PYQSide ExamsMy practice

Molecular Basis of Inheritance · Question 160

AIPMT 2001MCQEasy📈 Topic in 75% papers+4−1
1

Types of RNA polymerase required in nucleus for RNA synthesis : -

  1. 2
  2. 3
  3. 1
  4. 4

Answer

(2) 3

Solution

As per NCERT, in eukaryotes there are at least three RNA polymerases in the nucleus (in addition to the RNA polymerase found in organelles):

RNA polymerase I ⇒ rRNAs (28S, 18S and 5.8S)

RNA polymerase II ⇒ precursor of mRNA (hnRNA)

RNA polymerase III ⇒ tRNA, 5S rRNA and snRNAs

∴ 3 types of RNA polymerase are required in the nucleus.

Answer: (2)

AIPMT 2001

Keep practising — Molecular Basis of Inheritance

2

A mutant strain of T4 bacteriophage, R-II, fails to lyse E. coli, but when two strains R-IIX and R-IIY are mixed, they lyse E. coli. What may be the possible reason?

  1. Both strains have different cistrons
  2. Both strains have similar cistrons
  3. It is not mutated
  4. Bacteriophage transforms into wild type
AIPMT 2001
3

Method of DNA replication in which two strands of DNA separate and synthesize new strands

  1. Conservative
  2. Non conservative
  3. Dispersive
  4. Semiconservative
AIPMT 2000
4

Which of the following is initiation codon?

  1. AUC
  2. CCU
  3. UAG
  4. AUG
AIPMT 2000
5

Anticodon occurs in:

  1. DNA
  2. r-RNA
  3. t-RNA
  4. m-RNA
AIPMT 2000
6

Length of one loop of B-DNA:

  1. 20 nm.
  2. 10 nm.
  3. 3.4 nm.
  4. 0.34 nm.
AIPMT 2000
7

In three dimensional view the molecule of t-RNA is:

  1. E-shaped
  2. L-shaped
  3. S-shaped
  4. Y-shaped
AIPMT 2000
8

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
AIPMT 2000
9

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

All Molecular Basis of Inheritance PYQs →

PDFDownload Molecular Basis of Inheritance PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)