Ch.7 DNA and Chromosome StructureWorksheetSee all chapters
All Chapters
Ch.1 Introduction to Genetics
Ch.2 Mendel's Laws of Inheritance
Ch.3 Extensions to Mendelian Inheritance
Ch.4 Genetic Mapping and Linkage
Ch.5 Genetics of Bacteria and Viruses
Ch.6 Chromosomal Variation
Ch.7 DNA and Chromosome Structure
Ch.8 DNA Replication
Ch.9 Mitosis and Meiosis
Ch.10 Transcription
Ch.11 Translation
Ch.12 Gene Regulation in Prokaryotes
Ch.13 Gene Regulation in Eukaryotes
Ch.14 Genetic Control of Development
Ch.15 Genomes and Genomics
Ch.16 Transposable Elements
Ch.17 Mutation, Repair, and Recombination
Ch.18 Molecular Genetic Tools
Ch.19 Cancer Genetics
Ch.20 Quantitative Genetics
Ch.21 Population Genetics
Ch.22 Evolutionary Genetics
Sections
DNA as the Genetic Material
DNA Structure
Alternative DNA Forms
RNA
Bacterial and Viral Chromosome Structure
Eukaryotic Chromosome Structure
LearnAdditional Practice

Concept #1: Chromosome Structure

Practice: Which of the following terms is used to describe “open chromatin” which is loosely packaged DNA?

Practice: Histone proteins are responsible for what?

Practice: Which of the following is the correct order of chromosomal packaging levels?

Practice: What is the name of the enzyme that removes supercoils in DNA?

Previous SectionBacterial and Viral Chromosome Structure
Additional Problems
The sum of histone modifications and their interactions is called the ________.A) genetic codeB) transcription codeC) expression codeD) protein codeE) histone code
What is this an image of?a) supercoils b) a nucleosome c) a DNA double helix d) histones e) loops
What is this an image of?a) supercoils b) a nucleosome c) a DNA double helix d) histones e) loops
True or FalseThis cell is 2n = 10. Each chromosome contains 1 long molecule of double stranded DNA and proteins. The chromosomes are replicated. There are five different lengths of chromosomes in the cell. This cell is diploid. The bands on the chromosomes represents certain genes
How do interspersed repeated DNA sequences differ from tandemly repeated DNA sequences? a. Interspersed repeated DNA is derived from transposable elements, but tandemly repeated DNA is not. b. The repeats in tandemly repeated DNA are up to several kilo base pairs long, but the repeats in interspersed repeated DNA are up to 100 base pairs long. c. Tandemly repeated DNA has been shown to disrupt genes and cause disease in humans but interspersed repeated DNA is never associated with human disease. d. Open reading frames are usually found in tandemly repeated DNA, but not in interspersed repeated DNA.
The letter A indicates _____.a) supercoils b) a nucleosome c) a DNA double helix d) histones e) loops
The letter C indicates _____.a) supercoils b) a nucleosome c) a DNA double helix d) histones e) loops
Complete the following sentences about DNA packaging. Some terms may be used more than once. The less condensed form of chromatin is _____.The inactive form of chromatin is _____.A core composed of eight _____ proteins interacts with DNA through hydrogen bonding and ionic bonds. If DNA structure is described as beads-on-a-string, a bead is a _____. The more darkly-staining form of chromatin is _____. If DNA structure is described as beads-on-a-string, the string is the _____. A _____ is a DNA-protein complex. nucleosome        DNA molecule        euchromatin       histone       heterochromatin