When is a eukaryotic mRNA ready for transport from the nucleus?
What will be an ideal response?
Ans: To be export competent, an mRNA must be fully processed and be associated with appropriate protein complexes. The latter includes regulatory proteins and the TREX complex that allows transport across a nuclear pore.
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A __________ is a confined fluid upon which muscle contractions act. What will be an ideal response?
Two species of plants that both use honeybees as pollinators but reproduce at different times of the year-one spring, the other midsummer-demonstrate geographic isolation
Indicate whether the statement is true or false
The fusion of gametes during fertilization restores the ____________________ number of chromosomes Fill in the blank(s) with the appropriate word(s)
Mesophyll cells are:a
arranged tightly together. b. separated by intercellular spaces.
c. responsible for the opening and closing of stomata. d. devoid of chloroplasts. e. covered by a waxy cuticle, which they secrete