Answer:
All biological drawings should be titled. Shading specific areas of a diagram might look aesthetic to the eye, but this practice is not acceptable in biology. Hence, the advice is to AVOID at all cost.
Explanation:
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The best answer is D.
Carbon has an affinity for bonding with other small atoms including other carbon atoms, via the formation of stable covalent bonds.
In spite of the fact that carbon is present in a vast number of compounds, carbon is weakly reactive compared to other elements.
It has the ability to form very long chains of strong and stable interconnecting C-C bonds. This property allows carbon to form an almost infinite number of compounds. There are more known carbon-containing compounds than all the compounds of the other chemical elements combined except those of hydrogen because almost all organic compounds contain hydrogen as well.
The physical barrier that the mRNA must pass is the nuclear membrane.
The process of gene expression involves two main stages; transcription ; the production of messenger RNA by the enzyme RNA polymerase, and the processing of the mRNA molecule. Then the process of translation which takes place outside the nucleus, therefore the mRNA must cross the nuclear membrane to enter the cytoplasm.
