A newborn who is accidentally given a drug that destroys the thymus would most likely _____
A) lack class I major histocompatability (MHC) molecules on cell surfaces
B) lack innate immunity
C) be unable to genetically rearrange antigen receptors
D) be unable to differentiate and mature T cells
E) have a reduced number of B cells and be unable to form antibodies
Answer: D
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Future kidney cells and heart cells can differentiate into their respective specialized cell types because
A. they express a different set of genes during development B. they possess different genes C. they arise from different embryonic stem cells D. they utilize different transcription factors E. they express different genes and utilize different transcription factors during development
The chance that a future event will occur is called ____________
A. Probability B. Goodness of fit C. Degrees of freedom D. Random selection E. All of the answers are correct
Gen-Probe Mycobacterium tuberculosis direct test uses which type of nucleic acid amplification test?
a. Nucleic acid sequence-based amplification (NASBA) b. Transcription-mediated amplification (TMA) c. Reverse transcriptase polymerase chain reaction (RT-PCR) d. Standard displacement amplification (SDA)
Nondisjunction during meiosis I results in ____
a. the generation of an extra daughter cell b. a change in the status of a daughter cell from diploid to haploid c. a change in the status of a daughter cell from haploid to diploid d. one pole of the cell receiving neither member of a homologous pair of chromosomes e. a gamete that cannot fuse with another gamete