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BIO 219 Exam 1: Questions With Proper Solutions
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BIO 219 Exam 1: Questions With Proper SolutionsTrue or False? The cell is mostly empty, with only a few organelles inside.
Right Ans - False
Which of the following is a function of the cytoskeleton?
A) it provides shape
B) it provides organization
C) it provides motility/movement
D) all of the above Right Ans - all of the above
Which of the following is not a way that microfilaments are organized?
A) nets
B) parallel
C) antiparallel
D) all of these Right Ans - D) all of these
Which of the following is not a component of the cytoskeleton?
A) intermediate filaments
B) macrofilaments
C) microfilaments
D) microtubules Right Ans - B) macrofilaments
True or False? The cytoskeleton can rapidly change shape in response to
movement. Right Ans - True
Which of the following describes signals sent from nearby cells?
A) endocrine signaling
B) paracrine signaling
C) autocrine signaling Right Ans - B) paracrine signaling
Which of the following is NOT a part of receptors?
A) extracellular domain
B) transmembrane domain
C) nuclear domain
D) intracellular domain Right Ans - C) nuclear domain
Which of the following could be a ligand for a receptor?
A) proteins/peptides
, B) steroids/ hormones
C) lipids
D) gases
E) all of the above Right Ans - E) all of the above
True or False? The extracellular matrix is mostly empty, with few proteins.
Right Ans - False
Which of the following uses transmembrane proteins from cells to glue cells
together to make tissues?
A) adhesive junctions
B) tight junctions
C) gap junctions
D) conjunction junctions Right Ans - A) adhesive junctions
Cells that can crawl depend on the ability to move proteins from the back of
the cell to the front of the cell using microtubules as tracks. Which of the
following is NOT true of microtubules?
A) microtubules grow equally well at the end + and - ends.
B) microtubules are made from protein dimers.
C) the interaction of microtubule subunits is a quaternary structure.
D) the microtubules are larger than microfilaments and intermediate
filaments. Right Ans - A) microtubules grow equally well at the + end and -
ends.
Microtubule subunits must bind to which of the following to grow and be
stable?
A) ATP
B) ADP
C) GTP
D) GDP Right Ans - C) GTP
The different cytoskeletal proteins are defined by their subunits and
characteristics. Which of the following cytoskeletal components does NOT
have inherent polarity?
A) microfilaments
B) intermediate filaments
C) microtubules
D) they all have polarity Right Ans - B) intermediate filaments
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