Cell and molecular
*ANSWER ALL
1. Isotopes of carbon such aa carbon-12 and carbon-13 differ only in the number of _____ in the atoms nucleus.
2. What is the term for the functional group in the side chain of glumatic acid?
3. The building blocks of carbohydrates, lipids, proteins, and nucleic acids join through a process known as a ______ reaction.
4. The amino acids glutamine acid differ only in the structure of their side chains. At pH 7, glutamic acid can participate in molecular interactions that are not possible for glutamine. What types of interaction are these? Covalent bonds Hydrogen bonds Ionic bonds Hydrophobic bonds
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For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. Proteins are ______________ built from amino acids, which each have an amino group and a _____________ group attached to the central _______________. There are twenty possible _______________ that differ in structure and are generally referred to as รขยยR.รขยย In solutions of neutral pH, amino acids are _______________, carrying both a positive and negative charge. When a protein is made, amino acids are linked together through _______________, which are formed by condensation reactions between the carboxyl end of the last amino acid and the ___________________ end of the next amino acid to be added to the growing chain.
| a: amino | b: ionized | c: polypeptides |
| d: alpha-carbon | e: length | f: protein |
| g: carbon | h: noncovalent | i: R group |
| j: carboxyl | k: peptide bonds | l: side chains |
m: hydroxide
