About This Chapter
NJBCT: Molecular Biology - Chapter Summary
A vast amount of activity occurs within organisms at the cellular level. This chapter of lessons devoted to molecular biology looks at processes such as mitosis and meiosis in an entertaining way that gives you a chance to refresh your memory and prepare for the NJBCT exam. Along with the previously mentioned topics, this chapter will cover the following areas:
- The cell cycle and the importance of cell differentiation
- Asexual and sexual reproduction
- Models of DNA replication and signaling molecules
- Protein synthesis
- Functions of genes
- Regulation of gene expression
- The genetic code
- A history of biotechnology
- Applications of cell differentiation
This chapter, along with the rest of the lessons in the NJBCT course, is designed to be viewed not only on a computer but across all mobile devices, making it convenient and easy for you to study while on-the-go. Furthermore, a set of self-assessment quizzes is attached so that you can track your progress as you work through the lessons.
1. The Cell Cycle: Definition, Phases & Sequence
Learn about the dividing and non-dividing states of the cell and discover the different phases of the cell cycle, including interphase, cytokinesis, and the stages of cell division.
2. What Is Cell Differentiation? - Process, Importance & Examples
In this lesson, you will learn how your cells become specialized. This specialization of cells allows them to perform different functions and create different parts of your body.
3. Asexual vs. Sexual Reproduction: Comparison & Characteristics
Did you know that some organisms can reproduce without a mate? Check out this video lesson on asexual versus sexual reproduction to discover the different ways organisms can reproduce and the main differences between mitosis and meiosis.
4. What is Mitosis? - Definition, Stages & Function
Every day your body cells are dividing using a process called mitosis. This allows you to grow and replace damaged or worn out cells. Learn about the stages of mitosis: prophase, metaphase, anaphase and telophase.
5. What is Meiosis? - Steps & Results
It's meiosis that gives us the male and female reproductive cells known as the egg and sperm. In meiosis, two cell divisions take place, which produces four genetically unique cells with half the number of chromosomes as the parent cell.
6. What Is DNA Replication? - Conservative, Semi-Conservative & Dispersive Models
How do we know that DNA replication is semi-conservative? How do we know it's not conservative or dispersive? Let's follow the famous experiment by Meselson and Stahl to find out!
7. How Signaling Molecules Control Differentiation
From signaling molecules to transcription factors and gene expression, in this lesson you'll learn what it takes for a cell to differentiate. You'll also learn some of the ways a cell can make sense of different combinations of signaling molecules and how these combinations can be used to guide a cell through the process of differentiation.
8. Protein Synthesis in Cells: Process & Importance
The DNA of the cell contains the blueprints for all the proteins in the body. These blueprints become proteins with the help of RNA and ribosomes. Follow along with this lesson to learn about the two major phases of protein synthesis: transcription and translation.
9. What Are Genes? - Definition, Types & Function
It's in the genes. Height, sense of humor, or athletic skill are all traits we've heard as being in the genes. But what are genes really, and how do they influence who we are, what we look like, and how we function?
10. Regulation of Gene Expression: Transcriptional Repression and Induction
Do our genes work the same way all the time? How do we regulate the expression of our genes? Explore the various ways organisms control gene transcription through repression and induction of operons.
11. What Is the Genetic Code That Translates RNA Into Amino Acids?
How is RNA translated into a series of amino acids? Learn the language of the genetic code, explore a codon dictionary, and discover some basics of genetics in this lesson on translation.
12. What is Biotechnology? - Definition, History & Examples
Biotechnology is a broad category and includes some surprising concepts. Learn what practices and disciplines fall under this exciting and expanding classification.
13. Applications of Cell Differentiation: Benefits & Risks
What is the big deal about stem cells? Well, for one thing, they are able to differentiate into any kind of cell in the body. This lesson will explore the various applications of stem cell technology in medicine.
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Other chapters within the NJBCT: Study Guide & Practice course
- NJBCT: Organic Biochemistry
- NJBCT: Understanding Enzymes
- NJBCT: Cell Biology
- NJBCT: Multicellular Organisms
- NJBCT: Matter & Energy Transformations
- NJBCT: Understanding Ecosystems
- NJBCT: Genetics & Heredity
- NJBCT: Evolution & Diversity
- NJBCT: Scientific Method & Inquiry
- NJBCT: Using Math for Research
- NJBCT: Safety & Standards in the Lab
- NJBCT: Cooperative Scientific Learning
- NJBCT Flashcards