Addition of a poly(
A) tail to an mRNA molecule ________.
A) allows the mRNA to be recognized by ribosomes during translation
B) allows mRNA molecules to be more stable in the cytoplasm
C) results in removal of introns
D) only occurs in bacteria
E) is an important step in translation
B
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Griffith first proposed the "transformation principal" through his studies on Streptococcus pneumoniae bacterium. Which of the following molecules was later found to be responsible for this phenomenon?
A. protein. B. RNA. C. DNA. D. phage. E. bacteriophage.
Which of the following is NOT true of CAM
plants?
a. they are most like C4 plants in their photosynthetic metabolism b. the light-independent reactions begin at night c. they fix carbon only during the night d. they include the cacti and succulents e. they use rubisco
When a plant responds to external stimuli, such as light, gravity, or touch by directional growth, these responses are
referred to as: a. turgor movements. b. sleep movements. c. nastic movements. d. circadian rhythms. e. tropisms.
A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a ________.
Fill in the blank(s) with the appropriate word(s).