ASU BIO 181 Exam 1 Questions and complete solutions
Actin Filaments are present in: CORRECT ANSWERS The cell's cortex
Microtubules are present in: CORRECT ANSWERS The cell's interior
Cytokinesis in plant and animal cells takes two forms: CORRECT ANSWERS Animal: Contractile Ring Formation
Plant: Phragmoplast Formation
An important checkpoint regulator is at the Gap 2/M-phase transition. Here, Cyclin B and cdkl1 activate and form MPF which becomes a _____ _____ and causes DNA to condense into _____.CORRECT ANSWERS Histone Kinase Chromosomes The _____ begins to be destroyed at the Metaphase of the cell cycle causing the chromosomes to begin to _____. CORRECT ANSWERS Cyclin B1 Decondense The activation of both MPF and MAPK result in _____ _____ of the cytoplasm during M-phase.CORRECT ANSWERS Settling down MAPK has two different functions depending on where this Kinase acts in the _____ _____. If the Kinase becomes active during interphase, the cell is triggered to progress through the _____ _____. CORRECT ANSWERS Cell cycle Cell cycle Two types of second messengers discussed in lecture can exist downstream of a plasma membrane receptor. These are _____ and _____. CORRECT ANSWERS Cyclic AMP MAP Kinase There are two basic forms of cytoplasmic signaling (i.e signal transduction). One uses _____ and the other uses _____. CORRECT ANSWERS Protein Kinases Calcium Signal What is the difference between a single-pass transmembrane protein and a 7-pass transmembrane protein? CORRECT ANSWERS A single pass TMP is a singular protein that passes once through the bilayer. A 7-pass protein passes through the bilayer 7 times, creating a channel for ions to pass through. A single pass TMP cannot create an ion channel. 1 / 2
Is a cancer cell anchorage independent and immortal, or is it anchorage dependent and mortal?Do they exhibit contact inhibition? CORRECT ANSWERS They are anchorage independent and immortal, and they do not exhibit contact inhibition, because they continue to grow despite their surroundings.If something is soluble in water, a hydration forms around it and it is termed: CORRECT ANSWERS Hydrophilic.What limits the paramecium from acquiring more complex functions? CORRECT ANSWERS The paramecium cannot fit any more biomachinery into its space.What limits an individual cell from becoming more complex? CORRECT ANSWERS Division of labor.T/F: In your own multicellular body, different cells have a division of labor between them: CORRECT ANSWERS True.T/F: A normal cell is anchorage-dependent for growth and mortal: CORRECT ANSWERS True.Comparing a single-celled Eukaryotic organism with a multi-cellular organism such as yourself,
what is the major difference: CORRECT ANSWERS Division of labor.
T/F: In your own multicellular body, cells with different functions have different DNA: CORRECT ANSWERS False.
A single celled Eukaryotic organism: CORRECT ANSWERS Has a limited number of
biomolecular machines Must find food, shelter, a mate, and reproduce Must escape from predators The paramecium discussed in class has contained an organelle called the contractile vacuole.
This is the presumed precursor of the: CORRECT ANSWERS Kidney.
T/F: A cell that is anchorage-dependent for growth will also exhibit contact inhibition: CORRECT ANSWERS True.In order to examine cells that are smaller than can be detected by the human eye, what needs to be used? CORRECT ANSWERS Technology.
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