Isotopes of the same element differ from each other in the number of

a. electrons and protons.
b. neutrons only.
c. protons and neutrons.
d. electrons only.
e. protons, neutrons, and electrons.


B

Biology & Microbiology

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Any cell can present an antigen on a class II major histocompatibility complex (MHC) protein.

a. true b. false

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Genes that jump from one location to another in the genome are

A. transformers. B. repressors. C. plasmids. D. transposons. E. operons.

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Where is the thermosome found, and what is its apparent role?

What will be an ideal response?

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Which of the following ECM molecules provides tensile strength?

A. fibronectin B. collagen C. laminin D. elastin E. proteoglycan

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