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Describe the properties of primary protein structure.

The main component of primary protein structure is that it is composed of amino acids. The amino acids are connected via covalent chemical bonds more specifically called the peptide bond. Amino acids joined ...
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Answered by Alysha V. • Biology tutor
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Molecules of hydrogen chloride, HCl, and molecules of fluorine, F2, contain the same number of electrons. Hydrogen chloride boils at –85 °C and fluorine boils at –188 °C. Explain why there is a difference in the boiling points of HCl and F2.

F2 has temporary dipole-dipole interactions known as van der Waals’ forces. Whilst HCl has permanent dipole-dipole interactions. The intermolecular forces in HCl are stronger than that in F2 (permanent dipol...
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Answered by Freddie G. • Chemistry tutor
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Compare and contrast the following two poems

Stages when confronted with this question: 1. Read both poems multiple times (at least 3 times each) 2. Use highlighters to higlight interesting imagery, syntax, diction, rhyme scheme, rhythm etc. 3. It is i...
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Explain what happens in the body when a Polio vaccine is administered.

The vaccine contains a weakened or inactivated form of the virus. The viral particle displays an antigen on its surface specific to poliovirus. Once in the blood, a specific helper T cell will detect the ant...
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Answered by Freddie G. • Biology tutor
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Q: At the end of Seamus Heaney's ‘Digging’, why does the speaker say he is going to dig with his pen?

To understand the ending of this poem, we should keep in mind that the speaker says he is going to dig with his pen and return to the beginning. In between these first and last stanzas, the pen is never ment...
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Answered by Alexander M. • English tutor
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