Lymph nodes aid in the destruction of bacteria and viruses
Indicate whether the statement is true or false
TRUE
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The DNA-binding site for the lactose repressor was identified by:
A. causing cleavage and subsequent methylation at purine residues. B. methylating and hence protecting the DNA. C. comparing DNA sequences protected by wild-type and mutant repressors. D noting the DNA sequences that were protected from methylation by the repressor. E. reading the DNA sequence that was methylated by DMS after repressor binding.
The term angiosperm refers to:
A. the narrow sperm of angiosperms B. the enclosure of the seed within a fruit C. the presence of endosperm D. the branching of vascular veins E. none of the other choices provided
Which one of the following terms applies to the phylum Platyhelminthes?
A. radial cleavage B. protostome C. diploblastic D. acoelomate E. radial symmetry
Ebola hemorrhagic fever is caused by which type of virus?
A. filovirus B. rhabdovirus C. paramyxovirus D. rubulavirus E. pneumovirus