Exam 4: Life Is Cellular

When scientists such as J.C.Venter and Daniel Gibson engineer a cell constructed with synthetic DNA in the laboratory,do they challenge accepted cell theory? If so,which part of cell theory do they challenge? Briefly explain your answer.

A cell containing a nucleus,mitochondria,Golgi apparatus,both smooth and rough ER,ribosomes,cytoskeleton,a large vacuole,and chloroplasts would be an example of a typical ________ cell.

The selective permeability of a phospholipid bilayer membrane can be increased with help from ________ proteins.

An amoeba,a protozoan that moves by pseudopodia,approaches a smaller protozoan and extends its pseudopodia (extensions of cytoplasm in plasma membrane)around the smaller protozoan.Once the amoeba's pseudopodia completely surrounds the other protozoan,the amoeba's plasma membrane pinches off by folding back into the amoeba and creating a vesicle containing the smaller protozoan.This vesicle is now within the amoeba itself and will soon fuse with other vesicles containing digestive enzymes.This is an example of

The flexible poles providing structure to a soft-sided tent most closely resemble the

The membranes of the mitochondria provide a place for enzymes needed for ________to anchor and function.

When an amoeba has digested a bit of pond scum in a vesicle and that vesicle then carries the waste products to the amoeba's cell membrane,fuses with the membrane,and releases the waste products outside of the cell,________ has occurred.

The plasma membrane of some white blood cells contain ________ proteins that bind with proteins of cells such as bacteria that have invaded the human body.

Cheryl is in a lab attempting to prepare a slide of cow blood for observation in a wet mount.She places a small drop of the blood on a slide,adds a drop of strong saline (salt)solution,and then covers all of it with a coverslip.After returning to her desk,she observes the slide with her microscope and notices that all of the red blood cells (RBCs)do not look like the nice round donut-shaped cells in her lab manual.Instead,the RBCs look very shriveled up.Her lab partner,Derek,has also made a slide,but the RBCs on his slide do look like the ones in the lab manual.Derek used a more dilute solution of saline but the same vial of blood. The most plausible explanation for the appearance of the blood cells on Cheryl's slide is that the

The enzymes needed to perform photosynthesis in plant cells are closely associated with the membranes in

Match the following cellular structures with their primary function (you may need to use a function more than once). -plasma membrane

Match the following cellular structures with their primary function (you may need to use a function more than once). -chloroplast

Examine the figure below.Assume each sugar molecule represents a percentage point of sugar dissolved in the solution.Over time,the solution level on the left side of the figure would ________,while the solution level on the right side of the figure would ________.This is because the solution on the left side of the figure is ________,while the solution on the right side of the figure is ________.

A plasma membrane is constructed of two layers of ________ ,organic molecules that have a hydrophilic head and a hydrophobic tail.

Which of the following statements best describes the differences between the nuclear envelope and the plasma membrane?

Which of the following would be likely to move through a plasma membrane by simple diffusion?

There are cells in the human pancreas that produce insulin,a peptide hormone important in the regulation of blood sugar levels by adjusting the metabolism of sugars and fats.Once the pancreas cells have produced the initial peptide (small string of amino acids)component of insulin,it must be finished,packaged,and shipped out of the cell.Which organelles would likely be involved in this process of finishing,packaging,and shipping of a peptide hormone? Include a brief,general description of what happens to the hormone at each organelle and the plasma membrane.

Match the following cellular structures with their primary function (you may need to use a function more than once). -nucleus

A solid waste (garbage)transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

Martin observes a wet mount slide preparation using the compound light microscope in the lab room.He observes layers of cells that have a definite,rigid,rectangular shape; there appears to be a nucleus in all of the cells and there are many oval-shaped green structures that seem to be moving around inside of the cells in an orderly fashion.What general cell type is he MOST likely observing?