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Assertion : Zona pellucida is glycoprote...

Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation .
Reason : The blastocyst , along with zona pellucida enters in decidua of uterus to protect itself from uterine acidic medium .

A

A

B

B

C

C

D

D

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The correct Answer is:
C
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During the neutralisation of an acid by a base, the end point refers to the completion of reaction. The detection of end point in acid-base neutralisation is usually made by an acid-base indicator. An acid-base indicator is itself a weak acid (Phenolphthalein) or a weak base (Methyl orange). At 50% ionisation which depends on the medium. the anion furnished by an indicator (acid) cation furnished colour to solution at end point. For example, phenolphthalein dissociation underset("Colourless")(HIn)toH^(+)+underset("Pink")(In^(-)),K_(HIn)=([H^(+)][In^(-)])/([HIn]) is favoured in presence of alkali and pink colour of phenolphthalein ion is noticed as soon as the medium changes to alkali nature. The end point of acid-base neutralisation not necessarily coincides with eqivalence point but it is closer to equivalence point. Also at equivalence point of acid-base neutralisation, pH is not necessarily equal to 7. The indicator phenolphthalein is a tautomeric mixture of two forms as given below: Which of the following statements are correct? The form II is referred as quinonoid form and is deeper is colour. (Q)The form I is referred as quinonoid form and is light in colour. (R) The form II is more stable in alkaline medium. (S) The change is pH from acidic to alkaline solution bring in the more and more conversion of I form to II form. (T) The form I is more stable in acidic medium.

MOTION-HUMAN REPRODUCTION -EXERCISE - 4 AIIMS - ASSERTION & REASON QUESTIONS (AIIMS - 2015)
  1. Assertion : In the human the temperature of scrotum is 2-2.5^(@)C less...

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  2. Assertion : Vasectomy is considered in permanent sterilisation method ...

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  3. Assertion : Zona pellucida is glycoproteinous in nature and dissolved ...

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  4. Assertion: The menstrual flow results due to breakdown of endometrial ...

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  5. Assertion : During follicular phase , the primary follicles in the ova...

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  6. Assertion : The level of FSH & LH attain a peak level in the middle of...

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  7. Assertion : Regular cyclic menstruation is an indicator of normal repr...

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  8. Assertion : The acrosomal secretions of sperm , help it in entering in...

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  9. Assertion : The nucleus of sperm fuses with the nucleus of ovum , befo...

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  10. Assertion : Females not participate in the determination of the sex of...

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  11. Assertion : hCG , hPL and relaxin are produced in women only during pr...

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  12. Assertion : If fertilization dies not occur than the corpus luteum beg...

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  13. Assertion : The mammary glands of the female starts producing milk jus...

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  14. Assertion : All Eutherian are placental mammals . Reason : All place...

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  15. Assertion : Primary spermatocytes of testes are haploid . Reason : P...

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  16. Assertion : Estrogen level is high during the follicular phase of mens...

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  17. Assertion : Normally monospermy occurs in most of animals . Reason :...

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  18. Assertion : Nucleocytoplasmic ratio decreases in cleavage . Reason :...

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  19. Assertion : Egg of eutherian is multicellular . Reason : Many follic...

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  20. Assertion : Presence of zona pallucida over the fertilized ovum preven...

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