Tag: transgenic animals

Questions Related to transgenic animals

Given below are certain features of mice. Read them and select why mice is most preferred animal for studies on gene transfer.


(i) Short estrous cycle and gestation period
(ii) Relatively short generation time
(iii) Convenient in vitro fertilisation
(iv) Production of several offspring per pregnancy 

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. (i) and (ii) only

  2. (i) only

  3. (i), (ii) and (iv) only

  4. (i), (ii), (iii) and (iv)

Show answer
Correct Option: D
Explanation:

Mouse is the most preferred animal for studies on gene transfer due to many favourable features like short oestrous cycle and gestation period, relatively short generation time, production of several offspring per pregnancy, convenient in vitro fertilisation, successful culture of embryo in vitro, etc.

Giant mouse has been produced through

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Gene transfer

  2. Gene differentiation

  3. Tissue culture

  4. All of these

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Correct Option: A
Explanation:

Transgenic mouse is larger because expression of the gene for human growth factor has been introduced into it.

Read the following statements : 
I) Mule is developed by interspecific hybridisation
II) Groups of bees is called 'swarms'
III) For the herd-improvement cross-breeding is employed
IV) In MOET, fertilised egg at 6-8 celled stage is recovered non - surgically

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. I, II, III, IV are true

  2. III , IV, V are false

  3. I, II, IV are true

  4. I, II, III and V are true

Show answer
Correct Option: A
Explanation:

  • As a mule is produced by crossing a female horse with a male donkey, it can be said to be an interspecific hybrid.
  • Swarming can be defined as the process by which a queen bee forms a new colony. Consequently, the term ‘swarms’ is used to refer to the colonies of honey bees.
  • Cross-breeding enables the production of hybrids that are superior in one respect or the other to their respective parents.
  • In MOET, the female is made to produce more eggs than normal, usually 6-8. After the fertilization of these eggs with sperms, these fertilized eggs are non-surgically removed and transferred to other females.
Hence, the correct answer is 'I, II, III, IV are true'.

The injecting of foreign gene in an animal gives rise to 

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Transgenic animal

  2. Transgenic organism

  3. Transgenic plant

  4. Transcribed animal

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Correct Option: A
Explanation:

Transgenic animals are animals that have had a foreign gene deliberately inserted into their genome. Such, animals are most commonly created by micro-injection of DNA into the pronuclei of a fertilized egg which is implanted into the oviduct of a pseudopregnant surrogate mother. This results in the recipient giving birth to genetically modified offspring. 

Which of the following is the key principle of bioethics?

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Animal rights

  2. Environmental ethics

  3. Autonomy

  4. All of the above

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Correct Option: D

The gene transfer in eukaryotic cells is also known as 

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Transformation

  2. Transfection

  3. Transduction

  4. Both A and B

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Correct Option: B

Genetic engineering helps to degrade .......... in the food.

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Organic acids

  2. Allergens

  3. Microflora

  4. Minerals

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Correct Option: B
Explanation:

Genetic engineering has great potential for improving the safety of plant-based foods by eliminating allergenic components. 

Identify the correct application of biotechnology in food processing.

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Conversion of perishable raw material into the nonperishable food product

  2. Conversion of nonperishable raw material into food product

  3. Conversion of decayed food into useful food products

  4. None of these

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Correct Option: A
Explanation:

Answer is option A i.e. "Conversion of perishable raw material into the nonperishable food product"
Biotechnology in the food processing sector makes use of micro-organisms for the preservation of food. Food processing is a process by which perishable raw materials are converted to edible and  non-perishable foods and beverages, which have a longer shelf life.

Maximum number of existing transgenic animals is of

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. Pig

  2. Fish

  3. Mice

  4. Cow

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Correct Option: C

Current cloning technology is limited because

zoology biotechnology and its applications transgenic animals transgenic organisms applications of biotechnology

  1. It inhibits the growth of native animals.

  2. It spreads the disease to the other animals.

  3. All cloned may suffer from developmental abnormalities.

  4. None of the above

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Correct Option: C