Lymph nodes aid in the destruction of bacteria and viruses

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

Which one of the following terms applies to the phylum Platyhelminthes?  

A.  radial cleavage B.  protostome C.  diploblastic D.  acoelomate E.  radial symmetry

Biology & Microbiology

Ebola hemorrhagic fever is caused by which type of virus?

A. filovirus B. rhabdovirus C. paramyxovirus D. rubulavirus E. pneumovirus

Biology & Microbiology