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Ch 7 Review Questions
Test Description: Review for ch 7 test
Instructions: Answer all questions to get your test result.
1) In which structure would you find a nucleus?
A
prokaryote
B
plant cell
C
virus
D
bacterial cell
2) Both Schwann and Virchow developed important theories about cells in the mid 1800s. Which best explains the reason these theories were made within a few years of each other?
A
Hooke's Micrographia inspired both theories
B
New microscopes provided better viewing of cells
C
The electron microscope was used for the first time
D
Scientists invented the microscope in the mid 1800s
3) Which statement would not be included in a summary of the cell theory?
A
all cells contain a nucleus that controls cell division
B
the cell is the basic unit of organizaiton
C
all organisms are made of at least one cell
D
all cells come from other, preexisting cells
4) In what decade did the cell theory become an accepted part of biology?
A
1850s
B
1620s
C
1980s
D
1940s
5) A scientist at the polar ice cap was studying an ice sample. While examining it, he found some cell from many years ago. He ID'd these structures: cytoskeleton, mitochondria, nucleus, cell wall, ribosomes. What kind of organism did he find?
A
animal
B
bacteria
C
not enough info to decide
D
plant
6) Which statement is true about bacterial cells?
A
the cells are very large
B
they are eukaryotes
C
the cells have no nucleus
D
they have organelles
7) On a laboratory exam, a student is asked to determine if the cells under a microscope are plant cells or animal cells. What might the student look for?
A
a nucleus and ribosomes
B
a cell membrane and mitochondria
C
chloroplasts and a cell wall
D
ribosomes and vacuoles
8) Which scientist revolutionized the way biologists think about the evolutionary history of eukaryotes?
A
Everett
B
Virchow
C
Pasteur
D
Margulis
9) An electron microscope can magnify an object about 500,000 times. How does this magnification compare with the magnification of a compound light microscope?
A
100 times lower
B
500 times higher
C
500 times lower
D
100 times higher
10) Which defines a cell?
A
the basic unit of living things
B
microscopic organisms in water
C
the smallest type of animal
D
protein molecules in animals
11) Cholesterol is repelled by water and can be found between the layers of the phospholipids in the plasma membrane. What can be concluded from this information?
A
Cholesterol is repelled by the polar tails.
B
Cholesterol is nonpolar.
C
A high cholesterol diet should be avoided.
D
Cholesterol is polar.
12) Which substance on the plasma membrane helps identify chemical signals from outside the cell?
A
membrane protein
B
transport protein
C
cholesterol
D
carbohydrate chain
13) Where are you least likely to find water in the phospholipid bilayer?
A
polar phosphate heads
B
carbohydrate
C
between fatty acid tails
D
transport protein
14) 19. What would happen to the phospholipid bilayer if cholesterolIt would become more rigid. is completely removed?
A
It would become more rigid.
B
It would collapse in on itself.
C
It would disintegrate.
D
It would have holes in it.
*select an answer for all questions
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