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?
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
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