# NCERT Solutions Class 12 Biology Chapter 6 Molecular Basis of Inheritance

NCERT Solutions Class 12 Biology Chapter 6 Molecular Basis of Inheritance with answers available in Pdf for free download. The NCERT Solutions for Class 12 Biology with answers have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Standard 12 by CBSE, NCERT and KVS. Solutions to questions given in NCERT book for Class 12 Biology are an important part of exams for Grade 12 Biology and if practiced properly can help you to get higher marks. Refer to more Chapter-wise Solutions for NCERT Class 12 Biology and also download more latest study material for all subjects

## Chapter 6 Molecular Basis of Inheritance Class 12 NCERT Solutions

Class 12 Biology students should refer to the following NCERT questions with answers for Chapter 6 Molecular Basis of Inheritance in standard 12. These NCERT Solutions with answers for Grade 12 Biology will come in exams and help you to score good marks

### Chapter 6 Molecular Basis of Inheritance NCERT Solutions Class 12

NCERT Solutions Class 12 Biology Chapter 6 Molecular Basis of Inheritance. The NCERT solutions for Class 11 Mathematics have been made by Mathematics teacher of one of the best CBSE school in India. These NCERT solutions have been made to give detailed answers and expanations of the concepts as per NCERT which can be easily understood by the students. Refer to other links also to download mathematics NCERT solutions, worksheets, sample papers and Exemplar Solutions.

Class 12 Biology

NCERT Solutions

Chapter 6 Molecular Basis of Inheritance

1.Group the following as nitrogenous bases and nucleosides: Adenine, Cytidine, Thymine,Guanosine, Uracil and Cytosine.

Ans. Nitrogenous Bases – Adenine, Uracil and Cytosine, Thymine; Nucleosides – Cytidine, guanosine.

2.If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.

Ans. In a DNA molecule, the number of cytosine molecule is equal to guanine molecules & the number of adenine molecules are equal to thymine molecules. As a result, if a double stranded DNA has 20% of cytosine, it has 20% of guanine. The remaining 60% includes both adenine & thymine which are in equal amounts. So, the percentage of adenine is 30%.

3. If the sequence of one strand of DNA is written as follows:

5′-ATGCATGCATGCATGCATGCA

TGCATGC-3′

Write down the sequence of complementary strand in 5′ -> 3′ direction.

Ans. 5′-GCATGCATGCATGCATGCAT G C ATG CAT-3′.

4.If the sequence of the coding strand in a transcription unit is written as follows: 5-

ATGCATGCATGCATGCATGCA TGCATGC-3′ Write down the sequence of mRNA.

Ans. mRNA: 5′ -A U G CAU G CAU G C AU G CA UGCAUGCAUGC-3′.

5.Which property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication? Explain.

Ans. Complementary base pairing property of DNA double helix led Watson and Crick to hypothesise semi-conservative mode of DNA replication. Watson & Crick observed that the nitrogenous bases are in complementary pairing in two strands of double helix of DNA molecule. Such an arrangement of DNA molecule led them to hypothesize the semi conservative mode of replication of DNA.

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Click for more Biology Study Material
 NCERT Solutions Class 12 Biology Chapter 1 Reproduction in Organisms
 NCERT Solutions Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants
 NCERT Solutions Class 12 Biology Chapter 3 Human Reproduction
 NCERT Solutions Class 12 Biology Chapter 4 Reproductive Health
 NCERT Solutions Class 12 Biology Chapter 5 Principles of Inheritance and Variation
 NCERT Solutions Class 12 Biology Chapter 6 Molecular Basis of Inheritance
 NCERT Solutions Class 12 Biology Chapter 7 Evolution
 NCERT Solutions Class 12 Biology Chapter 8 Human Health and Disease
 NCERT Solutions Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production
 NCERT Solutions Class 12 Biology Chapter 10 Microbes in Human Welfare
 NCERT Solutions Class 12 Biology Chapter 11 Biotechnology Principles And Processes
 NCERT Solutions Class 12 Biology Chapter 12 Biotechnology and its Applications
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 NCERT Solutions Class 12 Biology Chapter 16 Environmental Issues

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