Which of the following is not associated with mRNA processing in eukaryotes?
A) addition of a 5' methyl guanosine cap
B) 3' polyadenylation
C) removal of introns
D) removal of exons
E) removal of exons and introns
Answer: D
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Various modifications in leaves can make plants better adapted to their habitats. Which of the following is not an evolutionary modification of leaves?
A. floral leaves B. fruit-bearing leaves C. spines D. reproductive leaves E. insectivorous leaves
The buttery, edible flesh that encloses the large seed of an avocado is tissue of the ____
a. microspore b. ovule c. ovary d. cotyledon e. pollen
Crosses between a yellow rat with a yellow rat always produce yellow. Crosses between a white rat
with a white rat always produce white. The alleles affect the same aspect of coat color. The crosses of a white with a yellow produce a cream. What happens if you cross two creams? What will be an ideal response?
Action potentials in muscle fibers cause
a. the sarcoplasmic reticulum to release ATP. b. the sarcoplasmic reticulum to release calcium. c. myosin-actin bonds to break. d. the energizing of myosin molecules. e. all of these to occur.