Tag: stds and infertility

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Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

Which one of the following groups includes all sexually transmitted disease?

  1. AIDS, Syphilis, Cholera

  2. HIV, Malaria, Trichomoniasis

  3. Gonorrhoea, Hepatitis- B, Chlamydiasis

  4. Hepatitis-B, Haemophilia, AIDS
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

All of the diseases like AIDS, Gonorrhoea, hepatitis- B, chlamydiosis, and syphilis are sexually transmitted diseases. While cholera, malaria, hemophilia are water-borne, parasitic and Mendelian disorders respectively.

So the correct option is 'Gonorrhoea, hepatitis- B, chlamydiasis'.

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology

A farmer introduced garden lizards into his agricultural fields to eradicate insects. This method is

  1. Environmental ethic method

  2. Biological control method

  3. Bio accumulation method

  4. Bio magnification method
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are different forms of pest control methods for the elimination of the insects and pests. If a farmer introduces the organisms or pests which can act on the other harmful pests, known as the biological control method. This method involves the use of living organisms for the eradication of the insects in the farm which destroy the crops. The lizards feed on the insects and protect the crops. 

Thus, the correct answer is option B. 

Multiple choice sexually transmitted diseases stds and infertility reproductive health reproduction biology
Assertion : Chlamydiosis is most common bacterial sexually transmitted disease. 
Reason : It can be easily differentiated from gonococcal urethritis. 

  1. Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.

  2. Both the Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

  3. The Assertion is true but the Reason is false.

  4. Both the Assertion and Reason are false.

  5. The Assertion is false but Reason is true.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlamydiosis or Chlamydia infection is the most commonly sexually transmitted disease and affects the human genital organs. This is caused by the bacterium Chlamydia trachomatis. Gonorrhea or gonococcal urethritis, is a sexually transmitted infection found in men and is caused by the bacterium Neisseria gonorrhoeae and this infection do not show much difference from that caused by Chlamydia trachomatis in men. 

Hence, the correct answer is option C.

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.