Recent questions tagged biochemistry

Determine the correctness or otherwise of the following $Assertion$ (a) and $Reason$ (r).$Assertion:$ Plants convert fatty' acids into glucose. $Reason:$ Plants have ...

Match the entries in $\textbf{Group I}$ with those in $\textbf{Group II}$.$\begin{array}{|c|l|c|l|}\hline &\textbf{Group I} & {} & \textbf{Group II} \\\hline P. & \text{M...

Determine the correctness or otherwise of the following $Assertion$ (a) and $Reason$ (r).$Assertion:$ The production of secondary metabolites in plant cell cultures is en...

The molarity of water in a water : ethanol mixture ($15 : 85$, v/v) is approximately$0.85$$5.55$$8.5$$55.5$

In zinc finger proteins, the amino acid residues that coordinate zinc areCys and HisAsp and GluArg and LysAsp and Arg

The helix content of a protein can be determined usingan infrared spectrometera fluorescence spectrometera circular dichroism spectrometera UV-Visible spectrophotometer

The activity of an enzyme is expressed in International Units (IU). However, the S.I unit for enzyme activity is Katal. One Katal is$1.66 \times {10^4}$ IU$60$ IU$6 \time...

Identify the statement that is NOT applicable to an enzyme catalyzed reaction.Enzyme catalysis involves propinquity effectsThe binding of substrate to the active site cau...

A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine withglycinealanineaspartatethreonine

Dimethyl sulfoxide (DMSO) is used as a cryopreservant for mammalian cell cultures becauseit is an organic solventit easily penetrates cellsit protects cells by preventing...

In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand byacetylationphosphorylationmethylationglycosylation

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 ...

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...

First order deactivation rate constants for soluble and immobilized amyloglucosidase enzyme are $0.03 \text{ min}^{-1}$ and $0.005 \text{ min}^{-1}$, respectively. The ra...

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 ...

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 ...

Which of the following are true about bacterial superoxide dismutase?Present in obligate aerobesPresent in facultative anaerobesPresent in aerotolerant anaerobesAbsent in...

Which one of the following amino acids is catalyzed by activated macrophages to produce reactive nitrogen species?ArginineAsparagineCysteineHistidine

Which of the following are true with regard to anaerobic respiration in bacteria?The final electron acceptor is an inorganic substance other than molecular oxygenThe numb...

Which of the following cytokines are endogenous pylogens?Tumor necrosis factor-$\alpha$Interleukin-$1$Transforming growth factor-$\beta$Interleukin-$10$P and Q onlyP and ...

Which of the following components constitute a molecular mechanics force field?Bond stretchingBond angle bendingTorsional bond rotationNon-bonded interactionsP and Q only...