CBSE - Class 12 Biology Molecular Basis of Inheritance Worksheet
1.
Explain (in one or two lines) the function of the followings: (a) Promoter
2.
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.
3.
If the sequence of the coding strand in a transcription unit is written as follows: 5' -ATGCATGCATGCATGCATGCATGCATGC-3' Write down the sequence of mRNA.
4.
Group the following as nitrogenous bases and nucleosides: Adenine, Cytidine, Thymine, Guanosine, Uracil and Cytosine.
5.
Explain (in one or two lines) the function of the followings: (c) Exons
6.
Briefly describe the following: (d) Bioinformatics
7.
If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.
8.
Explain (in one or two lines) the function of the followings: (b) tRNA
9.
Why is the Human Genome project called a mega project?
10.
Differentiate between the followings: (c) Template strand and Coding strand
11.
Differentiate between the followings: (b) mRNA and tRNA
12.
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?
13.
Briefly describe the following: (a) Transcription
14.
List two essential roles of ribosome during translation.
15.
What is DNA fingerprinting? Mention its application.
16.
Briefly describe the following: (c) Translation
17.
Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.
18.
Briefly describe the following: (b) Polymorphism
19.
How did Hershey and Chase differentiate between DNA and protein in their experiment while proving that DNA is the genetic material?
20.
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.
