Questions without answers in Plant, Animal and Microbial Biotechnology

Which one of the following options represents the products of light reactions of photosynthesis in plants?$\mathrm{O}_{2} / \mathrm{NADH} / \mathrm{H}_{2}$$\mathrm{O}_{2}...

​​​​Which of the following features is/are used to distinguish Archaea from Bacteria?Gram-stainingPeptidoglycan in the cell wallPresence of N -acetylglucosamine$16 S$ rRN...

​​​​Correctly match the herbicide with its mode of development of resistance in plants.\begin{array}{|l|l|}\hline \textbf{Herbicide } & \textbf{Mode of development of res...

Which of the following plant-based secondary metabolites belong(s) to the class of alkaloids? Ajmalicine $\left(\mathrm{C}_{21} \mathrm{H}_{24} \mathrm{~N}_2 \mathrm{O}_3...

Which of the following is/are considered as biotic elicitor(s) in plant cell culture?CellulaseChitinChitosanMercuric chloride

Which of the following is/are synthetic auxin(s) that does/do NOT occur naturally?$2,4$-Dichlorophenoxyacetic acid Indole-$3$-acetic acidIndole-$3$-butyric acid$1$-Naphth...

Which of the following factors can affect the growth of a microbial culture in a batch cultivation process?$\mathrm{pH}$ of the medium Osmolarity of the mediumSubstrate c...

Which one of the following statements is TRUE about leghemoglobin?It binds oxygen to protect nitrogenaseIt binds hemoglobin to protect oxygenaseIt binds oxygen to protect...

Which of the following is(are) plant protoplast fusogenic agent(s)?Sodium nitratePolyvinyl alcoholPolyethylene glycolBromoxynil

The specific growth rate of a mold during exponential phase of its growth in a batch cultivation is 0.15 h−1 . If the cell concentration at 30 h is 33 g L−1 ,the cell con...

Match the microbial product (Column I) with its respective application (Column II).$$\begin{array} {lll} \textbf{Column I} & & \textbf{Column II} \\ \text{P. Methane} & &...

Which of the following combinations of plant hormones and their associated function are $\text{CORRECT}$?$$\begin{array}{|l|l|l|} \hline & \textbf{Hormone} & \textbf{Func...

Which of the following statement(s) is/are $\text{CORRECT}$ about $\textit{Agrobacterium tumefaciens}$?It contains tumor inducing plasmidIt causes crown gall disease in d...

Which of the following factors can influence the lag phase of a microbial culture in a batch fermentor?Inoculum sizeInoculum ageMedium composition$P$ and $Q$ only$Q$ and ...

Determine the correctness or otherwise of the following Assertion $[a]$ and the Reason $[r]$Assertion $[a]$ : It is possible to regenerate a whole plant from a single pla...

Some of the cytokinins used in plant tissue culture media are given below:$BAP$ZeatinKinetin$2iP$Which of these are synthetic analogs?$P$ and $Q$ only$Q$ and $S$ only$R$ ...

A microorganism isolated from a salt-rich (salt concentration $\sim2$ $M$) lake was found to possess diglycerol tetraethers, with polyisoprenoid alcohol side chains, as t...

Which one of the following is NOT used for the measurement of cell Viability in animal cell culture?Trypan blue dye exclusionTetrazolium (MTT) assayLDH activity in the cu...

A biological process is involved in the __________ treatment of industrial effluent.primarysecondarytertiaryquaternary

Match the secondary metabolites (Column-I) with the corresponding plant species (Column-II).$\begin{array}{|l|l|l|l|} \hline & \textbf{Column-I} & &\textbf{Column-II} \\ ...

In animal cell culture, a CO$_2$ enriched atmosphere in the incubator chamber is used to maintain the culture pH between $6.9$ and $7.4$. Which one of the following state...

Choose the CORRECT combination of True (T) and False (F) statements about microcarriers used in animal cell culture.Higher cell densities can be achieved using microcarri...

The plant hormone indole-$3$-acetic acid is derived fromhistidinetyrosinetryptophanproline

Match the organisms in $\text{Column I}$ with the characteristics in $\text{Column II}$:$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} && \textbf{Column II} \\ \hli...

Which one of the following organisms is responsible for crown gall disease in plants?$\textit{Xanthomonas campestris}$$\textit{Rhizobium etli}$$\textit{Agrobacterium tume...

Match the plant hormones in $\textbf{Column I}$ with functions in $\textbf{Column II}$$\begin{array}{|l|l|l|l|} \hline & \textbf{Column I} && \text{Column II} \\ \hline ...

Growth of a microbe in a test tube is modeled as $\dfrac{dX}{dt} = rX \bigg (1 – \dfrac{X}{K}\bigg )$, where, $X$ is the biomass, $r$ is the growth rate, and $K$ is the c...

Which one of the following relations holds true for the specific growth rate $(\mu)$ of a microorganism in the death phase?$\mu=0$$\mu<0$$\mu=\mu_{\text{max}}$$0<\mu<\mu_...

Match the microorganism in $\text{Group I}$ with their fermentation products in $\text{Group II}$.$\begin{array}{|l|l|l|l|} \hline & \textbf{Group I} && \textbf{Group II}...

Choose the CORRECT sequence of steps involved in cytoplast production.Digestion of cell wall $\to$ protoplast viability $\to$ cybrid formation $\to$ osmotic stabilizerOsm...

Match the following photoreceptors with their prosthetic groups and spectral specificity:$\begin{array}{|l|l|l|} \hline \textbf{Photoreceptor} & \textbf{Moiety that absor...

Match the following plant sources with their secondary metabolites and medical uses:$\begin{array}{|l|l|l|} \hline \textbf{Source plant} & \textbf{Secondary metabolites} ...

The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. ...

If a plant is shifted to cold temperature, which of the following changes would take place in its membrane?Ratio of unsaturated to saturated fatty acids would increaseRat...

Determine the correctness or otherwise of the following $Assertion$ (a) and $Reason$ (r).$Assertion:$ In direct somatic embryogenesis, embryos are developed without going...

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

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...

Match the products in $\text{Group I}$ with the applications in $\text{Group II}$.$\begin{array}{|C|l|C|l|} \hline &\textbf{Group I} & {} &\textbf{Group II} \\\hline P. ...

During photorespiration under low $CO_2$ and high $O_2$ levels, $O_2$ reacts with ribulose1,5- bisphosphate to yieldone molecule each of 3-phosphoglycerate and 2-phosphog...

In leguminous plants, both the rhizobium genes and the plant genes influence nodulation and nitrogen fixation. Which one of the following functions is NOT encoded by the ...