Tag: biotechnology

Questions Related to biotechnology

A substance (low molecular weight protein) produced by host cells in response to viral infection and protect other cells against further viral infection is _____________.

biology cell biology and biotechnology stds and infertility gm crops biotechnology

  1. Phytotoxin

  2. Antibody

  3. Interferon

  4. Hormone

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Correct Option: C

Who discovered interferon?

biology cell biology and biotechnology stds and infertility gm crops biotechnology

  1. Isaacs and Lindenmann

  2. Holmes and Knight

  3. Hershey and Chase

  4. Enders

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Correct Option: A
Explanation:

G.M. Findley and McCallum (1937) reported a phenomenon, called viral interference in which the cell infected with one type of virus becomes reisstant to superinfection by other viruses. Alliac Issacs and Lindeman (1957) gave the term interferons to the chemical substances responsible for the viral inference. 

Which of the following processes involves transferring and combination of desirable characteristic features into plants and multiply them ?

biology cell biology and biotechnology stds and infertility gm crops biotechnology

  1. Parthenocarpy

  2. Genetic engineering

  3. Eutrophication

  4. Broadcasting

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Correct Option: B
Explanation:

Genetic engineering is the branch of science which deals with the modification of genes. The desired genes is isolated from the host and are inserted into the vectors. The vectors carries the foreign gene into the desired organism and multiples. The foreign gene multiplies along with the vector and produce a new character.

So, the correct answer is option B.

Bathe spruce and fir trees on mountains are more acidic than

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. $SO _{2}$

  2. Lime juice

  3. Vinegar

  4. $NO _{2}$

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Correct Option: C

The chief source of alcoholic beverages from cereals is

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. Rice

  2. Maize

  3. Rye

  4. Barley

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Correct Option: D
Explanation:

Barley contains the largest amount of enzymes necessary for converting starches to ferment sugars. Barley is commonly used in breads, soups, stews though it is primarily grown as animal fodder and as a source of malt for alcoholic beverages, especially beer.
Thus, the correct answer is option (D), 'Barley'.

Synthesis of antibiotics belongs to

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. Biotechnology

  2. Microbiology

  3. Parasitology

  4. Sericulture.

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Correct Option: A

Which vitamin is synthesised by the bacteria in human gut?

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. Vitamin A

  2. Vitamin C

  3. Vitamin D

  4. Vitamin K

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Correct Option: D
Explanation:

Escherichia coli are Gram-negative, facultative aerobic bacteria. They are common inhabitant of human gut. These strains of E. coli are harmless. They form the part of the normal microbiota of the intestine. They live in symbiotic association. They benefit hosts by producing vitamin K$ _2$ and preventing colonization of the intestine with pathogenic bacteria.

Thus, the correct answer is 'Vitamin K.'

Human proteins can be produced in milk or semen of farm animals

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. True

  2. False, proteins cannot be produced in semen

  3. False, proteins cannot be produced in milk

  4. False, animals are not used for protein production

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Correct Option: A
Explanation:
Milk proteins contain all 9 essential amino acids required by humans. Milk proteins are synthesized in the mammary gland, but 60% of the amino acids used to build the proteins are obtained from the cow's diet. So we can get protein from the cow's milk too.
So the correct option is 'true'.

Which one of the following combinations of microbes is responsible for the formation and flavour of Yoghurt?

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. Lactobacillus casei and Streptococcus thermopiles

  2. Rhizobium maillot and Azotobacter species

  3. Ebodoiquerillurs rub urn and Scincealla typhosa

  4. Bacillus substiles and Escherichia coli

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Correct Option: A

Making of cheese from pasteurised milk is carried out by the enzyme

biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

  1. Protease

  2. Pectinase

  3. Amylase

  4. Lipase

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Correct Option: A