ASU BIO 181 Exam 1 (2025//2026) | Verified Actual Questions &
Detailed Answers – Brand New Version
Actin Filaments are present in: - ANSWER: The cell's cortex
Microtubules are present in: - ANSWER: The cell's interior
Cytokinesis in plant and animal cells takes two forms: - ANSWER: 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 _____. - ANSWER: Histone Kinase
Chromosomes
The _____ begins to be destroyed at the Metaphase of the cell cycle causing the
chromosomes to begin to _____. - ANSWER: Cyclin B1
Decondense
The activation of both MPF and MAPK result in _____ _____ of the cytoplasm during M-
phase. - ANSWER: 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
_____ _____. - ANSWER: Cell cycle
Cell cycle
Two types of second messengers discussed in lecture can exist downstream of a plasma
membrane receptor. These are _____ and _____. - ANSWER: Cyclic AMP
MAP Kinase
, There are two basic forms of cytoplasmic signaling (i.e signal transduction). One uses _____
and the other uses _____. - ANSWER: Protein Kinases
Calcium Signal
What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - ANSWER: 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.
Is a cancer cell anchorage independent and immortal, or is it anchorage dependent and
mortal? Do they exhibit contact inhibition? - ANSWER: 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: - ANSWER:
Hydrophilic.
What limits the paramecium from acquiring more complex functions? - ANSWER: The
paramecium cannot fit any more biomachinery into its space.
What limits an individual cell from becoming more complex? - ANSWER: Division of
labor.
T/F: In your own multicellular body, different cells have a division of labor between them: -
ANSWER: True.
T/F: A normal cell is anchorage-dependent for growth and mortal: - ANSWER: True.
Comparing a single-celled Eukaryotic organism with a multi-cellular organism such as
yourself, what is the major difference: - ANSWER: Division of labor.
T/F: In your own multicellular body, cells with different functions have different DNA: -
ANSWER: False.
Detailed Answers – Brand New Version
Actin Filaments are present in: - ANSWER: The cell's cortex
Microtubules are present in: - ANSWER: The cell's interior
Cytokinesis in plant and animal cells takes two forms: - ANSWER: 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 _____. - ANSWER: Histone Kinase
Chromosomes
The _____ begins to be destroyed at the Metaphase of the cell cycle causing the
chromosomes to begin to _____. - ANSWER: Cyclin B1
Decondense
The activation of both MPF and MAPK result in _____ _____ of the cytoplasm during M-
phase. - ANSWER: 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
_____ _____. - ANSWER: Cell cycle
Cell cycle
Two types of second messengers discussed in lecture can exist downstream of a plasma
membrane receptor. These are _____ and _____. - ANSWER: Cyclic AMP
MAP Kinase
, There are two basic forms of cytoplasmic signaling (i.e signal transduction). One uses _____
and the other uses _____. - ANSWER: Protein Kinases
Calcium Signal
What is the difference between a single-pass transmembrane protein and a 7-pass
transmembrane protein? - ANSWER: 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.
Is a cancer cell anchorage independent and immortal, or is it anchorage dependent and
mortal? Do they exhibit contact inhibition? - ANSWER: 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: - ANSWER:
Hydrophilic.
What limits the paramecium from acquiring more complex functions? - ANSWER: The
paramecium cannot fit any more biomachinery into its space.
What limits an individual cell from becoming more complex? - ANSWER: Division of
labor.
T/F: In your own multicellular body, different cells have a division of labor between them: -
ANSWER: True.
T/F: A normal cell is anchorage-dependent for growth and mortal: - ANSWER: True.
Comparing a single-celled Eukaryotic organism with a multi-cellular organism such as
yourself, what is the major difference: - ANSWER: Division of labor.
T/F: In your own multicellular body, cells with different functions have different DNA: -
ANSWER: False.
