Which of the following is part of the brain?
A) thymus
B) hypothalamus
C) adrenal cortex
D) thyroid
B
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Before ARF transcription factors can trigger auxin-induced gene expression, what must happen?
A. Auxin binds to ubiquitin, a degradation tag. B. Auxin degrades Aux/IAA proteins which repress ARF transcription factors. C. Auxin binds to TIR1, an auxin receptor. D. Auxin must bind to the ARF transcription factor. E. Ubiquitin must destroy TIR1 to release Aux/IAA proteins.
Evidence that sleep has an inherited component is that
A) MZ twins share more sleep characteristics than do DZ twins. B) siblings often go to sleep and wake up at the same time. C) people with insomnia have the same chromosome abnormality. D) DZ twins share more sleep characteristics than do MZ twins.
The type of viral infection in which a virus enters a host cell and remains dormant in the host cell's chromosome is
A. a rare form of viral infection. B. a transgenic infection. C. a lytic infection. D. a systematic infection. E. a lysogenic infection.
Which term refers to growing useful mutants that develop from callus culture?
a. grafting b. protoplast fusion c. fragmentation d. somatic embryogenesis