Antigen receptors can directly connect to signal transduction pathways because immunoglobulins and TCRs have very small cytoplasmic domains
Indicate whether the statement is true or false.
Answer: FALSE
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A pro- strain of bacteria, which has not been in contact with any other strains, develops the ability to produce the amino acid proline. This mutant "rescue" could have been caused by
A. addition of the pro+ gene via transduction. B. mutation of the pro- gene during phage integration. C. removal of the pro- gene during excision. D. addition of the pro+ gene via transformation. E. correction of the pro- gene by reverse transcriptase.
A human cell has a mutation in the gene that encodes the enzyme that generates lactate from pyruvate, rendering that enzyme completely non-functional. Assuming that there is ample glucose present, how would this cell generate energy in the presence of oxygen?
A. Primarily through the break down of proteins into amino acids B. Glycolysis coupled with ethanol fermentation C. Aerobic respiration D. This cell would have no way to generate energy under these conditions because it cannot carry out the reactions needed for glycolysis
As a group, fungi are _____.
a) photoautotrophs b) decomposers c) herbivores d) carnivores e) chemoautotrophs
The enzyme that digests protein is ____.
A. ghrelin B. chyme C. pepsin D. sulfuric acid E. lipase