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A : Sigma factor of RNA polymerase reco...

A : Sigma factor of RNA polymerase recognizes the start single region in prokaryotes.
R: Promotor region lies at 5' of template strand.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark

B

If both Assertion & Reason are true and the reason is not the correct explanation of the assertion , then mark

C

If Assertion is ture statement but Reason is false, then mark.

D

If both Assertion and Reason are false statements, then mark.

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The correct Answer is:
B
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Mark the incorrect differences between eukaryotic and prokaryotic transcription. I. In eukaryotes , the genes are split having exons and introns while in prokaryotes it isn't . ii The structural gene which is to be transcribed is generally mono- cistronic in prokaryotes and poly-cistronic in eukaryotes . III . The RAN formed with the help of RNA polymerase in eukaryotes requires future processing to function as m-RNA while in prokaryotes it is directly used as m - RNA. IV. In eukaryotes, RNA polymerase binds to the promoter region while in prokaryotes it binds to the operator region .

Go through the following statements (i) 2'-OH group present at every nucleotide in RNA makes RNA labile and easily degradable. (ii) The transcription and translation can be coupled in bacteria (iii) the promoter is located towards the 5'-end while terminator is located towards the 3'end of the template strand. (iv). In lac operon, the z gene codes for betagalactosidase, y gene codes for permease while i gene codes for the inducer. Which of these are correct statement:

Assertion :- The activity of RNA polymerase at a pormotor is regulated by interaction with accessory protein, which affect its ability to recognise start sites. Reason : The accessibility of promotor ragion of prokaryotic DNA is in many cases is regulated by interactin of proteins with operators.

Read the following statements carefully and choose the correct statements. A. In a transcription unit, the promoter located at the 5' end of coding strand B. The single strand DNA having the polarity 5' rarr 3' is the template strand C. RNA polymerase binds to the operator during transcription. D. Single base DNA differences occur in humans are called Single Nucleotide Polymorphism (SNPs).

When the polymerase reaches the terminator region, the nascent RNA and enzyme are released by which polyeptide molcule?

Refer to the given figure and consider the following statements regarding it . I. A is present at the 5' end of the template strand . II. B is antisense strand having 3'rarr5 ' polarity III. C may have AT rich region or palindromic sequence IV. D acts as a non-template strand Select the option with the incorrect pair of Statements .

(a) Write the RNA strand transcribed from the above transcription unit along with its polarity. (b) Construct a complete transcription unit with promotor and terminator on the basis of the hypothetical template strand given below :

Arrange the following steps in correct order: (TRANSCRIPTION): (I) The nascent RNA separates and RNA polymerase also detaches and thus terminates the process of transcription. (II)RNA polymerase loses the factor, but continues to add ribonucleotides to form RNA. (III) Binding of RNA polymerase to the promoter and its association with initiation factor (sigma) . (IV) The RNA polymerase associates with termination-factor (rho) transiently to stop the transcription process.

AAKASH INSTITUTE-MOLECULAR BASIS OF INHERITANCE -ASSIGNMENT (SECTION -D) (Assertion -Reason Type Questions)
  1. A : RNA polymerase is of three types in eukaryotes for the synthesi...

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  2. The binding site of tRNA with mRNA & amino acids respectively are

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  3. A: Operator gene is functional when it is not blocked by repressor. ...

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  4. A: Peptidyl transfer site is contributed by larger sub-unit of ribos...

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  5. A: Teminism is unidirectional flow of information. R: It requires ...

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  6. A : In bacterial translation mechanism, two tRNA are required by met...

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  7. A: Nutritional mutant strain of pink mould is auxotroph. R: It is...

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  8. A : DNA fingerprinting are important to scientists in human genomic...

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  9. A : c-DNA libraries are important to scientists in human genomics. ...

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  10. A : SNPs- pronounced ''snips '' are common in human genome. R : It...

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  11. A : Catalytic functions were assigned to RNA molecule during evolut...

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  12. A : Kornberg enzyme is asscoitated with the removal of primers an...

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  13. A : Wobbling reduces the number of tRNAs required for polypeptides s...

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  14. A : Unknown DNA after hybridization with VNTR probe, the autoradiogr...

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  15. A: Polypeptide sequence are dictated by DNA and represented by mRNA. ...

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  16. A: Triplet genetic code can be confirmed by frame shift mutations. ...

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  17. A : Lac operon exerts negative control only. R: The operator is occ...

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  18. A : Single DNA depenedent RNA polymerase catalyases transcription of...

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  19. A : Sigma factor of RNA polymerase recognizes the start single regio...

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  20. A: HGP was completed in 2003 by sequencing all genes of all chrom...

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