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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
bacterial cell
B
virus
C
plant cell
D
prokaryote
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
The electron microscope was used for the first time
B
New microscopes provided better viewing of cells
C
Scientists invented the microscope in the mid 1800s
D
Hooke's Micrographia inspired both theories
3) Which statement would not be included in a summary of the cell theory?
A
the cell is the basic unit of organizaiton
B
all organisms are made of at least one cell
C
all cells come from other, preexisting cells
D
all cells contain a nucleus that controls cell division
4) In what decade did the cell theory become an accepted part of biology?
A
1850s
B
1620s
C
1940s
D
1980s
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
not enough info to decide
B
animal
C
bacteria
D
plant
6) Which statement is true about bacterial cells?
A
they have organelles
B
the cells have no nucleus
C
they are eukaryotes
D
the cells are very large
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
chloroplasts and a cell wall
C
ribosomes and vacuoles
D
a cell membrane and mitochondria
8) Which scientist revolutionized the way biologists think about the evolutionary history of eukaryotes?
A
Virchow
B
Everett
C
Margulis
D
Pasteur
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 higher
B
100 times higher
C
500 times lower
D
100 times lower
10) Which defines a cell?
A
the smallest type of animal
B
microscopic organisms in water
C
the basic unit of living things
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 polar.
B
Cholesterol is nonpolar.
C
Cholesterol is repelled by the polar tails.
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
membrane protein
C
carbohydrate chain
D
transport protein
13) Where are you least likely to find water in the phospholipid bilayer?
A
between fatty acid tails
B
polar phosphate heads
C
transport protein
D
carbohydrate
14) 19. What would happen to the phospholipid bilayer if cholesterolIt would become more rigid. is completely removed?
A
It would disintegrate.
B
It would have holes in it.
C
It would collapse in on itself.
D
It would become more rigid.
*select an answer for all questions
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