Recent questions tagged chemical-and-biochemical-changes

Which of the following statements is/are applicable to Fick's second law:Concentration changes with timeSteady state condition prevailsDiffusion is time dependentConcentr...

Which of the following polymers is/are prone to hydrolytic degradation?Poly(ethylene terephthalate)PolypropylenePoly(lactic acid)Polycaprolactone

Select the correct option to match the Compound/Additive to its most suitable Function from the table given below:Compound/AdditiveFunction$\text{P}$Azocarbonamide$\text{...

Which of the following amines, produced as a result of protein degradation, is/are foul smelling?HistamineCadaverineTyraminePutrescine

Match the vitamins in Column I with their respective coenzyme forms listed in Column II.$$\begin{array}{|ll|ll|} \hline & \textbf{Column I} & & \textbf{Column II} \\ \hli...

Match the class of additives used for food preservation listed in Column I with their specific examples in Column II.$$\begin{array}{|ll|ll|} \hline & \textbf{Column I} &...

Xylooligosaccharides can be produced byhydrolytic degradation of xylan by hydrochloric acidhydrolysis of starchenzymatic hydrolysis of lactoseenzymatic hydrolysis of xyla...

In a $\alpha$-helix, the $\text{R}$-groups on the amino acid residuesare found on the outside of the helixparticipate in the backbone $\text{H}$-bonding that stabilize th...

Which one of the following biomass treatment processes occurs in an oxygen limited condition approximately between $450^{\circ} \mathrm{~C}$ and $600^{\circ}\mathrm{~C}$...

A fuel with composition by mass is given as $78 \%$ carbon $(\mathrm{C}), 16 \%$ hydrogen $\left(\mathrm{H}_{2}\right)$, $3.2 \%$ sulphur $(\mathrm{S}), 1.6 \%$ oxygen $\...

Corrosion of pure iron takes place in an acidic electrolyte by forming $\mathrm{Fe}^{2+}$ ions at ambient condition. The corrosion current density is measured to be $2 \t...

​​​Identify the analysis that must be performed FIRST to judge 'cleanliness' of spice/herb powders.Acid-insoluble ash contentPesticide residue levelsVolatile oil contentM...

​​​​If there is a delay in oil extraction after bran is separated from the brown rice, the quality of rice bran oil deteriorates. Identify the suitable $\textsf{CAUSE}$ a...

Potato slices weighing $50 \: \mathrm{kg}$ is dried from $60 \%$ moisture content (wet basis) to $5 \%$ moisture content (dry basis). The amount of dried potato slices ob...

​​​​Which of the following sequence of events occurs during formation of egg-white gel?Assume: $\mathrm{P}_{\mathrm{N}}$: Native protein; $\mathrm{P}_{\mathrm{D}}$: Denat...

​​​​Which of the following statement(s) is/are $\textsf{TRUE}$ for a package of gamma-irradiated ($7.5 \: \mathrm{kGy}$) whole chicken?Nutritional quality of the product ...

​​Which of the following is/are inhibitor(s) of enzymatic browning in peeled potatoes?Citric acidEDTAMannitolAscorbic acid

Given that k is the first order reaction rate constant and T is the temperature in absolute scale, the temperature dependence of rate constant is/are represented by.

The unique flavor of chocolate and cocoa is due to the formation of$5$-methyl-$2$-phenyl-$2$-hexenalCycloteneFuraneolMaltol

Which one of the following statements regarding moisture sorption isotherms of a dried food is NOT correct?At a given temperature, the difference between adsorption and d...