Answer:
Transcription, mRNA (processing, transport, localization and stability), translation.
Explanation:
- Transcription is regulated in two levels, though chromatin regulation (methylation and acetylation) to loose or increase histone's affinity to DNA and through cis and trans elements such as promoters, enhancers, and silencers (cis) to active/deactivate and RNA polymerase and transcription factors and co-factors (trans).
- mRNA can be regulated using poly-A tails or 5'-caps to shorten or give them more time before they degrade, it could also be spliced to eliminate introns.
- In the translation stage, the regulation occurs during the initiation through a scanning procedure that ensures the 40s ribosomal subunit bind correctly to the untranslated portion of RNA
Hope this information is useful to you!
ANSWER: 8.9
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The human cells will lose totipotency
about 4 days after fertilization. The fertilized egg creates a single
totipotent cell called a zygote. The
zygote divides into identical totipotent cells. Approximately about 4 days, the
totipotent cells begin to specialize and becomes pluripotent.
Answer:
Water, fresher climate, not only scientific factors but also a psychological factor (nice beaches, palms, other wildlife, etc.)
