Spindle fibers (microtubules) attach to a chromosome's ________ during mitosis.

A) centromere

B) telomere

C) genomere

D) euchromatin


A) centromere

Biology & Microbiology

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Which of the following does not reflect the action of an effector molecule on the transcription of a gene?

A. An effector binds to a repressor to decrease the level of transcription. B. An effector binds to a repressor to increase the level of transcription. C. An effector binds to an activator to increase the level of transcription. D. An effector binds to a polymerase to increase the level of transcription.

Biology & Microbiology

Which rapidly growing Aspergillus spp. (2 to 6 days) best describes a mold that produces a fluffy-to-granular, white-to-blue green colony?

a. A. niger b. A. flavus c. A. fumigatus d. A. terreus

Biology & Microbiology

Enveloped viruses ____

a. generally lyse host cells as they are released b. synthesize envelope lipids as they replicate within the host cell c. acquire their envelope as they bud from the host cell d. acquire their envelope as they enter the host cell e. always contain DNA genomes

Biology & Microbiology

Xylem and phloem are types of

a. ground tissue. b. protoderm. c. vascular tissue. d. meristem. e. dermal tissue.

Biology & Microbiology