Which is an incorrect match of taxonomic category and common name?
A. Dipnoi/lungfish
B. Actinopterygii/ray-finned fish
C. Apoda/caecilians
D. Squamata/lizards and snakes
E. theropods/crocodiles
E. theropods/crocodiles
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Which of the following is a characteristic associated with secondary antibody responses?
A. Shorter lag phase B. Higher antibody affinity C. Higher antibody titer D. All of the choices are correct.
A pea is actually a seed.
a. true b. false
Some restriction enzymes do not leave sticky ends when cutting DNA molecules; rather, they cut a restriction site down the middle and leave "blunt-ended" DNA molecules, which do not have any single-stranded nucleotide extensions. Which of the following
is not a likely outcome when trying to insert a gene into a plasmid when both have been cut with the same "blunt-ended" restriction enzyme? A) The gene might be inserted into the plasmid by forming hydrogen bonds. B) The gene might be inserted into the plasmid multiple times in a row. C) The gene might insert into the plasmid in the proper (forward) orientation. D) The gene might insert into the plasmid in the wrong (backward) orientation.
All of the following are epigenetic mechanisms, EXCEPT ________
A) changing gene expression by adding and removing methyl groups to DNA B) changing gene expression by the use of small noncoding RNAs C) changing gene expression by the use of long noncoding RNAs D) changing gene expression by changing the nucleotide sequence through mutation E) changing gene expression by adding and removing chemical groups to histone proteins