The primary function of an enzyme or any biological catalyst is to

A. reduce the energy of activation of a reaction.
B. increase the rate of a reaction.
C. increase the rate of a reaction and change the direction of a reaction.
D. reduce the energy of activation and increase the rate of a reaction.
E. change the direction of a reaction.


D. reduce the energy of activation and increase the rate of a reaction.

Biology & Microbiology

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A 76-year-old man with intermittent fevers has blood cultures drawn three times. The second set is positive and grew out of a Corynebacterium spp. This organism is considered:

a. pathogenic. b. virulent. c. a contaminant. d. normal flora.

Biology & Microbiology

Collagen is a tough, stretch-resistant protein. You would be most likely to find collagen in which tissue type?

A. Nervous B. Muscle C. Epithelial D. Connective E. Epithelial and connective tissue

Biology & Microbiology

Describe at least three direct and indirect ways in which the oceans influence the lives of humans

What will be an ideal response?

Biology & Microbiology

A conservation manager is planning to reintroduce collared lizards into an isolated glade in Missouri,

where she assumes they have gone locally extinct. Several other isolated glades in the region have populations of collared lizards from which she can draw. Based on your understandings of phylogenetics, provide arguments for why she should draw individuals from a single extant glade population versus from multiple extant glade populations to repopulate the empty glade. What tools might she use to make this decision?

What will be an ideal response?

Biology & Microbiology