You are testing a new chemotherapy drug that blocks a kinase in the cytoplasm that helps carry signals to the nucleus causing the cell to divide. If you expose cells to the drug at the same time you administer a hormone that should cause the cell to divide, which of the following steps would be blocked?
_____ Receptor activation
_____ Signal transduction
_____ Activation of transcription factors
_____ Cell division
_____ Receptor activation
__X__ Signal transduction
__X__ Activation of transcription factors
__X__ Cell division
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The fusion of a male gamete with a female gamete is called
A. syngamy. B. meiosis. C. mitosis. D. recombination. E. synapsis.
Chimpanzees are considered to be our closest extant relative because
A. they have prehensile tails. B. their genome is 99% identical to the human genome. C. their upper/lower limbs equally account for bearing the body weight. D. they have flat, spreading noses. E. they are a highly social species.
Algae that are important sources of thickening agents like agar are known as
A. Rhodophyta. B. Phaeophyta. C. Chrysophyta. D. Rhizobium. E. Chlorophyta.
List the four kingdoms of life that are classified under the domain Eukarya and indicate the key features of each.
What will be an ideal response?