BCH4024 060925 OC Su25 E1 Q39: Which mechanism best describes how a single enzyme can switch rapidly between an active and inactive state in response to cellular signals and is illustrated by the activity of glycogen phosphorylase?

BCH4024 060925 OC Su25 E1 Q43: Carbohydrates are important molecules that are oxidized to produce energy in the cell. They have several hydroxyl and carbonyl groups that can used to generate hemi- acetals and hemiketals which are the 5 and 6 ringed cyclic forms of the sugars.  What list below best describes the following molecules?

BCH4024 060925 OC Su25 E1 Q38: Consider the following enzyme catalyzed reaction, where E1, E2,etc. represents different enzymes in a metabolic pathway. Which statement below would best explains why E1  is the regulatory enzyme?

BCH4024 060925 OC Su25 E1 Q19: A key feature of amyloid diseases such as Alzheimer’s is:

BCH4024 060925 OC Su25 E1 Q13: Determine the isolectric point(pI) of the following heptapeptide given the following pKa values. The heptapeptide protein sequence is MDIRKEN. The pKa values are: Nterm pKa 9.0, D side chain pKa 3.9, R side chain pKa 12.5, K side chain pKa 10.5 , E side chain pKa 4.2, Cterm pKa 2.0

BCH4024 060925 OC Su25 E1 Q21: Which of the following is true about chaperonins such as GroEL and GroES

BCH4024 060925 OC Su25 E1 Q4: The basic chemical unit in a cell include amino acids, monosaccharides and nucleotides. Monomeric units interact by covalent bonds to build macromolecules; these macromolecules interact to generate supramolecular complexes. What property distinguishes a supramolecular complex from a macromolecule.

BCH4024 060925 OC Su25 E1 Q48: Fatty acids (FAs) and Triacylglycerols (TAGs) are classes of lipids that play an important role in energy storage in eukaryotic organisms. The hydrocarbon chain in the tail region of both FA and TAG can be saturated or unsaturated. The degree of saturation will determine their melting point. Which statement about TAG and FA is correct?

BCH4024 060925 OC Su25 E1 Q50: Glycosphingolipids are a class of lipids with one, two or several glycans attached to a ceramide group. The regulation of these glycans on the head group of the lipid is important to the homeostasis of the cell. Which of the following best explains the accumulation of GM2 ganglioside in Tay-Sachs disease?

BCH4024 060925 OC Su25 E1 Q20: In the Anfinsen experiment, what major conclusion was deduced about protein folding?