QUIZ: Chemistry for Biology

Directions: This is a take home quiz that will not be graded. The purpose of this quiz is to help you to succeed on exams in this course. Please completely answer each of the following questions.

1) The element Magnesium (Mg) has an atomic number of 12 and an atomic weight of 24.305. Calculate the following and SHOW your calculations:

a) Number of protons

b) Number of electrons

c) Mass number

d) Number of neutrons

2) Sodium is atomic number 11 and is in Group 1A. How many electrons are in a sodium atom’s outermost shell? EXPLAIN.

3) Identify two different properties of water and EXPLAIN why they are important in the human body.

4) A solution has a starting pH of 3.0. After some chemicals are added, it’s final pH changes to 5.0. Answer the following:

a) was the starting solution acidic or basic?

b) was the final solution (more/less) (acidic/basic) than the starting solution?

c) What factor specifically changed from start to finish and by how much?

5) Put the following in order from SMALLEST to LARGEST:

a) Proton

b) Protein

c) Amino acid

d) Atom

e) Polypeptide

6) Explain how glycogen is structurally different from glucose.

7) Explain what an enzyme is and how it functions. Is it correct to say that an enzyme is not consumed in a chemical reaction? EXPLAIN.

8) Explain the structure of an ATP molecule. Explain what is ATP hydrolysis and why is it important to the human body?

9) What is a peptide bond? In what type of macromolecule is it found?

10) Compare and contrast an ionic bond to a hydrogen bond. How are they alike? How are they different?