement is true or false
. Imagine that you have been bitten by a poisonous snake with neurotoxic venom. Thankfully, you are rushed to the emergency room of a local hospital, where you receive antivenom. Your condition subsequently returns to normal. Before your release, your physician chastises you for not being more careful. He informs you that you were within minutes of not being able to breathe as the result of the venom's effect on the nervous control of your breathing. As a biology student, you consider this carefully, and hypothesize that your breathing would have stopped because the venom would cause
A. your trachea to collapse. B. your lungs to collapse. C. your diaphragm to become inactive. D. your blood to lose oxygen.
Vitamins are ________
A) organic molecules that are required in the diet in very small amounts B) nutrients that we can synthesize from simpler molecules C) important supplements for children, but not adults D) required to synthesize most amino acids
The anticodon of an incoming ____________ molecule, carrying its amino acid, pairs with the mRNA __________ at the ribosome.
A. tRNA ... codon B. amino acid ... structure C. tRNA ... phosphate D. ribosome ... protein