Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

7. DNA and Chromosome Structure

DNA Structure

Genetics

7. DNA and Chromosome Structure

DNA Structure

Previous problemNext problem

Struggling with Genetics?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

DNA fragment A consists of how many base pairs?

A sequence of amino acids linked by peptide bonds

A specific number of paired nucleotides between two strands

A single strand of DNA with unpaired bases

Two nucleotides joined by a phosphodiester bond

Previous problemNext problem

Verified step by step guidance

Understand the definition of a DNA fragment: it is a segment of double-stranded DNA consisting of a specific number of base pairs, where each base pair is formed by two complementary nucleotides bonded together.

Recall that base pairs refer to the paired nucleotides on opposite strands of the DNA double helix, typically adenine (A) pairing with thymine (T), and cytosine (C) pairing with guanine (G).

Recognize that the term 'base pairs' counts the number of these complementary nucleotide pairs, not individual nucleotides or amino acids.

Differentiate between DNA fragments and other molecular structures: amino acids linked by peptide bonds form proteins, single strands of DNA do not have paired bases, and phosphodiester bonds connect nucleotides within a single strand rather than between strands.

Conclude that the number of base pairs in a DNA fragment corresponds to the number of paired nucleotides between the two complementary strands of the DNA segment.