Chapter 3, Problem 17MIC

Our cells need glucose for energy. When blood glucose is low, glucose must still be moved into our cells against its concentration gradient, using energy from ion gradients. The process used to bring glucose in under these conditions is: a) facilitated diffusion through a channel b) secondary active transport c) osmosis d) facilitated diffusion through a carrier e) primary active transport

Typically, our cells have a high concentration of sodium ions outside and a low concentration of sodium ions inside. Sodium ions continue to move out of the cell by the process of: a) secondary active transport b) pinocytosis c) facilitated diffusion d)simple diffusion e) primary active transport f) osmosis

Osmosis, the diffusion of water is distinct from the diffusion of oxygen because a) oxygen is a dissolved gas b) water is a solvent c) water is a large molecule d) water is non-polar

Bacteria can make polyribosomes (polysomes) which help them produce a large amount of proteins quickly. True or false?

You have two types of cells (animal cells and plant cells) that you will place in a variety of conditions. Please describe what would happen to each of those two cells in the following solutions, i) isotonic solution; ii) hypertonic solution; iii) hypotonic solution.

Why is oxygen toxic to some bacteria?

The following table depicts the rate of transport of a molecule into a cell as the external concentrations are changed. Based on what you know about the characteristics of membrane transport, the molecule is most likely transported by: a) passive transport b) simple diffusion across the membrane c) facilitated diffusion d) active transport

In which of these processes does a phosphoester, NOT break? a)ATP Hydrolysis b)Nuclease activity c)Protein phosphorylation d)Proteolysis at P residues e)All of the above break phosphoesters

there is a cellular sack that is impermeable to starch molecules and is filled with a solution, comprised of 20% starch. it is placed in a container of 100% distilled water?  a) what term descibes the solution in the sack compared to the solution surronding it? i) hypertonic ii) hypotonic iii) isotonic b) in which direction will the water molecules move faster? i) into the cell ii) out of the cell iii) same in both iv) not at all c) in which direction will the starch molecules move? i) into the cell ii) out of the cell iii) same in both iv) not at all  i'm stuck on this hw question. i think the answers are a) hypertonic, b) out of the cell, and c) not at all. but i'm not sure if those are correct and need clarification on this, thank you!