SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 4 - Molecular Basis of Inheritance [Latest edition]

Find the odd one out:

What happened when heat-killed S-cells along with living R-cells were injected into mice?

Find out the double ring compound.

If a DNA has 20 Adenine and 30 cytosine bases. What will be the total number of purine bases in the given sample?

Semiconservative mechanism of DNA was detected using:

A template strand of DNA has the base sequence CATGATTAC. New strand synthesized on it will be:

During DNA replication, the separated strands of DNA are prevented from recoiling by

In which of the following synthesis of DNA strand is not involved directly?

Wobble hypothesis is related with

During elongation of polypeptide chain, sigma factor is

Enzyme required for peptide formation is

Exon segments are reunited after splicing by

In lac operon, lactose acts as:

A unit of lac-operon which in the absence of lactose, suppresses the activity of operator gene is

A DNA segment has 75 cytosine and 40 thymine nucleotides. What shall be the total number of phosphates in the DNA segment?

What is the principle of DNA profiling?

What is the use of southern blotting in DNA fingerprinting?

Enlist the genes in Lac operon

What is meant by an operon?

AUG codon gives ________ & ________ amino acids in prokaryotes & Eukaryotes respectively.

What is meant by the activation of amino acids?

What is the role of Mg⁺⁺ in Translation?

What are the different types of mutations?

Enlist the names of enzymes used in semiconservative replication of DNA?

What is central dogma of molecular biology?

What type of isotopes used in semiconservative replication experiment?

What is the function of RNA primer?

What is the function of SSBP?

Define 'RFLP’.

Define Heterochromatin.

Differentiate between Heterochromatin & Euchromatin.

How t-RNA act as an adapter molecule?
Explain in detail with the help of a diagram.

Define mutation. State its two types.

Describe the Hershey-Chase experiment in detail.

Explain the role of Lactose as an inducer in Lac-operon.

Draw a neat and labelled diagram of the Nucleosome.

Write a note on the packaging of DNA in prokaryotes.

Write a note on the packaging of DNA in Eukaryotes.

Explain Avery, McCarty, and MacLeod’s experiment in detail.

Draw neat and labelled diagram of Replication Fork.

Explain the Griffith’s experiment in detail with diagram.

Enlist the characteristics of genetic code.

Short Answer Question:

Write a note on Human genome project (HGP).

Explain different steps involved in DNA Fingerprinting.

Draw a neat and labelled diagram of transcription and processing of hn-RNA

Draw a neat and labelled diagram explaining Meselson’s and Stahl’s experiment.

How Meselson and Stahl explained the concept of Semiconservative Replication of DNA experimentally?

Explain the concept of an operon.

Give diagrammatic representation of Lac-operon in the presence of inducer.

Define ‘genomics’. Give any ‘two’ applications of it.

Describe the process of semiconservative replication of DNA with the help of a neat and labelled diagram.

Describe the mechanism of translation with the help of neat and labelled diagram.

Draw a neat and labelled diagram of transcription and processing of hn-RNA

With respect to lac- operon explain the following terms:-

1. regulator gene
2. promoter gene
3. structural gene
4. inducer

Write a note on applications of DNA fingerprinting.