Exam 14: Proteins

Glycogen phosphorylase breaks down glycogen in the liver to produce glucose-1-phosphate. The activity of this enzyme increases in the presence of AMP. AMP is therefore a negative effector in controlling this pathway.

Which of the following statements does not characterize coenyzmes?

Consider the following representation of an enzyme-catalyzed reaction. This image could represent the reaction in which lactase catalyzes the hydrolysis of lactose (a disaccharide)into glucose and galactose (two monosaccharides). Fill in the blanks with the appropriate letter (A,B,C,D,....)from the image. -___________________ represents lactase.

Albumin is a protein found in blood.

Consider the following image. The " ? " in the image represents

Consider the two "peptides" shown below. Ala-Gly-Phe-Phe-Ala-Gly-Val Val-Leu-Iso-Ala-Gly-Val-Phe The side chains of these two "peptides" could form hydrophilic interactions with one another.

An enzyme found in the blood would be expected to have maximum activity at a pH

The secondary structure of proteins is stabilized by covalent bonds.

Consider the structure shown below. Fill in the blanks with an integer (1,2,3,4,5....)as shown in the diagram or to represent a specified number. -A hydrophilic side chain is indicated by the number__________________.

Which type of protein has the most compact structure?

The following represents the results of an experiment on a metabolic enzyme. What is the optimum pH of this enzyme?

The reaction given below would be classifed as:

Consider the structure shown below. Fill in the blanks with an integer (1,2,3,4,5....)as shown in the diagram or to represent a specified number. -The atom represented by the number ____________________ could act as a proton acceptor in the hydrogen bonding present in an alpha helix.

If an amino acid contained the following side chain would be classified as hydrophobic.

Consider the tertiary structure of a protein containing two peptides with the segments shown below. What types of interactions would be possible?

What class of protein is represented by the following?

Consider the following representation of an enzyme-catalyzed reaction. This image could represent the reaction in which lactase catalyzes the hydrolysis of lactose (a disaccharide)into glucose and galactose (two monosaccharides). Fill in the blanks with the appropriate letter (A,B,C,D,....)from the image. -The enzyme-substrate complex is represented by __________________.

The ultimate fate of the nitrogen from the metabolism of amino acids in mammals is:

Consider the structure shown below. Fill in the blanks with an integer (1,2,3,4,5....)as shown in the diagram or to represent a specified number. -The free carboxylate group is represented by the number _____________________.

A month after Micah's fourth birthday, his mother notices that Micah's eyes seem puffy and his ankles look swollen. Over the next couple of weeks, Micah's feet and ankles continue to swell and he seems to be short on energy, so his mother takes him to the local clinic. The nurse practitioner orders several lab tests, including a measurement of the concentration of albumin in Micah's blood and urine. a.) Is it normal to exhibit increasing puffiness, also known as edema, around the eyes, ankles, and feet? Why or why not? b.) Micah's urine test results showed significant amounts of albumin. Why would this be of concern? c.) Given Micah's significant amount of proteinuria/albuminuria, why would his serum blood level of albumin be significantly lower than usual?