Pheromones are
a. used in nonvocal communication.
b. found only in the invertebrates.
c. signals to members of other species.
d. types of internal hormones that control
maturation.
e. involved only in learned behaviors.
Answer: a
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What is a gene?
A. A section of DNA that codes for a portion of a protein B. A discrete sequence of DNA nucleotides C. A section of DNA that codes for one or more proteins D. All of these and more are part of the expanding definition of a gene.
The first organisms to be bioengineered were
a. bacteria. b. viruses. c. fungi. d. protozoans. e. algae.
Brain cortices are important for the execution of a particular task within a specific lobe (i.e. the primary motor cortex initiates movement within the frontal lobe). However, brain areas are necessary for integrating information from different lobes. Which brain area is most responsible for the organization of movement before it is initiated?
a. Premotor area b. Supplementary motor area c. Sensory association area d. Primary somatosensory cortex
In eukaryotic cells, the 5' cap is bound to a protein complex called cap binding complex. In addition, during the splicing reaction, proteins are deposited at sites where the exons are fused together. These proteins, in combination with the cap binding complex, are essential for the recruitment of an additional complex of proteins that is essential for mRNA export from the nucleus to the cytoplasm. This complex is called the transcription-export, or TREX, complex. Taking this into account, would an mRNA encoded by a virus infecting a eukaryotic cell need to bind to the TREX complex?
A. No, only eukaryotic mRNAs are modified, and therefore viral mRNAs do not need to bind to the TREX complex. B. No, mRNAs encoded by viruses infecting eukaryotic cells can be translated in the nucleus of these cells. C. Yes, mRNAs encoded by viruses infecting eukaryotic cells would need to bind these complexes to allow RNA processing events to occur. D. Yes, mRNAs encoded by viruses infecting eukaryotic cells would still need to move from the nucleus to the cytoplasm to be translated.