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Describe the structure of the cell membrane.

The cell membrane is a fluid matrix made of a phospholipid bilayer. Each lipid molecule has a hydrophilic, phosphorylated "head" and a hydrophobic, fatty acid "tail". The hydrophobic part...
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Answered by Srishti N. • Biology tutor
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What motivations informed US foreign policy during the Cold War?

The question can be answered from three different historical perspectives: the orthodox, the revisionist, and the post-revisionist. The orthodox account blames the expansionary tendencies of the Soviet Union...
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Answered by Kaia K. • History tutor
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Where is the position of a verb in a sentence?

Verbs in a sentence are called Pr ädikate . The position of the Prädikat depends on whether we have a verb consisting of one, two or three parts . If a verb has one part, it takes the second position . This ...
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Answered by Sarah S. • German tutor
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What is an allele? What are dominant and recessive alleles?

The nucleus of a cell contains DNA molecules, which code for proteins. In humans, DNA is arranged into 46 linear, double-stranded molecules called chromosomes. Chromosomes of similar length are paired up – f...
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Answered by Christina T. • Biology tutor
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What's the difference between 'por' and 'para'?

'Por' and 'para' convey very different meanings in Spanish and using one instead of the other can change the whole meaning of the phrase. For example:- Trabaja para Carmen - She works for Carmen (i.e. Carmen...
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Answered by Genevieve P. • Spanish tutor
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