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What is transcription?

Transcription is the formation of an mRNA molecule from its complementary DNA template. First the enzyme DNA helicase unwinds the double helix, and the hydrogen bonds between complementary bases break. This ...
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Answered by Katherine F. • Biology tutor
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How do auxins bring about positive phototropism in plants?

Phototropins are enzymes found in the plasma membrane of particular cells. They are phosphorylated when hit by blue light. 2) This phosphorylation triggers the movement of auxin across the plant shoot by act...
KF
Answered by Katherine F. • Biology tutor
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What are the stages of mitosis?

Mitosis consists of four basic phases. 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase It is a common mistake to believe that interphase is part of mitosis. In fact, interphase is just a preparation stage ...
JJ
Answered by Josh J. • Biology tutor
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What bonds are present in each type of structure of a protein?

PRIMARY PROTEIN STRUCTURE This is the sequence of amino acids in a polypeptide chain. These are bonded together by strong covalent bonds . SECONDARY PROTEIN STRUCTURE The secondary structure is the shape tha...
JJ
Answered by Josh J. • Biology tutor
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Describe the role of lipids.

Lipids are a great energy reserve in both plants and animals . This is due to the greater number of carbon-hydrogen bonds present in comparison to carbohydrates. It also acts as an insulator against heat los...
JJ
Answered by Josh J. • Biology tutor
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