|
| 1 |
Go |
Q:
|
Which waste product of a grasshopper may be retained and used in other metabolic activities? |
|
A
|
water |
B
|
uric acid |
C
|
carbon dioxide |
D
|
feces |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 3 |
Go |
Q:
|
Metabolically, the addition of hydrogen atoms to a molecule is associated with: |
|
A
|
oxidation |
B
|
reduction |
C
|
decarboxylation |
D
|
condensation |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 4 |
Go |
Q:
|
In humans, proline can be synthesized from glutamate which in turn can be derived from α-ketoglutarate. It can therefore be concluded that: |
|
A
|
proline is necessary for the Krebs cycle. |
B
|
glutamate and proline play similar roles in proteins. |
C
|
proline production is an irreversible reaction in the body. |
D
|
proline is not an essential amino acid in humans. |
|
|
|
Tags:
Citric Acid Cycle | Miscellaneous Biochemistry | |
|
| 5 |
Go |
Q:
|
Shortly after administration of a drug, its concentration in the blood is 935 μg/L. If the drug elimination follows first order kinetics with a half life of 9 hours, approximately what should the concentration in the blood be after 3 hours? |
|
A
|
850 μg/L |
B
|
740 μg/L |
C
|
470 μg/L |
D
|
510 μg/L |
|
|
|
Tags:
Miscellaneous Biochemistry | Chemical Kinetics | |
|
| 6 |
Go |
Q:
|
Which of the following best characterizes the difference between NADH and NADPH? |
|
A
|
NADH is generally used for catabolic pathways while NADPH is generally used for anabolic pathways. |
B
|
NADH is reduced while NADPH is oxidized. |
C
|
NADH is produced in the Krebs cycle while NADPH is produced in glycolysis. |
D
|
NADPH is used in phosphorylation reactions while NADH is used in dephosphorylation reactions. |
|
|
|
Tags:
Glycolysis, Gluconeogenesis, PPP | Miscellaneous Biochemistry | |
|
| 7 |
Go |
Q:
|
Which of the following would proceed according to first order kinetics assuming an elementary reaction? |
|
A
|
Linearized glucose becoming cyclized in solution. |
B
|
Glucose and fructose being converted to sucrose by sucrose synthase. |
C
|
The synthesis of glucose-6-phosphate from glucose and ATP. |
D
|
The conversion of glyceraldehyde-3-phosphate and dihydroxyacetone phosphate to fructose bisphosphate. |
|
|
|
Tags:
Chemical Kinetics | Miscellaneous Biochemistry | |
|
| 8 |
Go |
Q:
|
Proteases cleave which of the following types of bonds? |
|
A
|
glycosidic bond |
B
|
amide bond |
C
|
phosphodiester bond |
D
|
ester bond |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 10 |
Go |
Q:
|
A reaction occurs in a vessel but it is unclear to researchers whether the reaction is driven by enzymes or simply proceeds under ambient conditions. Which of the following provide the best evidence that the reaction is enzymatic? |
|
A
|
When the vessel is heated to 85 °C, the reaction stops. |
B
|
When the vessel is rapidly heated and then cooled back to its original temperature, the reaction no longer proceeds. |
C
|
When one of the reactants is removed, the reaction stops. |
D
|
When the pH is dropped, the reaction proceeds. |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 11 |
Go |
Q:
|
Amino acids typically exist in the L-stereoisomer. Which of the following amino acids does not contain any enantiomers? |
|
A
|
alanine |
B
|
asparagine |
C
|
glycine |
D
|
histidine |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 12 |
Go |
Q:
|
Sulfide bonds are quite important in biological processes throughout the body. Which of the following amino acids typically provide a source of sulfur for these various processes? |
|
A
|
glutamic acid |
B
|
aspartic acid |
C
|
isoleucine |
D
|
cystine |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 13 |
Go |
Q:
|
Cells often contain transmembrane proteins, such as G-protein receptors and other cell-signaling molecules. The transmembrane portions of these proteins typically contain hydrophobic amino acid residues. Which amino acid may be expected to be found in such a transmembrane portion? |
|
A
|
tyrosine |
B
|
threonine |
C
|
isoleucine |
D
|
asparagine |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
| 14 |
Go |
Q:
|
Which of the following is expected to occur for a DNA strand when slowly heated? |
|
A
|
A-T bonds break prior to C-G bonds |
B
|
C-G bonds break prior to A-T bonds |
C
|
All nucleotide bonds break at the same temperature |
D
|
Bonds break dependent on local interaction forces but are not dependent on nucleotide bonding |
|
|
|
Tags:
Miscellaneous Biochemistry | |
|
|
Questions? We're here to help!
Ask Us
|
