Home
Class 11
BIOLOGY
Assertion (A), RBC is devoid of nucleus,...

Assertion (A), RBC is devoid of nucleus, mitochondria, ribosomes.
Reason (R) : The absence of these organelles helps to accomodate more haemoglobin.

A

(A) and (R) are wrong

B

(A) is right and (R) explains A

C

(A) and (R) are right but (R) does not explain A

D

(A) is right and (R) is wrong

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

Assertion (A) : Antibiotics do not help to cure communicable diseases. Reason (R) : They are caused by microbes.

Assertion (A) : Auxins help in apical dominance. Reason (R) : They induce elongation of stems.

Knowledge Check

  • Assertion (A) : Sterilization helps to overcome microbes. Reason (R ) : Explants are autoclaved.

    A
    a) Both A and R are correct but R is not a correct explanation to A
    B
    b) R explains A
    C
    c) A is correct R is incorrect
    D
    d) Both A and R are incorrect

  • Assertion (A) : Golden rice helps to overcome childhood blindness. Reason (R) : It is rich in beta carotene.

    A
    a) Both A and R are wrong .
    B
    b) A is right R is wrong.
    C
    c) R explains A.
    D
    d) A and R are right , R does not explain A.

  • Assertion(A): Phenol is more reactive towards electrophilic substitution reaction. Reason (R): In the case of phenol. the intermediate carbo cations is more resonance stabilized.

    A
    Both A and R are correct and R is the correet explanation of A.
    B
    Both A and R are wrong
    C
    A is correct but R is wrong
    D
    A is wrong but R is correct

    • Similar Questions

    Explore conceptually related problems

    Assertion (A) : Blue green algae are prokaryotes. Reason (R) : They do not have a true nucleus.

    Assertion (A) : We must offer first aid to a bleeding person. Reason (R) : We must not use gloves while helping them.

    Assertion (A) : It is easier to swim in sea water than in river water. Reason (R): Density of sea water is more than that of river water.

    Assertion (A): Omnivores eat both plants and animals. Reason (R) : These organisms may occupy more than one trophic level in the food chain.

    Assertion (A) : Phenol is more acidic than aliphatic alcohols. Reason (R): The phenoxide ion is more stabilized than phenol by resonance effect and hence resonance favours ionization of phenol to form H^(+) and shows acidity.

    Home
    Profile