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IMPORTANT
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While analysing the DNA of an organism, a total number of 5386 nucleotides were found out of which the proportion of different bases were:
Adenine =29%, Guanine =17%, Cytosine =32%, Thymine =17%. Considering the Chargaff's rule, it can be concluded that:

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Important Questions on Molecular Basis of Inheritance

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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 21
In some viruses, DNA is synthesised by using RNA as a template. Such a DNA is called
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 22
If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of N15/N15: N15/N14: N14/N14 containing DNA in the fourth generation would be
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12th CBSE
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NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 23
If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is 5' - ATGAATG - 3', the sequence of bases in its RNA transcript would be
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 24
The RNA polymerase holoenzyme transcribes
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 25
If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of tRNA pairing with it must be
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 26
The amino acid attaches to the tRNA at its
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 27
To initiate translation, the mRNA first binds to
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12th CBSE
IMPORTANT
NCERT Exemplar Biology - Class 12>Chapter 6 - Molecular Basis of Inheritance>MULTIPLE-CHOICE QUESTIONS>Q 28
In E.coli, the lac operon gets switched on when