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Consider the following statements : As...

Consider the following statements `:`
Assertion (A) `:` Amber codon is a termination codon .
Reason (R ) `:` If in a m-RNA, a termination codon is present, the protein synthesis stops abruptly whether the protein synthesis is complete or not.
Now select you answer from code given below `:`

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
C
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Consider the following nucleic acids 1. DNA, 2. r-RNA, 3. t-RNA, 4. m-RNA choose the correct sequence of their arrangement according to their participation in protein synthesis

Assertion (A) : Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) : m-RNA is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.

After the addition of the last amino acid to a growing polypeptide chain during the process of protein synthesis, one of the termination codons reaches the appropriate site on the ribosomal surface and then the following envents take place (i) Release of t-RNA molecule from the ribosome. (ii) Dislodging of polypeptide chain from the t-RNA (iii) Dissociation of ribosomes into large and small subunits. The correct sequence of these events:

During protein synthesis in an organism at one point the process comes to a halt. Select the group o the three codons from the following, from which any one of the three could bring about this halt.

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Copy choice theory for crossing over was proposed by Belling. ...

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  2. [A]: Kornberg and Ochoa got Nobel Prize in the field of genetics. [...

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  3. Consider the following statements : Assertion (A) : Amber codon is a...

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  4. [A): DNA replicates after mitosis. [R]: In mitosis, the chromosomal...

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  5. [A]: DNA code is copied in the synthesis of tRNA. [R]: tRNA moves o...

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  6. [A]: DNA is associated with proteins. [R]: DNA wound around histone ...

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  7. [A]: Translocation involves transfer of genetic material between homol...

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  8. Assertion : Left-handed DNA is known as B-DNA. Reason : Right - han...

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  9. [A]: Meselson and Stahl tested the Watson and Crick Theory of DNA repl...

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  10. Assertion (A) : Adenine cannot pair with cytosine. Reason ® : Becaus...

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  11. Assertion : DNA is associated with proteins. Reason : DNA binds aro...

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  12. Assertion. The genetic code is degenerate. Reason. Most amino acids ...

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  13. Assertion: A non-overlapping code means that a base in mRNA is not us...

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  14. [A]: Recombinant DNA contains DNA from two or more sources. [R]: Pl...

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  15. [A]: Genetic engineering is the use of tech- nology to alter the genom...

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  16. [A]: The Lac operon is an example of inducible system. [R]: When Lac...

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  17. [A]: Vectors carry only the foreign DNA/gene into the host cell. [R]...

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  18. [A]: The series of enzyme controlled reactions determine traits in an ...

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  19. [A]: Raphanobrassica is an excellent example of allotertraploidy. [...

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  20. [A]: Plasmids are double .stranded extra chromosomal DNA. [R]: Plas...

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