Microbes in Industrial Products Questions in English

(C) Fungi are widely used in the industry for the production of various enzymes.
$1$. $Rennin$ (also known as chymosin) is produced by fungi like $Mucor$ $miehei$.
$2$. $Cellulase$ is produced by fungi like $Trichoderma$ $reesei$.
$3$. $Glucoamylase$ is produced by fungi like $Aspergillus$ $niger$.
$4$. $Cytochrome$ $oxidase$ is a membrane-bound protein complex involved in the electron transport chain of mitochondria and is not produced as an industrial enzyme by fungi.

(A) $Lactobacillus$ and other Lactic Acid Bacteria $(LAB)$ grow in milk and convert it into curd. During this process,they produce acids that coagulate and partially digest the milk proteins. $Lactobacillus$ is primarily responsible for the large-scale production of lactic acid through the fermentation of sugars present in the medium.

(A) The fungus $Aspergillus$ $niger$ is a filamentous fungus used industrially for the production of organic acids.
Specifically,it is widely employed in the commercial production of $Citric$ $acid$ through the fermentation process.
Therefore,the correct option is $A$.

(B) The production of acetic acid is carried out by the bacterium $Acetobacter$ $aceti$.
$Lactobacillus$ is used for the production of lactic acid.
$Aspergillus$ $niger$ is a fungus used for the production of citric acid.
$Clostridium$ $butylicum$ is used for the production of butyric acid.

(C) Riboflavin is also known as Vitamin $B_2$. It is a water-soluble vitamin that plays a crucial role in energy metabolism and the maintenance of healthy skin,eyes,and nervous system. It is often produced industrially using microorganisms like the fungus $Ashbya$ $gossypii$.

(A) Streptokinase is an enzyme produced by the bacterium Streptococcus and modified by genetic engineering.
It is used as a 'clot buster' for removing clots from the blood vessels of patients who have undergone myocardial infarction (heart attack).
Therefore,the correct option is $A$.

(A) Penicillin is the first antibiotic discovered by Alexander Fleming. It is extracted from the fungus $Penicillium$ $notatum$. Therefore, the correct organism used for its production is a fungus.

(A) The production of ethanol from cereals and fruit juices is carried out through the process of fermentation.
$Saccharomyces \ cerevisiae$,commonly known as Brewer's yeast,is the organism used for this purpose.
It ferments the sugars present in cereals and fruit juices into ethanol and $CO_2$.

(B) Ethanol is produced by the fermentation of sugars by yeast $(Saccharomyces \text{ } cerevisiae)$. In many countries, ethanol is blended with petrol or used as a standalone fuel for vehicles to reduce dependence on fossil fuels and lower carbon emissions. Brazil is globally recognized for its extensive use of ethanol derived from sugarcane as a primary fuel for vehicles.

(C) In Brazil, $Ethanol$ is widely used as a biofuel for vehicles. It is produced through the fermentation of sugarcane molasses by the yeast $Saccharomyces$ $cerevisiae$. This microbial product serves as a renewable and cleaner alternative to fossil fuels.

(D) Alexander Fleming discovered penicillin in $1928$ from the mold $Penicillium$ $notatum$. However,he could not isolate and purify it for mass production. Later,Ernst Chain and Howard Florey worked extensively to isolate,purify,and improve the production of penicillin,establishing its full potential as an effective antibiotic during World War $II$. For this discovery and their work,all three were awarded the Nobel Prize in $1945$.

(A) The production of acetic acid is carried out by the bacterium $Acetobacter$ $aceti$.
$Aspergillus$ $niger$ is a fungus used for the production of citric acid.
$Clostridium$ $butylicum$ is used for the production of butyric acid.
$Lactobacillus$ is responsible for the conversion of milk into curd.

(A) Butyric acid is produced by the bacterium $Clostridium \text{ } butyricum$.
$Lactobacillus$ is responsible for the production of lactic acid.
$Acetobacter \text{ } aceti$ is used for the production of acetic acid.
$Aspergillus \text{ } niger$ is a fungus used for the production of citric acid.

(C) In the industrial sector,enzymes such as lipases,proteases,and pectinases are primarily produced using microorganisms. Among these,fungi (specifically species like $Aspergillus$ $niger$ and $Rhizopus$ $oryzae$) are the most widely used organisms for the large-scale production of various industrial enzymes due to their high secretory capacity and ease of cultivation in bioreactors. Therefore,fungi are the primary source for industrial enzyme production.

(D) Industrial production of enzymes involves the use of microorganisms to produce specific enzymes for various applications.
$1$. Glucose oxidase is used in the food industry for removing glucose from egg whites and in biosensors.
$2$. Glucoamylase is used in the starch processing industry to convert starch into glucose.
$3$. Rennin (or chymosin) is widely used in the cheese-making industry to coagulate milk proteins.
Since all three enzymes are produced on an industrial scale using microbial fermentation,the correct answer is $D$.

(C) The production of steroid hormones like hydroxyprogesterone involves the process of microbial transformation. The fungus $Rhizopus \text{ } nigricans$ is specifically used in the industrial production of hydroxyprogesterone from progesterone through the process of $11\alpha$-hydroxylation.

(A) $Streptokinase$ is an enzyme produced by the bacterium $Streptococcus$ and is modified by genetic engineering to be used as a 'clot buster' for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack.

(C) Cyclosporin-$A$ is an immunosuppressive agent used in organ transplant patients.
It is produced by the fungus $Trichoderma$ $polysporum$.
This compound helps in preventing organ rejection by suppressing the immune system.

$(D)$ Statins, produced by the yeast $Monascus$ $purpureus$, are used as blood-cholesterol lowering agents. They act by competitively inhibiting the enzyme responsible for the synthesis of cholesterol in the body.

(A) Statins are blood-cholesterol lowering agents.
They are produced by the yeast $Monascus$ $purpureus$.
These act by competitively inhibiting the enzyme responsible for the synthesis of cholesterol.

(A) $1$. Microbes are used in the industrial production of various bioactive molecules,enzymes,and vitamins.
$2$. The statement $(S)$ is true because microbial fermentation is a key process in the industrial synthesis of vitamins like $B_2$ (Riboflavin) and $B_{12}$.
$3$. The reason $(R)$ is also true because the fungus $Ashbya$ $gossypii$ is commercially used for the production of Riboflavin ($Vitamin$ $B_2$).
$4$. Since the production of Riboflavin by $Ashbya$ $gossypii$ is a specific example of the general process mentioned in the statement,$R$ is the correct explanation of $S$.

(C) Statement $S$ is true because statins are blood-cholesterol lowering agents that act by competitively inhibiting the enzyme responsible for the synthesis of cholesterol.
Statement $R$ is false because statins are produced by the yeast $Monascus$ $purpureus$,not $Trichoderma$ $polysporum$. $Trichoderma$ $polysporum$ is used to produce cyclosporin $A$,which is an immunosuppressive agent.

(B) The correct pair is $L$-Lysine - Levorotatory lysine.
$L$-Lysine refers to the levorotatory isomer of the amino acid lysine,which is the biologically active form.
Clostridium butylicum is used for the production of butyric acid,not lactic acid (which is produced by Lactobacillus).
Rhizopus nigricans is used for the production of fumaric acid,whereas Cyclosporin $A$ is produced by the fungus Trichoderma polysporum.
Ashbya gossypii is primarily used for the industrial production of Vitamin $B_2$ (Riboflavin),not lipase.

(C) The yeast used for the production of ethanol from fruit juices and cereals is $Saccharomyces \ cerevisiae$,which is commonly known as Brewer's yeast. It performs fermentation to convert sugars into ethanol and $CO_2$.

(C) The antibiotic penicillin was discovered by $Alexander \text{ } Fleming$ in $1928$.
He observed that the mold $Penicillium \text{ } notatum$ inhibited the growth of the bacterium $Staphylococcus \text{ } aureus$.
This discovery marked the beginning of the antibiotic era in medicine.

(B) The fungus $Aspergillus$ $niger$ is a filamentous fungus used industrially for the production of organic acids. Specifically,it is widely used in the commercial production of $Citric$ $acid$ through the fermentation process. Other options like $Acetic$ $acid$ are produced by $Acetobacter$ $aceti$,$Butyric$ $acid$ by $Clostridium$ $butylicum$,and $Lactic$ $acid$ by $Lactobacillus$.

(A) The bacterium $Acetobacter$ $aceti$ is an acetic acid bacterium.
It is used in the industrial production of acetic acid from ethanol through the process of fermentation.
Therefore,the correct option is $A$.

(C) The bacterium $Clostridium$ $butyricum$ is a microbial agent used in industrial production.
It is specifically responsible for the fermentation process that yields $Butyric$ $acid$.
Therefore,the correct option is $C$.

(B) Lipases are enzymes that catalyze the hydrolysis of fats (lipids).
In laundry detergents,lipases are used to effectively remove oily and greasy stains from clothes.
These enzymes break down the lipid molecules into fatty acids and glycerol,which are then easily washed away by water and surfactants.

(B) Riboflavin,also known as Vitamin $B_2$,is commercially produced on a large scale using the fungus $Ashbya$ $gossypii$. This microorganism is highly efficient in the biosynthesis of riboflavin,making it the primary industrial source for this vitamin.

(C) Cyclosporin-$A$ is a bioactive molecule produced by the fungus $Trichoderma$ $polysporum$. It is widely used as an immunosuppressive agent in patients undergoing organ transplantation. It functions by inhibiting the activation of $T$-cells, thereby preventing the immune system from rejecting the transplanted organ.

(D) Statins are bioactive molecules produced by the yeast $Monascus$ $purpureus$.
These act as blood-cholesterol lowering agents.
They function by competitively inhibiting the enzyme responsible for the synthesis of cholesterol in the body.

(A) Penicillin is the first antibiotic discovered by Alexander Fleming. It is extracted from the mold $Penicillium$ $notatum$,which belongs to the kingdom Fungi. Therefore,the correct answer is Fungi.

(D) Alexander Fleming discovered penicillin by chance from the mold $Penicillium \text{ } notatum$. However, its full potential as an effective antibiotic was established much later by Ernest Chain and Howard Florey. They worked on purifying and mass-producing penicillin, which led to its widespread use during World War $II$. For this significant contribution, all three scientists were awarded the Nobel Prize in $1945$.

(C) The correct matching is as follows:
$1$. $Clostridium$ $butylicum$ is used for the production of $Butyric$ $acid$ $(p-iv)$.
$2$. $Rhizopus$ $nigricans$ is used for the production of $Steroids$ $(q-iii)$.
$3$. $Ashbya$ $gossypii$ is used for the production of $Vitamins$ (specifically Riboflavin) $(r-i)$.
$4$. $Monascus$ $purpureus$ is used for the production of $Statins$ (often referred to as Sterins in some contexts, though specifically blood-cholesterol lowering agents) $(s-ii)$.
Thus, the correct sequence is $p-iv, q-iii, r-i, s-ii$.

(B) The correct option is $B$.
$1$. Cyclosporin $A$ is an immunosuppressive agent used in organ transplant patients.
$2$. It is produced by the fungus $Trichoderma$ $polysporum$.
$3$. Therefore,$A$ represents 'Organ transplant' and $B$ represents '$Trichoderma$'.

(A) The bacterium $Pseudomonas$ is used in the production of the drug $Quantum-4000$. This is a specific application of microbial biotechnology in the pharmaceutical industry.

(C) $Saccharomyces$ $cerevisiae$ is a species of yeast.
It is commonly referred to as Baker's yeast because it is used in the baking industry to leaven bread by producing $CO_2$ through fermentation.
It is also known as Brewer's yeast because it is used in the brewing industry for the production of ethanol (alcohol) from sugars present in cereals and fruit juices.
Therefore,it is both Baker's yeast and Brewer's yeast.

(B) Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.
Microorganisms such as bacteria,yeast,and fungi are primarily responsible for carrying out fermentation.
These microbes break down complex organic compounds into simpler substances,which is essential in various industrial processes like the production of beverages,bread,and dairy products.
Therefore,microorganisms play the most significant role in fermentation.

(A) Silage is a type of fodder made from green foliage crops which have been preserved by acidification,achieved through fermentation.
In this process,the carbohydrates present in the green plant tissues are converted into organic acids (primarily lactic acid) by anaerobic bacteria.
This acidification process prevents the growth of spoilage-causing microorganisms,thereby preserving the nutritional value of the fodder for cattle.

(D) Microorganisms are extensively used in industrial processes to produce a wide variety of products that are beneficial to human welfare.
$1$. Beverages: Yeast ($Saccharomyces$ $cerevisiae$) is used for the production of ethanol (alcohol) through fermentation.
$2$. Antibiotics: Microbes like $Penicillium$ are used to produce antibiotics to treat diseases.
$3$. Organic acids: $Aspergillus$ $niger$ produces citric acid,and $Acetobacter$ $aceti$ produces acetic acid.
$4$. Enzymes: Lipases,proteases,and pectinases are produced industrially using microbes.
$5$. Bioactive molecules: Cyclosporin $A$ and statins are produced by microbes.
$6$. Vitamins and Amino acids: Many vitamins and amino acids are synthesized on an industrial scale using specific microbial strains.
Therefore,all the listed categories are correct.

(D) $Saccharomyces$ $cerevisiae$,commonly known as brewer's yeast,is used for fermenting malted cereals and fruit juices to produce ethanol.
Depending on the raw material used for fermentation and the type of processing (distillation or non-distillation),different types of alcoholic beverages are produced.
Wine and beer are produced without distillation,while whisky,brandy,and rum are produced by distillation of the fermented broth.
Therefore,$Saccharomyces$ $cerevisiae$ is used in the production of all these alcoholic beverages.

(C) The yeast $Saccharomyces$ $cerevisiae$,also known as brewer's yeast,is used for fermenting malted cereals and fruit juices to produce ethanol (alcoholic beverages).
$Aspergillus$ $niger$ is a fungus used for the production of citric acid.
$Penicillium$ $notatum$ is a fungus used for the production of penicillin.
Methanogenic bacteria are used in the production of biogas.

(D) Ethanol is produced through the process of fermentation.
Fermentation is carried out by microorganisms, primarily yeast $(Saccharomyces \text{ } cerevisiae)$, which is commonly known as Brewer's yeast.
To produce ethanol, yeast requires a sugar source as a substrate.
Cereals (rich in starch) and fruit juices (rich in natural sugars) are widely used as substrates for this fermentation process.
Therefore, Brewer's yeast is the organism used, and cereals and fruit juices are the substrates used for ethanol production.
Since the question asks for the components used in the production process, all the listed options are involved.

(B) Ethanol is produced by the fermentation of sugars by yeast $(Saccharomyces \text{ } cerevisiae)$.
Brazil is the world's leading producer and user of ethanol as a biofuel for vehicles.
It has successfully implemented a program to blend ethanol with gasoline to reduce dependence on fossil fuels.

(B) Penicillin was the first antibiotic discovered by Alexander Fleming. He observed that the growth of the bacterium Staphylococcus was inhibited in a culture plate where the mold Penicillium notatum was growing. Thus,penicillin is derived from the fungus Penicillium notatum.

(D) Alexander Fleming discovered penicillin in $1928$ from the mold $Penicillium$ $notatum$. However,he could not isolate it in a pure,concentrated form. Later,Ernst Chain and Howard Florey worked extensively to purify and establish its full potential as an effective antibiotic during World War $II$. For this significant contribution,all three scientists were awarded the Nobel Prize in $1945$.

(A) Antibiotics are chemical substances produced by some microbes and can kill or retard the growth of other disease-causing microbes. The discovery of antibiotics,such as penicillin by Alexander Fleming,has been a major milestone in human welfare,as they have significantly reduced mortality rates from infectious diseases.

(A) Citric acid is commercially produced using the fungus $Aspergillus$ $niger$.
$Aspergillus$ $niger$ is a filamentous fungus that is highly efficient in the fermentation process to produce organic acids,specifically citric acid,on an industrial scale.
Other options:
$Clostridium$ $butylicum$ is used for the production of butyric acid.
$Acetobacter$ $aceti$ is used for the production of acetic acid.
$Propionibacterium$ $shermanii$ is used for the production of propionic acid.

(B) Lactic acid is produced by the fermentation of milk or other substrates by lactic acid bacteria $(LAB)$.
$Lactobacillus$ is the most common genus of bacteria used for the production of lactic acid.
$Acetobacter$ $aceti$ is used for the production of acetic acid.
$Clostridium$ $butylicum$ is used for the production of butyric acid.
$Rhizobium$ is a nitrogen-fixing bacterium found in the root nodules of leguminous plants.