Each T cytotoxic cell expresses CD8 and 50,000 identical T cell receptors on its surface. Indicate whether the statement is true or false
True
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An advantage of sexual reproduction is:
a. a large number of offspring. b. genetically diverse offspring. c. offspring that are specially adapted to the stable environment of their parents. d. offspring that are genetically identical to the parents.
Two or more alleles of a gene are circulating at relatively high frequency in a population's gene pool. What term describes this state?
a. frequency-dependent selection b. polyploidy c. multiple allele systems d. balanced polymorphisms e. prominent alleles
During the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate and phosphoenolpyruvate, a phosphate group is added to ATP to generate ATP. The mechanism for ATP production in this reaction is
A) substrate-level phosphorylation. B) product-level phosphorylation. C) oxidative phosphorylation. D) anabolic phosphorylation. E) aerobic phosphorylation.
The form of DNA that is believed to be most biologically significant is ________
A) D-DNA B) Z-DNA C) E-DNA D) A-DNA E) B-DNA