Assertion Reason MCQ Biology

Assertion Reason MCQ Biology
assertion reason Biology test
Assertion-Reason Multiple-Choice Zoology Biology


1. Assertion (A): In citric acid cycle, when succinate is oxidized to fumarate, a molecule of carbon dioxide is lost.
Reason (R): When succinate is oxidized to fumarate, electrons and protons are passed to FAD reducing it toFADH2.
Ans. (d)

2. Assertion (A): Before the origin of life, the atmosphere on earth was deducing in nature.
Reason (R): There was a great deal of volcanic activity at that time.
Ans. (b)

3. Assertion (A): RNA polymerases can synthesize RNA molecules from DNA template in both 5-3 and 3-5 directions.
Reason (R): RNA polymerases can slide in either direction along a DNA template.
Ans. (d)

4. Assertion (A): In sycon (Scypha), only self fertilization occurs.
Reason (R): In sycon, special sex organs are lacking.
Ans. (d)

5. Assertion (A): In prokaryotes, the translation begins on m-RNA before transcription is completed.
Reason (R): The triplet codons in prokaryotic m-RNA are transcribed from the sense strand of DNA and subsequently are translated continuously from the 3’ — OH end to the 5’ — PO4 end
Ans. (c)


6. Assertion (A): In the zygote, there is no cytoplasmic contribution from paternal side.
Reason (R): The cytoplasm of the sperm is discarded just before fertilization.
Ans. (a)

7. Assertion (A): Only the male offspring of the hemophilic father suffers from the disease.
Reason (R): Hemophilia is an X-Linked dominant disease.
Ans. (c)

8. Assertion (A): Nucleolus is the site for rRNA synthesis.
Reason (R): rRNA is needed for its function within the nucleus.
Ans. (b)

9. Assertion (A): Glycine is an optically active amino acid.
Reason (R): The a-carbon in glycine is asymmetric.
Ans. (d)

10. Assertion (A): Increase in the atmospheric temperature results in higher relative humidity.
Reason (R): High ambient temperature increases the capacity of the air to retain moisture.
Ans. (d)