All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology
Endomembrane System
Cell Junctions

Concept #1: Nucleus and Chromatin

Concept #2: Nucleolus and Nuclear Envelope

Practice: Chromatin is organized into ____________________________________.

Practice: What is the nucleolus?

Practice: How do molecules move in and out of the nucleus?

The chromosomal hereditary material is packaged in this organelle in eukaryotic cells but not in prokaryotic cells. This organelle is a.  mitochondria b.  chloroplasts c.  plasma membrane d.  nucleus e.  centrioles
The ways by which a cell avoids surface limitations to diffusion does not include:  a. Having a nucleus b. A flattened shape c. Being long and thin d. Having specialized structures for labor within the cell memebrane e. Having a vacuole filled with water
The most prominent organelle in most eukaryotic cells is the:  a. Endoplasmic reticulum b. Nucleus c. Ribosome d. Nucleolus e. Cell membrane
The function of the nucleolus is:  a. Protein synthesis b. Photosynthesis c. Transport of material into and out of the nucleus d. Assembly of components of ribosomes e. Assembly of mRNA
A discreet package of DNA and associated proteins in eukaryotes is a:  a. Chromosome b. Nucleus c. Ribosome d. Golgi body e. Centriole
Which structure is the repository of the genetic information that directs all of the activities of the cell?a. ERb. mitochondriac. nucleusd. chloroplastse. centriole
Nuclear pores apparently permit the passage of onlya. chromosomes outwardb. glucose molecules outwardc. assembled DNA molecules outwardd. proteins inward and outward, but RNA only outward 
Based on the structure of the DNA backbone you would predict the surface of histones to be:  a. Negatively charged b. Positively charged c. Neutral d. Hydrophobic e. Hydrophilic
A cell would pack its DNA as chromatin in preparation for:  a. Replication b. Transcription c. Translation d. Splicing e. Mitosis
The nucleus has many different roles in eukaryotic cells. Check all that apply.A. Calcium is stored within the nucleus.B. Assembly of ribosomal subunits occurs in the nucleus.C. Synthesis of mRNA from DNA occurs in the nucleus.D. Packaging of proteins for export from the cell occurs in the nucleus.E. Synthesis of ribosomal RNA occurs in the nucleus.F. Synthesis of proteins occurs within the nucleus.