What is the likely consequence of a mutation that alters the branch point within an intron?
A. failure of snRNPs to recognize the 5' end of intron
B. failure of snRNAs to combine with protein and form snRNPs
C. failure to form a lariat
D. no exon shuffling
E. no effect, since introns are not expressed
Answer: C
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Which of the following is likely NOT a common feature shared among all living organisms?
A. All living organisms use energy. B. All living organisms maintain organization. C. All living organisms have evolved over the course of many generations. D. All living organisms maintain some level of homeostasis. E. All living organisms are composed of similar structures.
Interstitial fluid enters the lymphatic capillaries:a
by diffusion. b. by pinocytosis. c. through pores in the lymph vessel walls. d. due to the hydrostatic pressure of blood. e. through slit-like openings between endothelial cells.
Red tide is the result of an elaborate "bloom" of protozoans.
a. true b. false
A pregnant woman goes to her obstetrician for her first ultrasound. After the exam is over, the doctor remarks, "It looks like the ribs are still developing, and I might even have seen some tiny fingers and toes." How many weeks pregnant is this woman?
A) less than 5 weeks B) between 5 and 8 weeks C) between 8 and 14 weeks D) more than 14 weeks