QUESTION 5 Lipid-soluble solutes move across membranes along their concentration gradients by: O passive diffusion through the lipid bilayer and active transport O passive diffusion through the lipid bilayer and facilitated diffusion O passive diffusion through the lipid bilayer O facilitated diffusion O active transport

Question 8 Lipoplexes trapped in endosomes prevent destruction by lysosomes due to the inclusion within the liposomes of electrically neutral lipids inclusion within the liposomes of electrically charged lipids Lysosomes do not recognize them as foreign pH Question 9 Which type of reaction is represented in the following figure: saturation phase exponential phase lag phase NUMBER OF CYCLES AMOUNT OF PRODUCT

QUESTION 7 Match the organelle to its function. Nucleus A. Synthesis of secreted proteins and addition of "core" oligosaccharides B. Sequestering and storing calcium ions (Ca2+) so that its cytoplasmic concentration remains very low; also some lipid production Rough endoplasmic reticulum Smooth endoplasmic reticulum Golgi Complex C. Processing and lengthening of oligosaccharides on proteins destined for secretion Lysosome D. Hydrolysis of macromolecules using low pH and hydrolytic enzymes Endosome E. aerobic metabolism - Mitochondria F. Compartmentalization of the chromosomes in a Eukaryotic cell; therefore the site of most RNA transcription as well as ribosome assembly 1. Chloroplast G. Sequestering reactions that have products that may be damaging to the cell and destruction of those damaging compounds Peroxisome H. Internalization of material from outside of cell e.g. for nutrition or pathogen removal I. photosynthesis

Question 15 The most important job of a bacterial cell wall is to_ O prevent osmotic lysis O to prevent excess diffusion of nutrients into the cell as it ag O prevent dehydration O to prevent viral infection