Bio - Cells

Chemistry questions
COPY AND PASTE INTO A WORD DOCUMENT 1. What information would you need to calculate the atomic mass of an atom? The atomic number, the number of neutrons and add the numbers together. This is the atomic mass. 2. What information would you need to determine the atomic number of an atom? The number of protons in the nucleus of the atom. 3. Chlorine (Cl) has 17 electrons, 17 protons, and 18 neutrons what is the atomic mass of Cl? 34 4. What is the charge of the above Cl atom? Neutral If it gains one electron and now has 18 electrons what will the charge be? Negative 5. pH measures the concentration of which type of ions in a solution? Hydrogen 6. Refer to the periodic table of the elements in the appendix of your textbook. What is the name of the element with the following atomic abbreviation, Mo? Molybdenum. How many protons and neutrons does an atom of this element have? 42 7. Which elements are commonly associated with each of the four macromoleces? Carbohydrates Lipids Protiens Nucleic acids
Always contain P No No No Yes
Generally contain no P Yes Yes Yes No
Always contain N No No Yes Yes
Generally contain no N Yes Yes No No
Frequently contain S No No Yes No
Generally contain no S Yes Yes No Yes

8. How are amino acids linked together to form polypeptides or proteins? Chains of amino acids link together to form a peptide bond. Bonds with 100 or more amino acids are