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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
bacterial cell
D
virus
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
Scientists invented the microscope in the mid 1800s
B
The electron microscope was used for the first time
C
New microscopes provided better viewing of cells
D
Hooke's Micrographia inspired both theories
3) Which statement would not be included in a summary of the cell theory?
A
all cells come from other, preexisting cells
B
all cells contain a nucleus that controls cell division
C
the cell is the basic unit of organizaiton
D
all organisms are made of at least one cell
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
not enough info to decide
C
plant
D
bacteria
6) Which statement is true about bacterial cells?
A
the cells are very large
B
the cells have no nucleus
C
they have organelles
D
they are eukaryotes
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 cell membrane and mitochondria
B
a nucleus and ribosomes
C
ribosomes and vacuoles
D
chloroplasts and a cell wall
8) Which scientist revolutionized the way biologists think about the evolutionary history of eukaryotes?
A
Margulis
B
Pasteur
C
Virchow
D
Everett
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
500 times lower
B
100 times higher
C
500 times higher
D
100 times lower
10) Which defines a cell?
A
protein molecules in animals
B
the basic unit of living things
C
the smallest type of animal
D
microscopic organisms in water
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 nonpolar.
B
Cholesterol is repelled by the polar tails.
C
Cholesterol is polar.
D
A high cholesterol diet should be avoided.
12) Which substance on the plasma membrane helps identify chemical signals from outside the cell?
A
cholesterol
B
carbohydrate chain
C
transport protein
D
membrane protein
13) Where are you least likely to find water in the phospholipid bilayer?
A
polar phosphate heads
B
transport protein
C
between fatty acid tails
D
carbohydrate
14) 19. What would happen to the phospholipid bilayer if cholesterolIt would become more rigid. is completely removed?
A
It would have holes in it.
B
It would become more rigid.
C
It would collapse in on itself.
D
It would disintegrate.
*select an answer for all questions
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