Microvilli are found on cells of the inner surface of the small intestine, where they
A) slow the movement of food through the digestive tract.
B) increase the absorption of nutrients from digested food.
C) sense the presence of food in the digestive tract.
D) push food along the digestive tract.
E) protect the intestinal lining from irritants or toxins in the food.
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Question 2) Which of following properties of the cytoskeleton is incorrect?
A) supports organelles
B) controls cell shape
C) provides cell strength
D) connects cells to each other
E) moves organelles
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Question 3) Which of following properties of microtubules is correct?
A) made of myosin
B) made of actin
C) found only in the terminal web
D) another term for microfilaments
E) interact with dynein and kinesin
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Question 4) Which of the following cytoskeleton components moves the chromosomes during cell division?
A) microfilaments
B) intermediate filaments
C) thick filaments
D) microtubules
E) basal bodies
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Question 5) Microfilaments
A) are usually composed of myosin.
B) are hollow, filamentous structures.
C) anchor the cytoskeleton to integral proteins of the cell membrane.
D) interact with filaments composed of tubulin to produce muscle contractions.
E) are found in the cytoplasm radiating away from the centrosome.
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Question 6) Microfilaments do not
A) anchor the cytoskeleton to membrane proteins.
B) help determine the consistency of cytoplasm.
C) produce cell movement, with myosin.
D) consist of the protein called actin.
E) distribute chromosomes to opposite ends of a dividing cell.
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Question 7) Tubulin is to microtubules as actin is to
A) ribosomes.
B) microfilaments.
C) intermediate filaments.
D) flagella.
E) microvilli.
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Question 8) Match the organelle (1-4 ) with the correct description (5-8). 1 ) mitochondrion 5 ) synthesizing molecules 2 ) centriole 6 ) liquid in cell 3 ) endoplasmic reticulum 7 ) provides cell with energy 4 ) cytosol 8 ) aids the formation of the spindle apparatus
A) 1 and 7, 2 and 6, 3 and 8, 4 and 5
B) 1 and 8, 2 and 5, 3 and 6, 4 and 7
C) 1 and 7, 2 and 8, 3 and 5, 4 and 6
D) 1 and 5, 2 and 6, 3 and 7, 4 and 8
E) 1 and 6, 2 and 8, 3 and 5, 4 and 7
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Question 9) Each of the following is an example of a nonmembranous organelle except
A) lysosomes.
B) cilia.
C) centrioles.
D) ribosomes.
E) cytoskeleton.
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Question 10) ________ are compartments within the cell whose contents are isolated from the cytosol.
A) Cytoskeleton
B) Microvilli
C) Nonmembranous organelles
D) Membranous organelles
E) Ribosomes
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