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Cell Differentiation and Specialization — Unit test Answers

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Which structure is found in the cytoplasm of a prokaryotic cell, but is not found in the cytoplasm of a eukaryotic cell?

A
DNA
B
ribosomes
C
nucleus
D
mitochondria
22
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Which type of cells are the least limited in differentiation?

A
adult stem cells
B
embryonic stem cells
C
amniotic fluid stem cells
D
somatic stem cells
23

How has the study of mitosis affected scientists’ knowledge of cancer?

A
It led to a study of how to induce cancer cells to divide more rapidly.
B
It led to an understanding of how cancer cells divide so rapidly.
C
It led to the development of contact-inhibition regulators.
D
It led to the discovery of how to prevent cancer cells from dividing.
24

How is mitochondrial DNA (mtDNA) typing used in forensic science?

A
A suspect’s mtDNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
B
A suspect’s mtDNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.
C
A suspect’s nuclear DNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
D
A suspect’s nuclear DNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.
25

A scientist is comparing the outer layer of an onion cell to the outer layer of a human skin cell. What is unique about the outer layer of the onion cell compared to the skin cell?

A
It contains proteins.
B
It contains cellulose.
C
It contains carbohydrates.
D
It is selectively permeable.

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