Cell Membranes questions

Cell Membranes questions - 1. The table below refers to...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1. The table below refers to components of the cell surface membrane (plasma membrane) and to their roles in transporting substances across the membrane. Complete the table by inserting an appropriate word or words in the empty boxes. Component Phospholipid Carbohydrate side chain Protein Fatty acids, glycerol and phosphate Peptide Role in transport Chemical bond between subunits Subunits Receptor (Total 6 marks) 2. Write an essay on the following topic: The structure and functions of cell surface membranes. (15) structure and function of cell surface membranes: Introduction could include: outline of fluid mosaic model - communication with external medium, barrier - controls exchange of material - fluid mosaic model: phospholipids and orientation - proteins, glycocalyx, channels - microvilli - passage through the membrane: diffusion, facilitated diffusion, Na/K - osmosis, active transport, ATPase - lipid soluble molecules, adrenaline polar molecules through pores, channels - Vesicles: cytosis - endocytosis, phagocytosis, pinocytosis - exocytosis, secretory vesicles others: glycosides as receptors, insulin- adhesion between cells - immunological response S = 13, B = 2,C = 2 Mr Beritsis 1 3. The diagram below shows the general structure of a phospholipid. Organic group P P CH H C O C H C O C O O H 2 A B = Phosphate group (a) (i) Name the parts labelled A and B. A ................................................................................................................ B ................................................................................................................ (2) (ii) Name the type of reaction by which the bonds between parts A and B may be broken....
View Full Document

This note was uploaded on 11/07/2011 for the course BIOLOGY 100 taught by Professor Staff during the Winter '08 term at BYU.

Page1 / 6

Cell Membranes questions - 1. The table below refers to...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online