Biology Lectures with Quizzes Part 1

Testo

Biology is the subject that studies life in all of its forms. The most basic unit and the foundation of all life is the cell.They're incredibly complicated molecular factories and cellular biology studies the structure and functions of the many different things inside a cell. Cells were evolving for over 3 billion years until multicellular animals appeared. That's over two thirds of the age of the Earth!So no wonder they are so complicated. Cells are the smallest things that we think can be counted as life.Unfortunately there isn't a good definition of life that everyone agrees on. For example, viruses, evolve and replicate but they need other life to do so.It looks at DNA, RNA, amino acids and the creation of proteins, how they interact with each other and what affects these interactions. 1:00 This is related to structural biology which looks at the shape of biological molecules 1:05 like amino acids, nucleic acids, and enzymes; why they have those structures and how differences in their structure affects how they work.Biochemistry goes one step even deeper and looks at how these biological molecules interact with each other on a chemical level. 1:20 Life is essentially a load of complex chemical reactions and biochemistry studies the underlying chemical signals and reactions of life. 1:29 The molecules of life are too small to see with optical microscopes and so many techniques in physics like x-ray crystallography, or cryo-electronAs well as tools for studying life, biophysics and quantum biology also look at the physics that underpins biological processes, seeking to explain how things work on a physical level. 1:52 Your DNA holds the blueprint of who you are and genetics is the study of how this information is expressed to create all of the different forms of life through genes, and how this information is passed on from one generation to the next.Biology Quiz Part I. Multiple Choice 1. What is biology? A. The study of rocks B. The study of weather C. The study of life in all its forms D. The study of planets 2. What is the most basic unit of life? A. Atom B. Tissue C. Cell D. Organ3. Cellular biology mainly studies the of cells. A. Weather and climate B. Structure and functions C. History and evolution only D. Sound and light 4. Approximately how long did cells evolve before multicellular animals appeared? A. 1 million years B. 500 million years C. Over 3 billion years D. 10,000 years5. Cells are considered the _ things that scientists generally classify as living. A. Largest B. Fastest C. Smallest D. Heaviest ••. 6. Why are viruses difficult to classify as living organisms? A. They are too large. B. They cannot evolve. C. They need other living cells to reproduce. D. They have no DNA.7. Which of the following molecules carries genetic information? A. Water B. DNA C. Oxygen D. Calcium 8. Which molecule helps build proteins? A. RNA B. Sand C. Iron D. Carbon dioxide9. Structural biology studies the _ of biological molecules. ••• A. Color B. Shape and structure C. Weight only D. Temperature 10. Which of the following is an enzyme? A. A biological catalyst that speeds up reactions B. A type of planet C. A type of mineral D. A gas11. Biochemistry focuses on A. Chemical reactions in living organisms B. Weather forecasting C. Earth's layers D. Astronomy 12. Why can't most biological molecules be seen using ordinary light microscopes? A. They are invisible. B. They are too large. C. They are too small. D. They do not exist.13. Which technique is commonly used to study very small biological molecules? ••• A. Telescope B. X-ray crystallography C. Compass D. Thermometer 14. Biophysics studies. A. Music in nature B. Physics behind biological processes C. Human history D. Ocean currents15. Quantum biology attempts to explain biological processes using principles of A. Economics B. Chemistry only C. Physics at the quantum level D. Geography 16. DNA is often described as the _ of an organism. A. Engine B. Fuel C. Blueprint D. Skeleton18. Genes are responsible for _ A. Producing stars B. Creating and passing on inherited characteristics C. Forming mountains D. Changing the weather19. Which field studies how amino acids, nucleic acids, and enzymes interact chemically? ••• A. Astronomy B. Biochemistry C. Geology D. Ecology20. Which statement best describes life according to the lesson? A. Life is made up of simple reactions only. B. Life is essentially a series of complex chemical reactions. C. Life depends only on sunlight. D. Life exists without cells.Part II. Fill in the Blank 21. The basic unit of life is the Answer: 22. Biology is the study of Answer: _ 23. DNA stores an organism's genetic Answer:. 24. RNA helps in making Answer: 25. Biochemistry studies the chemicalof life. Answer: 26. Structural biology studies the ‚of biological molecules. Answer: 27. Genetics explains how traits are passed from one to another. Answer: ↓28. Viruses need to reproduce. cells Answer: please wait the part 2