The human immunodeficiency virus specifically targets B cells.
a. true
b. false
Answer: b. false
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What did comparing the sequence of the mitochondrial genome in trypanosomes with the sequence of mature mitochondrial RNAs demonstrate?
A) The RNA sequences are similar to the genome sequence, but have insertions and deletions of uracil residues. B) The RNA sequences align perfectly with the genomic DNA from which it is transcribed. C) All of the proteins necessary for translation are encoded in the mitochondrial genome. D) Translation is initiated in mitochondria only at AUG codons. E) Some mature RNAs do not have start and stop codons.
Once an adaptation appears, it remains in all the descendants unless the species becomes extinct
Indicate whether the statement is true or false
What is the muscular chamber where offspring develop?
A. Uterus B. Vagina C. Oviduct D. Ovary E. Cervix
Who developed the culturing technique to enrich for a certain population of microbial cells from a complex community based on a particular metabolic phenotype of interest?
a. Frederick Griffith b. Joseph Lister c. Martinus Beijerinck d. Sergei Winogradsky