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Molecular Basis of Inheritance

Model Mcq for AIPMT,Board exams and various other medical entrance examination

25 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

The enzyme used to cut the DNA molecule at specific site is

  1. restriction endonuclease
  2. DNA-ligase
  3. DNA-polymerase
  4. RNA-polymerases
Question 2 Multiple Choice (Single Answer)

In DNA, two nucleotides are linked by

  1. hydrogen bonds
  2. peptide bonds
  3. disulphide bonds
  4. phosphate diester bonds
Question 3 Multiple Choice (Single Answer)

Semi-conservative model of DNA replication was experimentally proved by

  1. Jacob and Monad
  2. Meselson and Stahl
  3. Beadle and Tatum
  4. Watson and Crick
Question 4 Multiple Choice (Single Answer)

The exchange of chromosomes segments between non-homologous chromosomes is called

  1. Translocation
  2. Deletion
  3. Duplication
  4. Frame shift
Question 5 Multiple Choice (Single Answer)

The enzyme that helps in breaking and resealing DNA strand is

  1. Primase
  2. DNA ligase
  3. Helicase
  4. Topoisomerase
Question 6 Multiple Choice (Single Answer)

The four nitrogen base sequence which form the code words for RNA language is

  1. UGTC
  2. AGCU
  3. ATCG
  4. GAUT
Question 7 Multiple Choice (Single Answer)

Which of the following is not a termination codon?

  1. UAA
  2. UAG
  3. UGA
  4. AUG
Question 8 Multiple Choice (Single Answer)

The type of RNA specifically responsible for directing the proper sequence of amino acids in protein sythesis is

  1. ribosomal RNA
  2. messenger RNA
  3. transfer RNA
  4. soluble RNA
Question 9 Multiple Choice (Single Answer)

The base sequence of the template strand of DNA is CATAAGCATGATGAC. What will be the sequence of RNA strand which is complimentary with the DNA?

  1. GTA ATCGATCTAUAC
  2. AUCGUAGUACUG
  3. GTAATGATGGUACUG
  4. GUAUUCGUACUACUG
Question 10 Multiple Choice (Single Answer)

3 to 5 strand of DNA generally acts a template for the synthesis of

  1. only protein
  2. only DNA
  3. only RNA
  4. both RNA & DNA
Question 11 Multiple Choice (Single Answer)

The two strands of DNA are linked by

  1. phosphate-diester bonds
  2. covalent bonds
  3. hydrogen bonds
  4. ionic bonds
Question 12 Multiple Choice (Single Answer)

In split genes, the non coding sequences are called

  1. Cistrons
  2. Operons
  3. Exons
  4. Introns
Question 13 Multiple Choice (Single Answer)

The anticodon present in tRNA, which can carry methionine is

  1. AUG
  2. UAG
  3. UAC
  4. UCA
Question 14 Multiple Choice (Single Answer)

How many base pairs will be there in four codon?

  1. 9 base pairs
  2. 12 base pairs
  3. 15 base pairs
  4. 10 base pairs
Question 15 Multiple Choice (Single Answer)

Total number of base pairs in one full turn of B-DNA is

  1. 12
  2. 11
  3. 10
  4. 9
Question 16 Multiple Choice (Single Answer)

The number of nucleotides in the gene which code for dystophin protein is

  1. 3000 base pairs
  2. 1 million base pairs
  3. 2.4million base pairs
  4. 1.2 million base pairs
Question 17 Multiple Choice (Single Answer)

Which of the following codon code for phenylalanine?

  1. AUG
  2. UUU
  3. GGG
  4. AAA
Question 18 Multiple Choice (Single Answer)

The chromosome which carry the least number of gene is

  1. Chromosome 1
  2. Chromosome 2
  3. X-Chromosome
  4. Y-Chromosome
Question 19 Multiple Choice (Single Answer)

The triple nature of codon was suggested by

  1. Francis Crick
  2. George Gamow
  3. Griffith
  4. T H Morgan
Question 20 Multiple Choice (Single Answer)

Alec Jeffrey is associated with

  1. Polymerase chain reaction
  2. Recombinant DNA technology
  3. Southern blotting
  4. DNA finger printing
Question 21 Multiple Choice (Single Answer)

The direction in which new RNA elongates during transcription is

  1. 3 to 5
  2. 5 to 3
  3. 3 to 3
  4. 5 to 5
Question 22 Multiple Choice (Single Answer)

Genetic code was given by

  1. Jacob and Monad
  2. Watson and Crick
  3. Nirenberg
  4. Beadle and Tatum
Question 23 Multiple Choice (Single Answer)

The scientists involved in discovery of DNA as transforming agent in bacteria were

  1. Hershey and Chase
  2. Griffith and Avery
  3. Avery, MacLeod and McCarty
  4. Watson and Crick
Question 24 Multiple Choice (Single Answer)

Proof reading enzyme during the synthesis of new bacterial DNA from template DNA is

  1. helicase
  2. primase
  3. DNA polymerase
  4. ligase
Question 25 Multiple Choice (Single Answer)

Which enzyme catalyses the synthesis of DNA from RNA?

  1. Restriction enzyme
  2. DNA polymerase
  3. RNA polymerase
  4. Reverse transcriptase
  5. DNA ligase
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