The lungfish Protopterus aethiopicus has a genome 38 times larger than that of humans. Most of the DNA in this species is noncoding repetitive DNA. What type of library would allow you to compare just the genes in the lungfish to the genes in humans? Select one: a. PCR library b. cDNA library c. Transgenic library d. Genomic library e. Knockout library

cDNA library

Explanation:

The complementary DNA (cDNA) library is a library of genes of an organism that can be encoded into a functional protein, meaning it excludes all non-coding repetitive DNA. The complementary DNA can be made by the process of reverse transcription of the messenger RNA (mRNA), by the enzyme reverse transcriptase to form a DNA transcripts. These DNA transcripts can now be cloned to form the cDNA library.

Owing to the fact that the genome of human is 38 times less than that of lung fish, with that of lung fish having a lot of noncoding repetive DNA, the best way to compare their genes is by the use of cDNA library, because it only contains genes that codes for a protein and hence helping to exclude the non coding sequence of lungfish.

i would say d

explanation:

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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