In a typical eukaryotic cell the surface area to volume ratios of the endoplasmic reticulum relative to the cytosol volume, the mitochondrial cristae relative to the matrix volume, and the thylakoid membranes relative to the stroma volume are all high. This implies that

A eukaryotic cell contains an organelle of prominent genetic importance that prokaryotic cells and virsues lack. What is this organelle?

What is cytoplasmic streaming? What problem for larger cells is addressed by cytoplasmic streaming

Why do cells lack membrane transport proteins that are specific for the movement of Oxygen?

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

Pinocytosis can bring all of the following substances into most eukaryotic cells, with the exception of: the human immunodeficiency virus (HIV) vitamin B12 an erythrocyte (red blood cell) iron the influenza virus

Diatomic oxygen (O2) exhibits which of the following membrane transport movements? A. it is not able to cross the membrane by passive transport, because it is big, polar, and inorganic it is not able to cross the membrane by active transport, because it is big, polar, and inorganic it is able to cross the membrane by facilitated diffusion, because it is small, polar, and organic it is able to cross the membrane by active transport, because it is big, nonpolar, and organic it is able cross the membrane by simple diffusion, because it is small, nonpolar, and inorganic

Paramecium caudatum lives in a hypotonic solution. Excess water is removed from the cell via structures called contractile vacuoles. Given what you know about vacuoles (refer to Table 3.3, p. 68) and what you know about cells able to contract, suggest the type of transport that occurs when water is moved out of Paramecium.

Facilitated diffusion and active transport are two different mechanisms that the cells use to transport molecules into and out of the cell. Compare and contrast these two types of cellular transport.

The endoplasmic reticulum (ER) and Golgi apparatus are two organelles that are not physically joined, yet materials can still be exchanged between them. How can materials, such as proteins, move between the ER and Golgi when these organelles are not touching each other? A) When a substance such as a protein needs to move between these organelles, it is first dismantled in one organelle, then reassembled when it arrives at the other organelle. B) Substances such as proteins can travel between these organelles within transport vesicles. C) None of these; a single molecule will not go from one organelle to another. D) Substances like proteins will move between these organelles by diffusion through the cytoplasm. ..