CBSE - Class 12 Biology Molecular Basis of Inheritance Worksheet
1.
Differentiate between the followings: (a) Repetitive DNA and Satellite DNA
2.
Explain (in one or two lines) the function of the followings: (c) Exons
3.
Explain (in one or two lines) the function of the followings: (b) tRNA
4.
If the sequence of one strand of DNA is written as follows: 5' -ATGCATGCATGCATGCATGCATGCATGC-3' Write down the sequence of complementary strand in 5'\(\rightarrow\)3' direction.
5.
Why is the Human Genome project called a mega project?
6.
If the sequence of the coding strand in a transcription unit is written as follows: 5' -ATGCATGCATGCATGCATGCATGCATGC-3' Write down the sequence of mRNA.
7.
Differentiate between the followings: (c) Template strand and Coding strand
8.
Differentiate between the followings: (b) mRNA and tRNA
9.
Briefly describe the following: (d) Bioinformatics
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?
11.
List two essential roles of ribosome during translation.
12.
Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.
13.
How did Hershey and Chase differentiate between DNA and protein in their experiment while proving that DNA is the genetic material?
14.
What is DNA fingerprinting? Mention its application.
15.
Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.
16.
Briefly describe the following: (a) Transcription
17.
Group the following as nitrogenous bases and nucleosides: Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.
18.
Briefly describe the following: (c) Translation
19.
Briefly describe the following: (b) Polymorphism
20.
If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.
