What is the repeating sequence of collagen and how is it essential to the structure of the triple coils of collagen fibers?

What is the name of the process by which worn-out organelles are digested by lysosomes?

What is the Matrix, collagen fibers, reticular fibers, elastic fibers,

How does NaCl and adding water change the size of ameoba and size of contractile vacules under microscope?

(a) What is the amount of cellulose in plant cell? Describe the molec- ular structure of cellulose. (b) Describe the conversion of cellulose to carbon materials.

Why Cristae are folded?

FIBROCARTILAGE CONNECTIVE TISSUE   What is the main cell type in this tissue?                             [ Select ]                          [A."fibroblast", B."osteocyte", C."adipocyte", D."chondrocyte"]            How are the cells arranged?                             [ Select ]                          [A."randomly, looks like bubbles", B."in perpendicular arrangement to neighboring collagen fibers", C."sits within clearly visible thick bundles of collagen fibers within the extracellular matrix"]            What is the name of the structure that houses the main cell type?                             [ Select ]                          ["A.cytohome", B."cell house", C."osteon", D."lacuane"]            True or false: this cartilage type has a perichondrium.                ["false", "true"]            What is the location of this cartilage?                             [ Select ]                          [A."epiglottis, par of external ear, auditory tubes", B."most…

A triple helix filament structure is highly characteristic of:       a. Microtubules     b. Actin microfilaments     c. Collagen   d. Keratins

Tumors associated with breast cancer usually arise from either epithelial cells or fibroblasts. Because optimal treatment differs depending on the cellular origin of the tumor, it’s important for doctors to determine which cell type is present in a tumor. Unfortunately, the distinctive morphology of epithelial cells is lost when they become cancerous, so this determination cannot be made based on cell shape alone. How might determination of the class(es) of intermediate filaments present in tumor cells aid a doctor in figuring out which cell type is involved in the tumor?

What is the function of cholesterol in the lipid bilateral cell membrane?