Tag: gm crops

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Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of.

  1. Vitamin-B

  2. Vitamin-C
  3. Omega-$3$

  4. Vitamin-A
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

golden rice is a genetically modified crop plant where the incorporated gene. Golden rice is a variety of rice produced through genetic engineering to biosynthesize beta-carotene, a precursor of vitamin A, in the edible parts of rice.

So, the correct option is 'Vitamin A'.

Multiple choice botany biotechnology and its applications biotechnology in agriculture gm crops transgenic organisms

RNA interference which is employed in making tobacco plant resistant to Meloidegyne incognita is essentially involved in

  1. preventing the process of replication of DNA

  2. preventing the process of translation of mRNA

  3. preventing the process of splicing of hnRNA

  4. preventing the process of transcription
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

RNA interference is a gene-silencing process that blocks the expression of genes in the parasite when it enters the host's body.RNA is a method adopted to prevent infestation of roots of tobacco plants by a nematode Meloidogyne incognita. In RNA, a complementary RNA binds to mRNA to form a ds RNA that cannot translate and hence, its expression is blocked.

So, the correct option is 'Preventing the process of translation of mRNA'.

Multiple choice biology biotechnology and genetic engineering biotechnology in agriculture gm crops transgenic organisms

Golden rice is a transgenic crop of the future with the following improved trail

  1. insect resistance

  2. high lysine (essential amino acid) content

  3. high protein content

  4. high vitamin-A content
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Golden rice is a genetically modified variety of rice engineered to produce beta-carotene, which is a precursor to Vitamin A, to address Vitamin A deficiency.

Multiple choice biology reproductive health stds and infertility gm crops biotechnology

Read the following statements and select the incorrect one.

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

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

  1. Hybrid vigour

  2. Hybrid sterility

  3. Hybrid zygote

  4. Hybrid fertility
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

Multiple choice biology reproductive health stds and infertility gm crops biotechnology
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

  1. Artificial insemination

  2. Embryo transplantation

  3. Super ovulation

  4. Preservation of embryo
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice biology reproductive health stds and infertility gm crops biotechnology

Bull semen for the purpose of artificial insemination is stored in 

  1. Ice

  2. Liquid oxygen

  3. Liquid nitrogen
  4. Liquid CO$ _2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Artificial insemination is a globally accepted method of breeding cattle and is also effective for other species. Semen can be stored deep-frozen in liquid nitrogen, in a chilled liquid form or at room temperature. Its low temperature of $-196^0$C and inert caracteristics prevent the deterioration of biological quality. Hence, option C is correct.