1.5 Nucleic Acids
in AP Biology
Nucleic acids are polymers made of monomers called nucleotides. Nucleic acids store, transmit, and help express hereditary information.
1.4 Protein
in AP Biology
Proteins are all constructed from the same set of 20 amino acids, linked in unbranched polymers. The bond between amino acids is called a peptide bond, so a polymer of amino acids is called a polypeptide. A protein is a biologically functional molecule made up of one or more polypeptides, each folded and coiled into a specific threedimensional structure.
1.3 Carbohydrates and Lipids
in AP Biology
Carbohydrates include sugars and polymers of sugars. The simplest carbohydrates are the monosaccharides, or simple sugars; these are the monomers from which more complex carbohydrates are built. Disaccharides are double sugars, consisting of two monosaccharides joined by a covalent bond. Carbohydrate macromolecules are polymers called polysaccharides,composed of many sugar building blocks. Lipids are the one class of large biological molecules that does not include true polymers, and they are generally not big enough to be considered macromolecules.
1.2 Structure of Water and H Bonding
in AP Biology
Water (H2O) is made up of two hydrogen atoms covalently bound to an oxygen atom. While this bonding involves the sharing of electrons, they are not shared equally. The oxygen atom, having more protons (+ve), attract the electrons (-ve) more strongly (i.e. the oxygen has a higher electronegativity). Thus the oxygen atom becomes slightly negative and the hydrogen atoms become slightly positive
1.1 Elements of Life
in AP Biology
Matter is made up of elements. An element is a substance that cannot be broken down to other substances by chemical reactions. Of the 92 natural elements, about 20–25% are essential elements that an organism needs to live a healthy life and reproduce.
Changing Expectations
Repost from BBJ’s blog
Remember, always maintain your passion for your inner yearning and devote time to it.
Mc.Rojigally-Pros别具一格的生日会
我经常幻想着等到我们毕业了，对比每次生日板报更新的有趣的内容，脑海里重现当时班里流行的“热梗”，那将会是一件多么幸福的事情。
syk学年总结
作者： Sophia
阳光正灿烂，大胆的走你的路就好了！
iGEM Reflections
in BioCommunity
iGEM is not only an academic assessment and training, but it will also bring you comprehensive growth. I hope everyone can embrace the mindset of “the more difficult it is, the more we should try.” Only by trying and experiencing can we achieve growth.
Written by Tengyu Zhang
一年
作者： Cliff，转载自生物探索太空站公众号
一年过去啦。
在北中度过的第一年。
2023年8月我们首次见到各位。