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Assertion: Before fusion, spermatozoa ha...

Assertion`:` Before fusion, spermatozoa have to penetrate egg membrane.
Reason`:` The activated spermatozoa undergo acrosomal reactions and release sperm lysin.

A

a.If both Assertion and Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

b.If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

c.If Assertion is true but Reason is false, then mark (3)

D

d.If both Assertion and Reason are falsse, then marks (4)

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Assertion (A) Enzymes have active sites that hold substrte molecule for a chemical reaction. Reason (R) Drugs compete with natural substrate by attaching convalency to the active site of enzyme. (a)Assertion and reason both are correct statements but reason does not explain assertion. (b)Assertion and reason both are correct and reason explains the assertion. (c)Both assertion and reason are wrong statements. (d)Assertion is correct statement reason is wrong statement.

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Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .

Assertion : Aromatic aldehydes and formaldehyde undergo Cannizzaro reaction. Reason : Those aldehydes which have alpha -H atom undergo Cannizzaro reaction.

Assertion (A) : If the activation energy of a reaction is zero, temperature will have no effect on the rate constant. Reason (R ): Lower the activation energy, faster is the reaction.

Assertion : For a chemical reaction with rise in temperature by 10^(@) the rate constant is nearly doubled. Reason : At t + 10, the fraction of molecules having energy equal to or greater than activation energy gets doubled.

Assertion : Aromatic aldehydes and ketones undergo electrophilic substitution reaction at metaposition. Reason : Carbonyl group activates the ring towards electrophilic substitution reactions.

Each question contains STATEMENTS-1 (Assertion) and STATEMENT -2 (Reason). Examine the statements carefully and mark the correct answer according to the instructions given below: STATEMENT -1: If the activation energy of reaction is zero, temperature will have no effect on the rate constant. STATEMENT-2: Lower the activation energy faster is the raction.

Assertion (A): A certain recation is catalysed by acids and the catalytic activity of 0.1M solutions of the acids in water decrease in the order, HCI, HCOOH , and CH_(3)COOH . The same reaction takes place in anhydrous NH_(3) , but the three acids have same catalytic effect in 0.1M solution. Reason (R) : The order of catalytic activity in water is the same as the order of acidity. in anhyrous NH_(3) , all the three acids are strong.

CENGAGE BIOLOGY ENGLISH-HUMAN REPRODUCTION -Assertion -Reasoning Question
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  2. Assertion: The process of reproduction does not suffer if one ovary is...

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  3. Nothing lives for ever, yet life continues. What does it mean?

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  4. Assertion: Placenta is connected to the fetus by an umbilical cord. ...

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  5. Assertion: Placenta is contra-deciduate and even the fetal placenta is...

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  6. Assertion: Polar bodies have small amount of cytoplasm. Reason: It i...

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  7. Assertion: Ovulation takes place when the blood level of luteinizing h...

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  8. Assertion: Umbilical cord contain 100% fetal blood. Reason: It has s...

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  9. Assertion: The activation of sperm is called capacitation Reason: C...

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  10. Assertion: Before fusion, spermatozoa have to penetrate egg membrane....

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  11. Assertion : In post natal life , oocyte development occurs in mature f...

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  12. Assertion : Placenta is combined structure of foetal tissue & maternal...

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  13. Assertion: Seminal vesicle is known as the accessory sex organ of male...

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  14. Assertion: Testes are retroperitoneal organ in man. Reason: Peritone...

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  15. Assertion: Cervix contains the largest and the most powerful sphincter...

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  16. Assertion: In ovarian cycle, corpus luteum is exocrine gland. Reason...

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