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Molecular Basis of Inheritance · Question 167

AIPMT 2000MCQEasy📈 Topic in 75% papers+4−1
1

Similarity in DNA and RNA:

  1. Both have similar sugar
  2. Both are genetic material
  3. Both have similar pyrimidine
  4. Both are polymer of nucleotides

Answer

(4) Both are polymer of nucleotides

Solution

As per NCERT, DNA and RNA are both polynucleotides, i.e., polymers of nucleotides.

Sugar: deoxyribose in DNA but ribose in RNA ⇒ (1) is wrong.

Pyrimidines: cytosine and thymine in DNA but cytosine and uracil in RNA ⇒ (3) is wrong.

Genetic material: DNA in most organisms, RNA only in some viruses; most RNA (mRNA, tRNA, rRNA) only functions in protein synthesis ⇒ (2) is not a general similarity.

Answer: (4)

AIPMT 2000

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2

Which is the most important factor for continuity of a species from evolutionary point of view?

  1. Formation of gametes
  2. Synthesis of proteins
  3. Replication of genetic material
  4. None of these
AIPMT 2000

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