In yeast, there are three gene products required to synthesize the amino acid lysine. You cross two haploid lysine auxotrophs to form a diploid. The diploid fails to grow on plates lacking lysine. Which of the following can you conclude?
A) The haploid strains have mutations in the same gene.
B) The haploid strains have mutations in different genes.
C) The haploid strains form a complementation group.
D) The haploid strains do not complement each other.
E) Both (A) and (D) are true.
E
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Why are the chances of an immune response in a patient given between 10 µg and 1g of an immunogen (drug) higher than a patient given higher than 1g or lower than 10 µg of the same drug?
What will be an ideal response?
How does the action of exocytosis by dendritic cells and macrophages differ from that of neutrophils?
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Some viruses cause disease; they act as __________ in humans. Fill in the blank(s) with the appropriate word(s)
Messenger RNA is formed by _____ of a gene on the DNA template strand.
A) replication B) transformation C) transcription D) translation