What is the best definition of an organ?
a. a single type of tissue
b. a type of glandular tissue
c. two or more tissues working together to perform a specific task
d. muscle tissue that has differentiated from stem cells
e. a collection of cells and interstitial fluid
ANSWER: c
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Which of the following is NOT a characteristic of bacterial chromosomes?
A. They are single stranded. B. They are around 10? smaller than eukaryotic chromosomes. C. They contain gene coding regions and regulatory regions. D. They have 10-base-pair regions that control DNA folding. E. They have only one origin of replication.
A constitutive mutation in the lac operon may be of several types. Name two types of constitutive mutations
What will be an ideal response?
The latent form of a bacteriophage genome that exists when a phage establishes lysogeny is called a ________.
A. lysogen B. prophage C. prion D. viroid
The majority of microorganisms found in humans and their environment are pathogenic.
a. true b. false