Exam 2: Chemical Principles

Table 2.1 -Using the information in Table 2.1, calculate the molecular weight of ethanol, C₂H₅OH.

A basic solution is expected to contain more hydrogen ions than hydroxyl ions.

Starch, dextran, glycogen, and cellulose are polymers of

Any compound that contains carbon is only considered to be organic.

Which are the primary molecules making up plasma membranes in cells?

A scientist claims that when a protein is denatured, it can be expected that its secondary structure will more likely be retained when compared to all other levels of protein structure structures. Do you agree? Explain.

If an amino acid contained a hydrocarbon as its side group, in which of the following categories could it be appropriately designated?

Radioisotopes are frequently used to label molecules in a cell. The fate of atoms and molecules in a cell can then be followed. Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the radioisotope ³⁵S. After a 48- hour incubation, the ³⁵S would most likely be found in the S. cerevisiae's

Figure 2.1 -Which compound in Figure 2.1 is an organic acid?

Figure 2.3 -What kind of bond is at the arrow in Figure 2.3?

Which type of molecule contains - NH₂ groups?

Which molecule is composed of a chain of amino acids?

Compare a molecule of a nucleotide to ATP. Could a cell simply insert ATP into DNA without altering it? Explain.

What is the type of bond between the hydrogen of one molecule and the nitrogen of another molecule?

Which of the following is a base?

Individual covalent bonds are stronger than individual ionic bonds.

Two glucose molecules are combined to make a maltose molecule. What is the chemical formula for maltose?

The formation of ADP from ATP can be defined as a hydrolytic reaction.

If you viewed one single protein using a microscope, you would observe multiple structures.

Identify the following reaction: HCl + NaHCO₃ -NaCl + H₂CO₃