Which mRNA modification is likely absent if the mRNA is degrading prematurely from the 5? end of the mRNA?
A) removal of introns
B) RNA editing
C) addition of the 7-methylguanosine cap to the 5? end
D) addition of the 3? polyadenylated tail
E) splicing together of exons
Answer: C
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The term gymnosperm literally means
A. naked ovule. B. clothed ovule. C. naked seed. D. clothed sperm. E. clothed seed.
Exposure to a light source ____
a. increases melatonin levels b. increase testosterone levels c. decrease testosterone levels d. is used to treat SAD and jet lag e. is used to treat some cancers
Which feature of the mammalian skeleton provides an advantage for animals that are land-based predators?
A. Elongated hindlimbs that propel them forward. B. Long legs and running on the tips of elongated phalanges. C. Bipedal locomotion on the soles of the feet. D. Walking on their toes. E. All of these are advantages for land-based predators.
Which of the following supports the idea that all organisms share a common ancestry?
A) All cells have a similar biochemistry, including amino acids, nucleic acids, and ATP. B) All cells use the same collection of lipids. C) All cells use amino acids as a carrier of genetic information. D) All cells use DNA as a cellular energy carrier. E) All cells use ATP as the template for protein synthesis.