NCERT Exemplar (Objective) Based MCQs Molecular Basis of Inheritance Botany NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

In a DNA strand the nucleotides are linked together by:
1. glycosidic bonds
2. phosphodiester bonds
3. peptide bonds
4. hydrogen bonds

Subtopic: The DNA |

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A nucleoside differs from a nucleotide. It lacks the:
1. base
2. sugar
3. phosphate group
4. hydroxyl group

Subtopic: The DNA |

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Both deoxyribose and ribose belong to a class of sugars called:
1. trioses
2. hexoses
3. pentoses
4. polysaccharides

Subtopic: The DNA |

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The fact that a purine base always pairs through hydrogen bonds with a pyrimidine base in the DNA double helix leads to:
1. the antiparallel nature
2. the semiconservative nature
3. uniform width throughout DNA
4. uniform length in all DNA

Subtopic: DNA Double Helix |

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The net electric charge on DNA and histones is:
1. both positive
2. both negative
3. negative and positive, respectively
4. zero

Subtopic: DNA Packaging |

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The promoter site and the terminator site for transcription are located at:
1. 3' (downstream) end and 5' (upstream) end, respectively of the transcription unit
2. 5' (upstream) end and 3' (downstream) end, respectively of the transcription unit
3. the 5' (upstream) end
4. the 3' (downstream) end

Subtopic: Transcription |

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Which of the following is true with respect to AUG?
1. It codes for methionine only
2. It is an initiation codon
3. It codes for methionine in both prokaryotes and eukaryotes
4. All of the above

Subtopic: Genetic Code |

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The first genetic material could be:
1. protein
2. carbohydrates
3. DNA
4. RNA

Subtopic: DNA vs RNA as Genetic Material |

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With regard to mature mRNA in eukaryotes:
1. exons and introns do not appear in the mature RNA
2. exons appear but introns do not appear in the mature RNA
3. introns appear but exons do not appear in the mature RNA
4. both exons and introns appear in the mature RNA

Subtopic: Transcription |

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The human chromosome with the highest and least number of genes in them are respectively:
1. Chromosome 21 and Y
2. Chromosome 1 and X
3. Chromosome 1 and Y
4. Chromosome X and Y

Subtopic: Human Genome Project |

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Select Chapter Topics:

The DNA

DNA Double Helix

DNA vs RNA as Genetic Material

DNA Packaging

Translation

Translation Mechanism

Gene Regulation: Introduction

Gene Regulation: Lac Operon

Gene Regulation in Eukaryotes

Human Genome Project

DNA Fingerprinting

DNA Replication

Genetic Code

Search for Genetic Material

Transcription

Mutations and Genetic Code

Summary

RNA world

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Select Chapter Topics:

The DNA

DNA Double Helix

DNA vs RNA as Genetic Material

DNA Packaging

Translation

Translation Mechanism

Gene Regulation: Introduction

Gene Regulation: Lac Operon

Gene Regulation in Eukaryotes

Human Genome Project

DNA Fingerprinting

DNA Replication

Genetic Code

Search for Genetic Material

Transcription

Mutations and Genetic Code

Summary

RNA world

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