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Body System Psoriasis Carbohydrates, Proteins and Lipids Neuroanatomy Vocabulary - Health Virus and Bacteria Mechanical Digestion Bonding and the Periodic Table The Microbial World Human Physiology PHYSIOLOGY OF KIDNEY Anatomy and Histology of Stomach The Brain Our Control Center Health Unit Coordinating Biochemistry/Cells

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Microbiology › View

Which lymphocytes lack specificity for antigen and attack cancer cells and virus-infected cells?

A. Natural killer (NK) cells

B. Cytotoxic T cells

C. Helper T cells

D. Delayed hypersensitivity T cells

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Enzymes › View

What does the specificity of an enzyme refer to?

A. The ability of an enzyme to speed up any chemical reaction.

B. The ability of an enzyme to act on multiple substrates.

C. The ability of an enzyme to act only on one specific substrate.

D. The ability of an enzyme to change its shape to fit any substrate.

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