Which is not correct about Mycobacterium species?
A. It is an acid-fast bacterium.
B. Cells appear as long, slender rods via microscopy.
C. All species are human pathogens.
D. It exhibits a very slow growth rate.
E. Cell walls have waxy lipids.
Answer: C
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Transmission genetics ____
a. studies the pattern of inheritance as traits are passed from generation to generation b. reconstructs the pattern of inheritance associated with a trait as it passes through several generations c. maps genes to study chromosome structure and abnormalities in chromosome numbers and organization d. uses recombinant DNA technology to identify, isolate, and produce millions of copies of genes that can be studied in the laboratory e. sequences the complete human genome
Bone mass typically increases until we turn
a. 10. b. 15. c. 25. d. 35. e. 45
Which one of the following describes an event that takes place during gene regulation at the level of the chromosome?
A. Chromatin becomes condensed in order for transcription to begin. B. Chromatin coils so it can become more accessible to the proteins that carry out transcription. C. RNA polymerase and associated proteins bind to nucleosomes. D. Chromatin is remodeled and nucleosomes are repositioned so that specific regions of the DNA can be made available for transcription. E. Cytosine bases in the sequence near the promoter of a gene become methylated in order to stimulate transcription.
Which characteristic distinguishes growth factors from other micronutrients?
a. Cells are unable to biosynthesize them. b. They are essential for growth. c. They have only monovalent ions. d. They have an organic composition.