What is the difference between Ras and the G proteins bound to G protein coupled receptors (GPCRs)?
A. Ras is an enzyme and the G proteins bound to GPCRs are not enzymes.
B. Ras is a second messenger and the G proteins bound to GPCRs are not second messengers.
C. Ras is a small G protein and the G proteins bound to GPCRs are not small G proteins.
D. Ras can activate different effector molecules and the G proteins bound to GPCRs cannot activate
different effector molecules.
C. Ras is a small G protein and the G proteins bound to GPCRs are not small G proteins.
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True or false: although monosaccharides can exist in linear form, virtually all cellular monosaccharides are found in circular form
A. true B. false
Your instructor wants you to bring in an example of a biofilm to your lab. Which choice is the best selection for bringing in an intact biofilm for further study?
A. Disconnecting and bringing in the old, mildewed showerhead from the showers in your dorm B. Scraping the mold off of the shower curtain in your dorm's bathroom into a paper cup using a butter knife C. Using a toothpick to scrape plaque off of your teeth and smearing it onto a slide to bring in to lab D. Wiping a sponge across a slimy boulder in a stream in a nearby park and bringing it in to lab
Which pertains to DNA but not to RNA?
A. Contains adenine B. Contains uracil C. Contains nucleotides D. Contains thymine E. Contains ribose
Maternal inheritance patterns from generation to generation cannot be analyzed by simply studying the X chromosome in the way that paternal inheritance patterns can follow the Y chromosome because
A) the X chromosome is too large to analyze effectively. B) the X chromosome sometimes exchanges genetic information with the Y chromosome. C) the X chromosome is obtained from both the father and the mother. D) one X chromosome is deactivated in females.