c03a04 Protein Structure

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Your LAST Name: *

1. In the following diagram of a portion of a polypeptide, label the types of interactions that are shown. *

4 points

disulfide bridge

ionic bond / acid-base interaction

hydrophobic interactions and van der Waals interactions

hydrogen bond

2. What level of protein structure are these interactions producing? *

1 point

secondary

tertiary

primary

quaternary

3. The process by which protein conformation is lost or broken down is *

1 point

denaturation

protein synthesis

translation

hydrolysis

dehydration synthesis

4. You're the manager of a factory that produces enzyme-washed blue jeans (the enzymes lighten the color of the denim, giving a faded appearance). When the most recent batch of fabric came out of the enzyme wash, however, the color wasn't light enough to meet your standards. Your quality control laboratory wants to do some tests to determine why the wash enzymes didn't perform as expected. Which hypothesis is most likely to be productive for their initial investigation? *

1 point

The polysaccharides in the enzymes may have separated in the wash.

The three-dimensional structure of the proteins may have been altered.

The dye in the fabric may have hydrolyzed the fatty acids in the enzymes.

The nucleotide chain of the enzymes may be incorrectly formed.

5. You're the manager of a factory that produces enzyme-washed blue jeans (the enzymes lighten the color of the denim, giving a faded appearance). When the most recent batch of fabric came out of the enzyme wash, however, the color wasn't light enough to meet your standards. Your quality control laboratory wants to do some tests to determine why the wash enzymes didn't perform as expected. Based on your understanding of enzyme structure, which of the following would you recommend that they also investigate? *

1 point

The temperature of the liquid in the washing vat.

The pH of the liquid in the washing vat.

The manufacturer of the fabric.

both choice 1 and 2

6. Which two functional groups are always found in amino acids? *

1 point

ketone and amine

carboxyl and amine

carbonyl and carboxyl

alcohol and aldehyde

amine and sulfhydryl

7. Which functional group contains sulfur? *

1 point

sulfhydryl

amine

alcohol

carbonyl

carboxyl

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