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ASU BIO 181 EXAM 1- QUESTIONS & ANSWERS
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ASU BIO 181 EXAM 1- QUESTIONS & ANSWERS
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ASU BIO 181 EXAM 1- QUESTIONS &ANSWERS
Molecular motors run on which two cytoskeletal filament systems? Correct Ans-ACTIN
FILAMENTS AND MICROTUBULES
Chromosomes are made out of Euchromatin. Correct Ans-FALSE
The diameter of an intermediate filament is 25 nm. Correct Ans-FALSE
Where is the histone H1 found? Correct Ans-Used as a staple to attach DNA to nucleosomes
Cilia and microvilli contain a similar number of parallel actin filaments. Correct Ans-FALSE
The actin filament system is present in the nucleus. Correct Ans-FALSE
Consider the geography of cells. Actin filaments are present in the cell's ___ and the
microtubules are present in the cell's Correct Ans-CELL CORTEX; CELL INTERIOR
The actin filament system extends outside of the cell. Correct Ans-FALSE
Molecular motors use ATP as the energy source to power the molecular motors. Correct Ans-
TRUE
What does the nucleosomal core have in it (i.e., the basket ball like structure on the
slides)? Correct Ans-(2 H2A, 2 H2B, 2 H3, 2H4)
, To get into the nucleus a component has to have the correct signal sequence and pass through a
nuclear pore. Correct Ans-TRUE
Which cytoskeletal filament system lines the inside of the nucleus to protect it? Correct Ans-
Intermediate filament system.
Lamins are type V intermediate filament proteins.
The other point where MAPK can become active is ____________ of the cell cycle. Correct
Ans-M-PHASE
For a cell to respond to a ligand released from a cell and uses the circulatory system to get to
the responding cell it is called ____________ communication. Correct Ans-ENDOCRINE
There are two basic forms of cytoplasmic signaling (i.e. signal transduction). One uses
____________ and the other uses ____________. Correct Ans-CALCIUM SIGNAL, PROTEIN
KINASES
When a cell "talks to itself" it is called ____________ communication. Correct Ans-
AUTOCRINE
There are two basic types of communication within cells. One type is called ____________
signaling and it takes days to weeks to occur. The other type is called _________ communication
and it takes minutes to hours to act. Correct Ans-NUCLEAR, CYTOPLASMIC
Two types of second messengers discussed in lecture can exist downstream of a plasma
membrane receptor. These are ____________ and ____________. Correct Ans-GTP BINDING
PROTEINS & ADENYLYL CYCLASE
There is communication between cells and communication ____________ cells. Correct Ans-
WITHIN
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