Tag: biotechnology

Questions Related to biotechnology

Breeding for disease resistance requires

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. A good source of resistance

  2. Planned hybridisation

  3. Disease test

  4. All the above.

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Correct Option: D

Match the columns:

I II
a Mutation breeding 1 Johannsen
b Inbreeding depression 2 Karpechenko
c Pureline selection 3 Darwin
d Intergeneric hybridization 4 Staddler
5 Shull
biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. a-4, b-2, c-5, d-1

  2. a-4, b-5, c-2, d-1

  3. a-4, b-5, c-1, d-2

  4. a-5, b-4, c-1, d-2.

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Correct Option: C

The Ear cockier of wheat can be differentiated from Molya disease of wheat by the fact that in the former.

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Plants become dwarf, stem and leaves become twisted spike lets get distorted and grains get replaced by brown stony structures

  2. Plants become pale, leaves turn yellow with reddish lip, roots get matted and fail to ear

  3. Root tips swell and cyst adheres to roots that turn brown and fall

  4. Show hypertrophy of stern and leaves and roots swell

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Correct Option: A

State whether the following statement is true or false.
Ability of an organism to resist disease is called as host resistance.

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. True

  2. False

  3. Ambigous

  4. Data insufficient

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Correct Option: A
Explanation:

Ability of an organism to resist disease is called host resistance. These plant varieties are developed under Integrated Pest Management to provide resistance against a particular variety of pest. 

Example Bt Cotton a transgenic plant which has resistance to a certain kind of disease called the boll disease.
So, the given statement is true.

Which one of the following is the indigenous breed of chickens ?

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. plymouth rock

  2. white leghorn

  3. aseel

  4. rhode island red

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Correct Option: C
Explanation:

Aseel is a pure indigenous breed of chicken originated from India and Pakistan. They are used for cock fighting. They are very large breed of chicken from subcontinents. This breed is good in high yield of meat but it is not good for egg production. The average weight of cock varies from 4 to 5 kg and hens 3 to 4 kg. 

Which one of following breeds of cattle is a cross-breed and high milk yielding ?

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Sahiwal

  2. Karan-Swiss

  3. Tharparkar

  4. Jersey.

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Correct Option: B
Explanation:

Karan Swiss is the hybrid variety and high milk yielding breed of cow. It is the hybrid breed of Taurine and Zebu. Taurine is used for milk production, while Zebu is used for flesh.

Which pathogen causes the blast disease of rice?

biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

  1. Cercospora personata

  2. Pyricularia oryzae

  3. Xanthomonas citri

  4. Tungro virus

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Correct Option: B
Explanation:
Blast disease in rice is caused by the fungus Magnaporthe oryzae which was earlier known as Pyricularia oryzae. Different parts of the plants are affected by the fungus. The blast can occur wherever blast spores are present. Rice can have blast in all growth stages. There are lesions formed on the leaf, panicle and neck region of the plant. There is great loss in yield due to this disease affecting the rice plants.
Thus, the correct answer is option B.

Read the following statements and select the incorrect one.

biology reproductive health stds and infertility gm crops biotechnology

  1. Semen is preserved for artificial insemination by heating

  2. Mating of an animal within the same breed, but having no common ancestors on either side of their pedigree upto 4 - 6 generations is called as outcrossing

  3. Example of interspecific hybridisation is mule

  4. Hinny is a hybrid between the female ass and stallion.

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Correct Option: A

When a species of an organism cannot form a zygote but the zygote survives, the phenomenon is known as

biology reproductive health stds and infertility gm crops biotechnology

  1. Hybrid vigour

  2. Hybrid sterility

  3. Hybrid zygote

  4. Hybrid fertility

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Correct Option: B
Explanation:

Hybrid zygotes sometimes develop into adults, such as mules (hybrids between female horses and male donkeys), but the adults fail to develop functional gametes and are sterile. This phenomenon is called as hybrid sterility. Thus, option B is correct. 

Heterosis, also called hybrid vigour, the increase in such characteristics as size, growth rate, fertility, and yield of a hybrid organism over those of its parents. Plant and animal breeders exploit heterosis by mating two different pure-bred lines that have certain desirable traits. Thus, option A is wrong. 
In some cases, no barriers exist to mating between members of different species. In these cases, the zygote formed is called a hybrid zygote. Thus, option C is wrong. 
Fertility ability of a hybrid is called as hybrid fertility. Thus, option D is wrong.

The ova are released by hormone induction and fertilization by artificial insemination and then embryo is stored at 4$^o$C for several years. This technique is known as

biology reproductive health stds and infertility gm crops biotechnology

  1. Artificial insemination

  2. Embryo transplantation

  3. Super ovulation

  4. Preservation of embryo

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Correct Option: D
Explanation:

Embryo cryopreservation or preservation of embryo is generally performed as a component of in vitro fertilization which generally also include ovarian stimulation, ovarian hyperstimulation or superovulation, egg retrieval, artifical insemination and embryo transfer.