BIO 110: Final Exam: info from Exam 2: test form A
The formation of which structure labeled in the figure above (A, B, or C) is blocked by the Tuberculosis bacteria?
B
Which structure labeled in the figure above (A, B, or C) best represents a secondary lysosome?
B
A symporter is a carrier protein that will
transport two different molecular species in the same direction at the same time
In the figure above, which is labeled structure (A, B, C, or D) best represents a hydrophobic area of the plasma membrane?
B
As the radius of a spherical cell ___#1___, its surface area, and the ability of the cell to successfully support its metabolism __#3___.
#1 = increase #2=more quickly than #3= decreases
If you repeated Dr. Gorter's experiment comparing the surface area of red blood cells (RBCs) with the surface area of the phospholipids that compose the plasma membrane of RBCs, which of the following results would best represent Dr. Gorter's results?
1 m2 (total cell surface area of the RBCs) 2 m2 (total surface area of the phospholipids collected from the RBCs after lysis)
Which structure labeled in the figure above (A, B, or C) best represents a primary lysosome?
A
Which of the following is true about lysosomes?
Lysosomes may be used to break down "worn out" organelles Lysosomes contain enzymes that hydrolyze polymers
Animal cells are growing in an incubator at 37°C. The cells are then placed into an incubator at at 47°C. Which of the following is most likely to happen?
Initially, the plasma membrane of the cells becomes more fluid.
Are plant cell walls chemically similar to prokaryotic cell walls? How are they the same or different?
No, plant cell walls are made cellulose & bacterial cell alls are made of peptidoglycans
All cells fall into one of two broad categories. What are they?
Prokaryotes and Eukaryotes
What is most likely true of phospholipids that will become part of a cell's plasma membrane?
They are synthesized in the smooth ER and sent to the plasma membrane by exocytosis
What best describes the nature of the nuclear membrane?
a double phospholipid bilayer
Prokaryotic cells don't have
an endomembrane network a membrane bound nucleus
(refers to question 18) In response to being heated, how will the cells likely respond?
by generating membrane phospholipids with fatty acid chains that have fewer C=C double bonds (unsaturations)
(refers to question 18) In response to being heated, how will the cells likely respond?
by generating membrane phospholipids with longer fatty acid chains
what do facilitated diffusion and active transport have in common?
carrier proteins are used in both facilitated diffusion and active transport
In the figure above, what is likely true of the proteins labeled A (fibronectin) and C (intern)?
fibronectin is peripheral membrane protein and integral is an integral (transmembrane) protein
Which of the following is true of cell membrane fluidity?
fluidity can be regulated by varying the length and degree of saturation in the fatty acid chains of membrane phospholipids
Histones are proteins that bind to chromosomal DNA in the nucleus. Base on that knowledge, which of the following is true?
histone proteins will be synthesized by ribosomes in the cytoplasm
Lipid bilayer membranes (LBMs) are more permeable to some types of molecules than others. Which option below gives the correct order (from left to right) starting with of the types of molecules that LBMs are the least permeable to and ending with the types of molecules that LBMs are the most permeable to?
ions, small polar molecules, non-polar molecules
The results indicated by 'B' are an example of
linear kinetics
Which of the following are found in all prokaryotic and eukaryotic cells?
plasma (cell) membrane ribosomes
Which of the following is NOT a function of the extracellular metric (ECM)?
reinforcing structures within cells that allow mobile cells to move
To be considered alive an organism MUST be able to
reproduce grow & metabolize
The results indicated by 'A' are an example of
saturation kinetics
The photo-bleaching experiments we discussed in class demonstrated
that fluid mosaic model of plasma membranes
Evert Gorter's experiment with red blood cells demonstrated
that plasma membranes are phospholipid bilayers
Which of the following have no physical contact with the plasma membrane cells?
the extracellular matrix the cytoskeleton integral proteins ALL OF THE ABOVE MAKE PHYSICAL CONTACT WITH THE PLASMA MEMBRANE OF CELLS
Where precisely are ribosomes assembled in eukaryotic cells?
the nucleolus
Within the chloroplast there is a thick liquid substance called
the stroma
You are doing an experiment to determine whether a membrane transport portion is a channel protein pr a carrier protein. You measure how the rate at which the protein transports a solute across the membrane changes in response to increasing concentrations of the solute that the protein transports. If you get the results indicated by 'A' you can conclude that
the transport protein is a carrier protein
If you get the results indicated by 'B' you can conclude that
the transport protein is a channel protein
Evert Gorter used red blood cells (RBCs) in his experiment for several good reasons. Which reason below is the most important reason that he used RBCs?
within an individual organism all RBC's are the same size