Tag: gm crops

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Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Bathe spruce and fir trees on mountains are more acidic than

  1. $SO _{2}$

  2. Lime juice

  3. Vinegar
  4. $NO _{2}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The question is garbled and likely refers to acid rain affecting trees. Vinegar is a common acidic substance, but the comparison in the prompt is nonsensical. Given the options, vinegar is the most acidic substance listed.

Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

The chief source of alcoholic beverages from cereals is

  1. Rice

  2. Maize

  3. Rye

  4. Barley
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Which vitamin is synthesised by the bacteria in human gut?

  1. Vitamin A

  2. Vitamin C

  3. Vitamin D

  4. Vitamin K
Reveal answer Fill a bubble to check yourself
D Correct answer
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.'

Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Which is generally regarded is the first product of ancient biotechnology?

  1. Rubber

  2. Opium

  3. Alcohol

  4. Wax
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Our early ancestors used microorganisms to make cheese, yoghurt and bread. They also made alcoholic drinks like beer and wine. All of these foods and drinks are made by fermentation. Fermentation is the process that many microorganisms (yeasts, moulds and bacteria) use to convert sugars into energy. The products generated from fermentation affect the nature of the food that the microorganism is in - carbon dioxide causes bread to rise, lactic acid makes yoghurt sour, and alcohol is produced in the formation of beer and wine. Fermentation was probably discovered by accident, and our early ancestors didn’t know how it worked. Some societies thought fermentation was a miracle or gift from their god.
So the correct option is 'alcohol'.
Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Yeast yields

  1. Vitamin ${ B } _{ 12 }$

  2. Tocopherol

  3. Riboflavin

  4. Ascorbic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Riboflavin (vitamin B$ _{2}$) is part of the vitamin B group. It is the central component of the cofactors FAD and FMN and as such required for a variety of flavoprotein enzyme reactions including activation of other vitamins. Various biotechnological processes have been developed for industrial scale riboflavin biosynthesis using different microorganisms, including filamentous fungi such as Ashbya gossypii, Candida famata and Candida flaveri, as well as the bacteria Corynebacterium ammoniagenes and Bacillus subtilis. Strains of yeast of the species Candida famata also used to synthesis ribiflavin. Thus, option C is correct. Microorganism Acetobacter is used to yield ascorbic acid. Thus, option D is wrong. Yeast does not yields tocopherol and vitamin B$ _{12}$. Thus, option A and B are wrong.

Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Which of the following is used to promote the growth of new blood vessels, thus help in wound healing?

  1. Humulin

  2. TPA
  3. TGF-$\beta$
  4. $\alpha$-1 antitrypsin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transforming Growth Factor beta (TGF-beta) is a protein that plays a critical role in tissue repair, cell growth, and the formation of new blood vessels (angiogenesis) during wound healing.