Using the amino acid tryptophan. Under low glucose conditions, describe the fate of the carbons and of the amino group in either the LIVER OR SKELETAL MUSCLE. Start your answer at the point at which a familiar metabolite or metabolites are produced in the reactions. Your answer should include a description of one way tryptophan could enter the urea cycle and what pathway the carbons will enter in any organ of your choosing.

2. Glycoproteins _______.

a. contain unbranched oligosaccharides

b. are small fraction of the total number of protein in a human cell

c. are always intracellular

d. have oligosaccharides covalently attached to aspartate residues

3. Oligosaccharides are _______.

a. are found in bacterial lipopolysaccharides

b. never found in mucins

c. never attached to hormones

d. classified as N- or O-linked when found in gangliosides

4. Lectins are found _______.

a. onliy in eukaryotes

b. only in blood

c. on the surface of hepatocytes

5. Lectins _____.

a. bind their ligands with relatively low specificity

b. prevent viruses from binding to their target cells

c. bind their ligands via multiple weak interactions

6. The _____ does not need to be determined in fully characterizing oligosaccharides and polysaccharides found in glycoproteins.

a. location of branch points

b. a-versus-B conficurations of linkages

c. amino acid sequence of the protein

d. sequence of monosaccharides

7. Cyclization of monosaccharides _______.

a. is irreversible

b. creates a and B epimers

c. is the reactionwhich forms hemiketals or hemiacetals

d. only accurs in hecoses

Write the two chemical reactions that are coupled in step 3 of glycolysis and label each as exergonic or endergonic.
(Write your reactions using words, accepted acronyms or symbols for reactants and products)

How do you know if the reaction is exergonic or endergonic

write a balanced equation for HMP pathway whereby Fruc-6-P and Gly 3-P generated by each passage through HMP is catabolized by glycolysis and TCA cycle to NADH and CO2?
(minimum input will be three glucose-6-p)

What goes on between glycolysis and the citric acid cycle? What are the reactants and products of this process if cellular respiration started with 1 glucose molecule. What are the reactants and products of the citric acid cycle if cellular respiration started with 1 glucose molecule?

Glycolysis and fatty acid oxidation are both affected by the [NADH]/[NAD+] ratio in the cell. If the conditions inside a cell are such that [NADH] >>[NAD+] what will be the effect on both pathways? Be sure to explain the direct connection between [NADH] and specific reactions in these and related pathways.

In Glycolysis, fructose-6-phosphate is converted to fructose-1,6-biphosphate by phosphofructokinase. How many of the following statements are true? this step is reversible this step is a point of control it is activated by ATP only fructose1,6-biphosphate is committed to become pyruvate and yield energy

Which of the following involve glycolysis, the TCA cycle, and electron transport chain?

Which of the following processes are involved in the regeneration of the NAD+ pools? MARK ALL CORRECT ANSWERS.

Fermentation

Glycolysis

Pyruvate Oxidation

Pyruvate Reduction

Citric Acid (TCA) cycle

Anaerobic Respiration

Aerobic Respiration

Electron Transport Chair

Chemiosmosis