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Class 12
Botany :-NCERT Solutions - Molecular Basis Of Inheritance.

Question 1
Group the following as nitrogenous bases and nucleosides:
Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.


Answer

Question 3

If the sequence of one strand of DNA is written as follows:
5-ATGCATGCATGCATGCATGCATGCATGC-3
Write down the sequence of complementary strand in 5→3 direction


Answer

Question 4
If the sequence of the coding strand in a transcription unit is written as follows:
5-ATGCATGCATGCATGCATGCATGCATGC-3
Write down the sequence of mRNA.


Answer

Question 5
Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.


Answer

Question 7
How did Hershey and Chase differentiate between DNA and protein in their experiment while proving that DNA is the genetic material?


Answer

Question 8 

Differentiate between the followings: (a) Repetitive DNA and Satellite DNA (b) mRNA and tRNA (c) Template strand and Coding strand

Answer

Question 10
In the medium where E. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down some time after addition of lactose in the medium?

Answer

Question 11
Explain (in one or two lines) the function of the followings:
(a) Promoter
(b) tRNA
(c) Exons


Answer

Question 12
Why is the Human Genome project called a mega project?


Answer

Question 13
What is DNA fingerprinting? Mention its application.


Answer

Question 14
Briefly describe the following:
(a) Transcription
(b) Polymorphism
(c) Translation
(d) Bioinformatics


Answer

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