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