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Chapters
2: Reproduction in Lower and Higher Animals
3: Inheritance and Variation
▶ 4: Molecular Basis of Inheritance
5: Origin and Evolution of Life
6: Plant Water Relation
7: Plant Growth and Mineral Nutrition
8: Respiration and Circulation
9: Control and Co-ordination
10: Human Health and Diseases
11: Enhancement of Food Production
12: Biotechnology
13: Organisms and Populations
14: Ecosystems and Energy Flow
15: Biodiversity, Conservation and Environmental Issues
![SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 4 - Molecular Basis of Inheritance - Shaalaa.com](/images/biology-english-12-standard-hsc_6:1b94e35560a844c094a1f846c467d1b4.biology "SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 4 - Molecular Basis of Inheritance")
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Solutions for Chapter 4: Molecular Basis of Inheritance
Below listed, you can find solutions for Chapter 4 of Maharashtra State Board SCERT Maharashtra for Biology [English] 12 Standard HSC.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 4 Molecular Basis of Inheritance MCQ
1 Marks
Find the odd one out:
H2A
H3
H2B
H1
1 Marks
What happened when heat-killed S-cells along with living R-cells were injected into mice?
Mice died and showed live S-cells
Mice survived and showed live S-cells
Mice died and showed live R-cells
Mice died and showed dead R-cells
1 Marks
Find out the double ring compound.
Adenine
Uracil
Cytosine
Thymine
1 Marks
If a DNA has 20 Adenine and 30 cytosine bases. What will be the total number of purine bases in the given sample?
20
50
30
100
1 Marks
Semiconservative mechanism of DNA was detected using:
35S
14C
32P
15N
1 Marks
A template strand of DNA has the base sequence CATGATTAC. New strand synthesized on it will be:
GATCAUATG
GTACTAACG
GAACTAATG
GTACTAATG
1 Marks
During DNA replication, the separated strands of DNA are prevented from recoiling by
DNA primase
Sigma factor
Rho-factor
SSBP
1 Marks
In which of the following synthesis of DNA strand is not involved directly?
m RNA
t RNA
Another DNA strand
Protein
1 Marks
Wobble hypothesis is related with
Ambiguity in codon
Purine pyrimidine equality
Genetic code is triplet
Degeneracy of genetic code and economy of tRNA molecules in the cell
1 Marks
During elongation of polypeptide chain, sigma factor is
Functionless
Retained for specific function
Released for re-use
Required during closing of chain
1 Marks
Enzyme required for peptide formation is
Peptidase
Peptidyl transferase
Nitrogenase
Nitrate reductase
1 Marks
Exon segments are reunited after splicing by
RNA primase
RNA protease
RNA polymerase
RNA ligase
1 Marks
In lac operon, lactose acts as:
Inducer
Co-inducer
Repressor
Co-repressor
1 Marks
A unit of lac-operon which in the absence of lactose, suppresses the activity of operator gene is
Structural gene
Regulatory gene
Repressor protein
Promoter gene
1 Marks
A DNA segment has 75 cytosine and 40 thymine nucleotides. What shall be the total number of phosphates in the DNA segment?
115
230
75
220
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 4 Molecular Basis of Inheritance Very Short Answer
1 Marks
What is the principle of DNA profiling?
1 Marks
What is the use of southern blotting in DNA fingerprinting?
1 Marks
Enlist the genes in Lac operon
1 Marks
What is meant by an operon?
1 Marks
AUG codon gives ________ & ________ amino acids in prokaryotes & Eukaryotes respectively.
1 Marks
What is meant by the activation of amino acids?
1 Marks
What is the role of Mg++ in Translation?
1 Marks
What are the different types of mutations?
1 Marks
Enlist the names of enzymes used in semiconservative replication of DNA?
1 Marks
What is central dogma of molecular biology?
1 Marks
What type of isotopes used in semiconservative replication experiment?
1 Marks
What is the function of RNA primer?
1 Marks
What is the function of SSBP?
1 Marks
Define 'RFLP’.
1 Marks
Define Heterochromatin.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 4 Molecular Basis of Inheritance Short Answer 1
2 Marks
Differentiate between Heterochromatin & Euchromatin.
2 Marks
How t-RNA act as an adapter molecule?
Explain in detail with the help of a diagram.
2 Marks
Define mutation. State its two types.
2 Marks
Describe the Hershey-Chase experiment in detail.
2 Marks
Explain the role of Lactose as an inducer in Lac-operon.
2 Marks
Draw neat and labelled diagram of the Nucleosome.
2 Marks
Write a note on the packaging of DNA in prokaryotes.
2 Marks
Write a note on the packaging of DNA in Eukaryotes.
2 Marks
Explain Avery, McCarty, and MacLeod’s experiment in detail.
2 Marks
Draw neat and labelled diagram of Replication Fork.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 4 Molecular Basis of Inheritance Short Answer 2
3 Marks
Explain the Griffith’s experiment in detail with diagram.
3 Marks
Enlist the characteristics of genetic code.
3 Marks
Short Answer Question:
Write a note on Human genome project (HGP).
3 Marks
Explain different steps involved in DNA Fingerprinting.
3 Marks
Draw a neat and labelled diagram of transcription and processing of hn-RNA
3 Marks
Draw a neat and labelled diagram explaining Meselson’s and Stahl’s experiment.
3 Marks
How Meselson and Stahl explained the concept of Semiconservative Replication of DNA experimentally?
3 Marks
What is meant by an operon?
3 Marks
Give diagrammatic representation of Lac-operon in the presence of inducer.
3 Marks
Define ‘genomics’. Give any ‘two’ applications of it.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 4 Molecular Basis of Inheritance Long Answer
4 Marks
Describe the process of semiconservative replication of DNA with the help of a neat and labelled diagram.
4 Marks
Describe the mechanism of translation with the help of neat and labelled diagram.
4 Marks
Draw a neat and labelled diagram of transcription and processing of hn-RNA
4 Marks
With respect to lac- operon explain the following terms:-
- regulator gene
- promoter gene
- structural gene
- inducer
4 Marks
Short Answer Question:
Write a note on applications of DNA fingerprinting.
Solutions for 4: Molecular Basis of Inheritance
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 4 - Molecular Basis of Inheritance
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Concepts covered in Biology [English] 12 Standard HSC chapter 4 Molecular Basis of Inheritance are Deoxyribonucleic Acid (DNA) and Its Structure, The Genetic Material is a DNA, DNA Replication, Protein Synthesis, Regulation of Gene Expression, Operon Concept, Genomics, Human Genome Project, DNA Fingerprinting Technique, Packaging of DNA Helix, Genetic Code.
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