The fluid-mosaic model of a plasma membrane describes the bilayer of phospholipids in cellular membranes. This bilayer consists of two layers of phospholipids with the tails facing inward toward each other and the heads facing to the outside of the membranes.
The following is a comprehensive list of essay questions that have been asked on past AP exams. The questions are organized according to units. Unit 1 (Basic Chemistry and Water) 1. The unique properties (characteristics) of water make life possible on Earth. Select three properties of water and.During an investigation of freshwater lake, an AP Biology student discovers a previously unknown microscopic organism. Further study shows that the unicellular organism is eukaryotic b. Prokaryotic cells lack membrane-bound organelles found in eukaryotes. However, prokaryotes must perform many of the same functions as eukaryotes.Essay Questions On Cell Biology 1. Describe each cell organelle and its function. What is the difference between the nuclear envelop and the cell membrane in terms of structure and function? 2. 3. Which organelle has its own DNA? How does this relate to maternal genetics? Describe the molecular components of ATP. How do ADP and P relate to ATP.
The force required to resist the movement of water by osmosis. Osmotic pressure is a measure of the concentration of a solution. A solution that is highly concentrated has a strong tendency to draw water into itself, so the pressure required to resist that movement would be high.
Some pathogenic bacteria enter cells, replicate, and spread to other cells, causing illness in the host. N-terminal portions of several gasdermin proteins associate in the cell membrane to form large, nonspecific. Free-Response Question 2 AP Biology Sample Student Responses and Scoring Commentary from the 2018 Exam Administration: Free.
Remediation Essays.. describe the transport process and explain how the organization of cell membranes functions in the movement of specific molecules across the membrane; and b) explain the significance of each type of transport to a specific cell (you may use different cell types as examples.). Pose a scientific question that connects.
Biology - Relating Cells to a. The organelles to be examined are: the nucleus, nuclear envelope, chromatin, nucleolus, vacuole, cell membrane, lysosome, mitochondrion, golgi apparatus, ribosome, and endoplasmic reticulum. The membrane of a cell can be associated to the walls and roof of a house.
Practice: Cell membrane questions. This is the currently selected item. Cell membrane introduction. Phospholipid structure. Cell membrane overview and fluid mosaic model. Cell membrane proteins. Cell membrane fluidity. Membrane dynamics. Fluid mosaic model: cell membranes article. Next lesson.
Biological Molecules and Enzymes (Questions) 1. a) The diagram shows the formula of a molecule of an organic compound. (i) To which group of organic compounds does this molecule belong? (1 mark) (ii) Give one way in which this molecule differs from other compounds in the group. (1 mark) b) The table shows some of the organic compounds found in a bacterial cell.
Chapter title: Membrane Structure and Function. The “ability of the cell to discriminate in its chemical exchanges with the environment is fundamental to life, and it is the plasma membrane that makes this selectivity possible.”.
AP BIOLOGY STUDENT ESSAY QUESTION OBJECTIVES This is a list of questions that cover topics that have been on previous AP Biology Free Response Questions from the last several years. BASIC CHEMISTRY 1. How do the unique chemical and physical properties of water make life on earth possible? THE CHEMISTRY OF ORGANIC MOLECULES 2.
The Nucleus, a membrane-bound structure of a cell, plays two crucial roles in controlling the cell. The nucleus carries the cell's genetic information that determines if the organism will develop, for instance, into a tree or a human; and it directs most cell activities including growth, metabolism, and reproduction by controlling protein synthesis.
Biology IB HL 1. Previous IB Exam Essay Questions: Unit 1 Use these model essay question responses to prepare for essay questions on your in class tests, as well as the IB Examination, Paper 2. These questions have appeared on recent IB examinations, exactly as shown below.. have cholesterol in the cell membrane, plant cells do not.
AP Biology - Cell Biology: Help and Review Chapter Exam Instructions. Choose your answers to the questions and click 'Next' to see the next set of questions.
How do the cells in your body define their boundaries (and control what comes in or goes out)? As it turns out, cells have a sophisticated and flexible barrier, the plasma membrane, and a wide array of strategies for transporting molecules in and out. Learn more about what the membrane's made of and how different types of molecules move across it.
AP Biology Cells Test Review DRAFT. 3 years ago. by mrskarle. Played 726 times. 2. 9th - 12th grade. Biology.. 36 Questions Show answers. Question 1. SURVEY. 30 seconds. Q. Which four structures are found in all cells?. Which of the following substances can not cross the cell membrane on its own without the assistance of a transport.
Previous IB Exam Essay Questions: Unit 2 Use these model essay question responses to prepare for essay questions on your in class tests, as well as the IB Examination, Paper 2. These questions have appeared on recent IB examinations, exactly as shown below. Following each question is the markscheme answer which was used to evaluate student.