Microbes in Food and Beverage

Q. Match the following:

Substance	Effect
i) Marijuana	a) Eases pain
ii) Morphine	b) Analgesic, anti-imflammatory, anthelmintic
iii) Datura	c) Psychoactive
iv) LSD	d) Hallucinogenic

1. i ii iii iv
   a b c d
2. i ii iii iv
   c a d b
3. i ii iii iv
   d b a c
4. i ii iii iv
   c a b d

Q. Microinjection and gene gun methods are the part of:

1. Direct gene transfer
2. Indirect gene transfer
3. PCR technique
4. DNA test

Q. Citric acid is produced by

1. Lactobacillus
2. Aspergillus niger
3. Acetobacter aceti
4. Clostridium butylicum

Q. Vinegar is prepared from alcohol with the help of

1. Lactobacillus
2. Acetobacter
3. Rhizobium
4. Azotobacter

Q.

Match the following list of microbes and their importance:
$\begin{array}{cccc}a.& Saccharomycescerevisiae& \left(i\right)& Productionofimmuno\\ & & & suppressiveagent\\ b.& Monascuspurpureus& \left(ii\right)& RipeningofSwisscheese\\ c.& Trichodermapolysporum& \left(iii\right)& Commercialproductionofethanol\\ d.& Propionibacteriumsharmanii& \left(iv\right)& Productionofblood\\ & & & cholesterolloweringagents\end{array}$

1. a-iii; b-i; c-iv; d-ii

2. a-iii; b-iv; c-i; d-ii

3. a-iv; b-iii; c-ii; d-i

4. a-iv; b-ii; c-i; d-iii

Q.

Name some traditional Indian foods made of wheat, rice and Bengal gram (on their products) which involve the use of microbes.

Q. In case of drugs, the formulation with suitable preservatives has to undergo_________ before its availability for commercial use.

1. strict clinical trials
2. accurate separation techniques
3. heat shock treatment
4. prolonged restriction digestion

Q. (a) Describe the series of experiments of F. Griffith. Comment on the significance of the results obtained.

(b) State the contribution of Macleod, McCarty and Avery. [5]

Q. Statement I: Acetic acid production involves both aerobic and anaerobic processes
Statement II: Production of alcohol from glucose is an aerobic process and production of acetic acid from alcohol is an anaerobic process

Choose the correct option:

1. Both statements are true
2. Both statements are false
3. Statement II is true but statement I is false
4. Statement I is true but statement II is false

Q. Which one of the following is the incorrect match?

1. Cocaine- stimulant
2. Cocaine - Depressant
3. Morphine- painkiller
4. LSD- Hallucinogen

Q.

Which organism makes the bread soft and fluffy?

Q. Which of the following statements are correct?

1. Saccharomyces cerevisiae, commonly called brewer’s yeast, is used for production of alcoholic beverages like wine, beer and whisky.
2. Production of beverages on laboratory scale requires growing microbes in very large vessels called fermentors.
3. Saccharomyces cerevisiae ferments malted cereals and fruit juices to produce ethanol.

1. 1 only
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3

Q. Which one of the following drug is obtained from a fungus?

1. Heroin
2. LSD
3. Cocaine
4. Morphine

Q. It has been observed that about 250 g of Methylophilus methylotrophus produces 25 tonnes of protein per day. How much of Methylophilus is required to produce 1 kg of protein in the same period?

1. 2 g
2. 0.002 g
3. $1\times {10}^{-5}$
4. 0.0002 kg

Q. Acetylation of morphine leads to the production of:

1. heroin
2. smack
3. diacetylmorphine
4. All of these

Q.

Match column I with column II and select the correct option.

Column I	Column II
1. Acetobacter aceti	a. Butyric acid
2. Lactobacillus	b. Citric acid
3. Aspergillus niger	c. Acetic acid
4. Clostridium butylicum	d. Lactic acid

1. 1 - a, 2 - b, 3 - c, 4 - d
2. 1 - c, 2 - d, 3 - b, 4 - a
3. 1 - d, 2 - c, 3 - b, 4 - a
4. 1 - b, 2 - d, 3 - c, 4 - a

Q. Soft and fluffy texture of bread is due to the production of .

1. oxygen
2. carbon dioxide
3. heat
4. water

Q. Which of the following is true with respect to the fermentation process

1. batch process

2. continuous process

3. both a and b

4. none

Q. RQ of sprouting potato is

1. 1
2. > 1
3. < 1
4. Zero

Q. Tempeh (Indonesia), Tofu (Japanese), Sufu (Chinese) are fermented food obtained from ________.

1. barley
2. palm
3. soybean
4. potato

Q.

What is the commercial use of the bacteria Streptococcus thermophilus?

Q. In surgery, the drug Morphine is used widely because of its

1. Euphoric properties
2. Hallucinating properties
3. Analgesic Properties
4. Tissue healing properties

Q. Sid saw his grandmother adding little amount of curd to a bowl full of warm milk. When he asked his grandmother why she did this, grandmother replied, she is preparing curd for the next day. Why do you think Sid's grandmother added curd to the milk?

1. The lactic acid present in the curd that was added will turn all the milk in the bowl into curd
2. The curd added as inoculum contains alkaline substances that can cause precipitation of milk proteins to form curd
3. The curd that was added will absorb all the water from the milk causing it to curdle
4. The curd that was added contained microbes that will multiply and ferment the milk to form curd

Q. Assertion :Rhizobium lives in the root nodules of leguminous plants. Reason: It fixes nitrogen through a symbiotic relationship.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Opiate narcotic is:

1. ganja
2. charas
3. hashish
4. heroin

Q. Choose the correct option.

(iii) The process of pasteurisation involves

1. 
   Heating and cooling
2. 
   Heating
3. 
   Cooling
4. 
   Boiling

Q. Assertion :$Bt$ toxin are protein crystals containing insecticidal protein. Reason: Bacillus thuringiensis form these protein crystals throughout continuously during their growth period.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Match the following list of bacteria and their commercially important products.

Bacterium	Product
(i) Aspergillus niger	(A) Lactic acid
(ii) Acetobacter aceti	(B) Butyric acid
(iii) Clostridium butylicum	(C) Acetic acid
(iv) Lactobacillus	(D) Citric acid

Choose the correct match.

1. i-(B), ii-(C), iii-(D), iv-(A)
2. i-(B), ii-(D), iii-(C), iv-(A)
3. i-(D), ii-(C), iii-(B), iv-(A)
4. i-(D), ii-(A), iii-(C), iv-(B)

Q. It has been observed that about 250 g of Methylophilus methylotrophus produces 25 tonnes of protein per day. What is the mass of Methylophilus required to produce 2500 g of protein in the same period?

1. 25 g
2. 0.0025 g
3. $2.5x{10}^{-5}\mathrm{Kg}$
4. 0.00025 Kg

Q. Microorganism used in fermentation for alcohol is

1. Lactobacillus
2. Saccharomyces
3. Penicillium
4. Acetobacter