The direction of transcription is

  • always from 5’ to 3’

  • always from 3’ to 5’

  • depends on the template direction

  • sometimes 5’ to 3’ and sometimes 3’ to 5’

The strand of DNA which does not code for anything is referred to as

  • anti-sense strand

  • coding strand

  • non-coding strand

  • template strand

which of the following is true for coding strand

(2)it’s polarity is 5’ to 3’

(3)it’s a sense strand

(4)Both b and c

  • it’s known as template strand

  • 2
  • 3
  • 4

Which of the following is true for promoter and terminator of a transcription unit?

  • Both flank the structural gene

  • promoter is upstream of the structural gene w.r.t coding strand polarity

  • terminator is downstream of the structural gene w.r.t coding strand polarity

  • all of the above

Template and coding strands are defined by the presence of

  • terminator

  • structural gene

  • promoter

  • all of these

In transcription unit regulatory sequences are present

  • always at the upstream of the promoter

  • always at the downstream of the promoter

  • may be present further upstream or downstream to the promoter

  • before the structural gene and after the promoter

Which of the following is incorrect for a gene?

(1)functional unit of inheritance

(2)sequence of DNA which codes for a protein only

(3)monocistronic or polycistronic

(4)DNA sequence coding for tRNA or rRNA molecule
  • 1
  • 2
  • 3
  • 4

Which of the following is a false statement?

  • structural gene in transcription unit could be polycistronic in eukaryotes

  • structural gene in transcription unit could be polycistronic in prokaryotes

  • structural gene in transcription unit could be monocistronic in eukaryotes

  • None of these

Which of the following would be present in processed RNA?

  • exons

  • introns

  • both A and B

  • sometimes exons sometimes introns

which of the following is incorrect

  • mRNA(messenger RNA)

  • tRNA(transfer RNA)

  • rRNA(ribosomal RNA)

  • mRNA(matured RNA)

How many RNA-dependent RNA Polymerase are there for the transcription of all types of RNA in bacteria?

  • 0

  • 1

  • 2

  • 3

Which of the following is not true for RNA Polymerase?

  • It binds to promoter for initiation of transcription

  • template dependent mode of action

  • It follows the rule of complementarity

  • It uses nucleotide triphosphate as substrate

Out of the three processes of transcription which one is catalysed by RNA Polymerase?

  • process of elongation

  • process of initiation

  • process of termination

  • all of the above

which of the following is true for bacterial transcription?

  • RNA processing is required in it

  • Transcription takes place in nucleus

  • Transcription and translation takes place in same compartment

  • all of the above

In an eukaryotic cell, types of RNA Polymerase present are not less than

  • (a)3

  • (b)4

  • (c)2

  • ()1

Which of the following RNA Polymerase is used for the transcription of hnRNA ?

  • RNA Polymerase II

  • RNA PolymeraseIII

  • RNA PolymeraseI

  • All of these

In hnRNA, tailing and capping takes place at the

  • 5’ and 3’ end respectively

  • 3’ and 5’ end respectively

  • 3’ and 3’ end respectively

  • 5’ and 5’ end respectively

Tailing of hnRNA takes place in a

  • template dependent manner

  • template independent manner

  • random manner

  • all of the above

In eukaryotes the process of splicing does not involve

  • removal of introns only

  • removal of introns and joining of exons

  • capping at 5’end

  • tailing at 3’end

The process of splicing involves represents the dominance of

  • DNA world

  • RNA world

  • Protein world

  • Nucleic Acid world

In which of the following process nucleic acid is not copied to nucleic acid

  • Transcription

  • Replication

  • Translation

  • All of the above

Which of the following is not true statement?

  • In translation, the transfer of genetic information from a polymer of nucleotides to a polymer of amino acids takes place.

  • complementarity exist between nucleotide sequences and amino acids sequences.

  • The basis for transcription and replication is complementarity.

  • A change in nucleic acid is responsible for change in amino acid

Which of the following enzyme can be used for the polymerisation of RNA in a template independent manner

  • RNA Polymerase

  • RNA primase

  • polynucleotide phosphorylase

  • RNA phosphatase

codons are generated by 4 nitrogenous bases using laws of

  • Probability

  • Number system

  • Permutation and combination

  • Binomial theorem

How many statements are correct?

a. Codons are always triplet.

b. There are total 64 codons code for amino acids.

c. Codon is read in mRNA in non- contagious fashion.

d. Code is nearly universal.

e. Some amino acids are coded by more than one codon

f. Codon is ambiguous

  • 5

  • 2

  • 3

  • 4

Codon is

  • unambiguous and non specific

  • non degenerate

  • unambiguous and degenerate

  • non universal and non degenerate

Which of the following is incorrect option

  • A change of single base pair in the gene results in the change of amino acid in case sickle cell anemia

  • In case sickle cell anemia charged amino acid is changed to non polar amino acid

  • Amino acid residue glutamine is changed to valine

  • Sickle cell anemia is an example of point mutation

The change in the reading frame will depend on

  • no of bases deleted

  • no of bases added

  • no of bases deleted or added

  • always change the reading frame either bases are deleted or added

tRNA acts as

  • adapter RNA

  • structural RNA

  • matured RNA

  • messenger RNA

Which is correct about tRNA

  • It has amino acid acceptor end

  • It has codon loop

  • It has 2 strands

  • There are 64 tRNA for 64 codons

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