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Recent questions and answers in Biochemistry

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1
If the dissociation constant for solute-adsorbent binding is $K_D$, the retention time of the solute in a chromatography column increases with increasing $K_D$ decreases with increasing $K_D$ passes through minimum with increasing $K_D$ is independent of $K_D$
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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2
The product(s) resulting from the hydrolysis of maltose is/are a mixture of $\alpha$-D-Glucose and $\beta$-D-Glucose a mixture of D-Glucose and L-Glucose $\alpha$-D-Glucose only $\beta$-D-Glucose only
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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3
Amino acid residue which is most likely to be found in the interior of water-soluble globular proteins is Threonine Aspartic acid Valine Histidine
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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4
The reactions leading to the formation of amino acids from the TCA cycle intermediates are carboxylation isomerization transamination decarboxylation
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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5
The total number of fragments generated by the complete and sequential cleavage of the polypeptide given below by Trypsin followed by $CNBr$ is __________. $Phe-Trp-Met-Gly-Ala-Lys-Leu-Pro-Met-Asp-Gly-Arg-Cys-Ala-Gln$
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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6
Match the herbicides in $\text{Group I}$ with the target enzymes in $\text{Group II}$ ... $\text{P-4, Q-1, R-2, S-3}$ $\text{P-4, Q-3, R-2, S-1}$ $\text{P-3, Q-2, R-4, S-1}$
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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7
Match the entries in $\text{Group I}$ with the enzymes in $\text{Group II}$ ... $\text{P-4, Q-1, R-3, S-2}$ $\text{P-3, Q-1, R-4, S-2}$ $\text{P-3, Q-4, R-2, S-1}$
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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8
The catalytic efficiency for an enzyme is defined as $K_{cat}$ $\frac{V_{max}}{K_{cat}}$ $\frac{k_{cat}}{K_m}$ $\frac{K_{cat}}{V_{max}}$
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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9
Which one of the following is an $ABC$ transporter? multidrug resistance protein acetylcholine receptor bacteriorhodopsin $ATP$ synthase
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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10
Which one of the following aminoacids in proteins does $NOT$ undergo phosphorylation? Ser Thr Pro Tyr
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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11
Which one of the following modifications is common toboth protein and DNA? SUMOylation Nitrosylation Methylation Ubiquitination
asked Mar 26, 2018 in Biochemistry Milicevic3306 7.9k points
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12
In a chemostat, the feed flow rate and culture volume are $100$ ml/h and $1.0$ L, respectively. With glucose as substrate, the values of $\mu_{\text{max}}$ and $K_s$ are $0.2 \: h^{-1}$ and $1 \: g/L$, respectively. For a glucose concentration of $10 \: g/L$ in the feed, the effluent substrate concentration (in $g/L$) is _______
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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13
Yeast converts glucose to ethanol and carbon dioxide by glycolysis as per the following reaction: $C_6H_{12}O_6 \to 2C_2H_5OH + 2CO_2$Assuming complete conversion, the amount of ethanol produced (in $g$) from $200 \: g$ of glucose is (up to two decimal places) ____________
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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14
Consider a simple uni-substrate enzyme that follows Michaelis-Menten kinetics. When the enzyme catalyzed reaction was carried out in the presence of $10$ nM concentration of an inhibitor, there was no change in the maximal velocity. However. the slope of the Lineweaver-Burk plot increased $3$-fold. The dissociation constant for the enzyme-inhibitor complex (in nM) is ____________
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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15
A rod shaped bacterium has a length of $2 \: \mu m$, diameter of $1 \mu m$ and density the same as that of water. If proteins constitute $15 \%$ of the cell mass and the average protein has a mass of $50$ kDa, the number of proteins in the cell is __________ ($1$ Da $= 1.6 \times 10^{-24}$g)
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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16
Which of the following are true with regard to anaerobic respiration in bacteria? The final electron acceptor is an inorganic substance other than molecular oxygen The number of ATP molecules produced per glucose molecule is more than that produced in aerobic respiration The number of ATP molecules ... phosphorylation is used to generate ATP P and S only Q and S only P and R only P, Q and S only
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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17
Which of the following components constitute a molecular mechanics force field? Bond stretching Bond angle bending Torsional bond rotation Non-bonded interactions P and Q only P, Q and R only P, Q and S only P, Q, R and S
asked Feb 20, 2018 in Biochemistry gatecse 1.4k points
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