The cell membrane is constantly changing, with the cytoskeleton having the ability to both add and take away membrane components. True False

Match each organelle with its corresponding structure/function. [Each choice will be used exactly once.] DOD Smooth Endoplasmic Reticulum Golgi Complex Lysosome Ribosome Nucleus 1. Made of rRNA and protein. A single membrane that is continuous with the Rough Endoplasmic Reticulum. Large spherical structure surrounded by 2 membranes that are spanned by pores. Resembles a stack of pita bread; where each pita is a flattened membranous sac. Small spherical sac filled with hydrolytic enzymes. 2. 3. 4. 5.

Proteins that will be exported from the cell are synthesized by which of the following cellular components? Rough ER Free cytoplasmic ribosomes Lysosomes Golgi vesicles  Smooth ER

A matrix composed primarily of the carbohydrate cellulose, this structure provides protection and support for plant cells. Group of answer choices Golgi apparatus Cell wall Endoplasmic reticulum membrane

the structure of the plasma membrane is best described as: two layers of phospholipids stacked on top of each other, with proteins embedded in the phospholipids Oa single layer of proteins and polysachharides mixed together two layers of proteins stacked on top of each other O many sheets of peptidoglycan stacked on top of each other O one layer of triglycerides on top of a layer of proteins

How is transport across the cell membrane controlled? Diffusion Concentration gradient Permeability What can and can not diffuse through plasma membrane? Factors affecting diffusion: concentration gradient, temperature, molecule size, surface area

Which of the following can cross the plasma membrane because of its selective permeability? Group of answer choices ions glucose large, polar molecules hormones and gases

QUESTION 1 a) Figure 2 shows the fluid mosaic model of plasma membrane. Figure 2 i) Name the parts labelled A and B. A: .. ii) State the component and function of structure C. Component Function: b) Movement of solutes across a membrane occur with the help of transport protein. i) Name the disease due to defective carrier proteins that transport cystine. i) Name and describe one (1) type of gated ion channel. i) Explain how glucose molecules are transported across plasma membrane into a cell via passive transport.

Plasma membrane of disc Plasma membrane of outer segment PDE CGMP Na* Cytosol Opsin is labeled O A В

Oxygen gas (O2) is a small nonpolar molecule. What is the transport mechanism for oxygen to cross the plasma membrane?     Group of answer choices   diffusion facilitated diffusion osmosis active transport endocytosis