Which of the following is a palindromic sequence?

• 5' - CGTATG - 3'

  3' - GCATAC - 5'

• 5' - CGAATG - 3'

  3' - CGAATG - 5'

• 5' - GAATTC - 3'

  3' - CTTAAG - 5'

• 5' - GACTAC - 3'

  3' - TACGAC - 5'

Assertion: One codon may code for more than one amino acid.

Reason: A codon is degenerate and ambiguous.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division

•            A              B             C

  Chromonema Chromatin Metaphase

•         A              B             C

  Chromatin Chromatid Metaphase

•            A              B             C

  Chromonema Chromosome Anaphase

•            A              B             C

  Chromonema Chromatid Anaphase.

RNA interference is essential for the

• cell proliferation

• cell defence

• cell differentiation

• micropropagation

Chromatin is made up of

• DNA and protein

• DNA and histone

• DNA, RNA, protein

• RNA, histone and oil bodies

Which of the following is correct regarding genetic code?

• UUU is the initiation codon which also codes for phenylalanine.

• There are 64 triplet codons and only 20 amino acids

• Three random nitrogen bases specify the placement of one amino acid

• UAA is the nonsense codon which also codes for methionine

Assertion : DNA fingerprinting involves identifying differences in specific regions in DNA sequence.

Reason : DNA fingerprinting is the basis of paternity testing.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

158.

What is incorrect about the following figure representing DNA replication?

• The direction of DNA replication in strand (i)

• The direction of DNA replication in strand (ii)

• Discontinuous replication of strand (i)

• Discontinuous replication of strand (ii)

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

• mRNA with DHU loop and amino acid with CCA end.

• mRNA with CCA end and amino acid with anticodon loop

• mRNA with anticodon loop and amino acid with DHU loop

• mRNA with anticodon loop and amino acid with CCA end

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

• UUU, UCC, UAU

• UUC, UUA, UAC

• UAG, UGA, UAA 

• UUG, UCA, UCG