In gram negative bacteria a pilus allows it to
A) attach to surfaces, aiding in the formation of
biofilms.
B) move using an "oarlike" motion.
C) transfer genetic material.
D) infect their host.
Ans: C) transfer genetic material.
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What is an average concentration of prokaryotic cells along the surface of pelagic water?
A) 104 cells/ml B) 106 cells/ml C) 108 cells/ml D) 1010 cells/ml
Which of the following statements explains why all of the F1 females from a cross between a red-eyed homozygous female and a white-eyed male are heterozygous?
A. The male parent provides them with a white-eye allele on the X and a red-eye allele on the Y. B. The male parent provides them with a white-eye allele on the X, and the female parent provides them with a red-eye allele on the Y. C. The male parent provides them with a white-eye allele on the X, and the female parent provides them with a red-eye allele on the X. D. The female parent provides two X chromosomes to each daughter who both carry the red-eye allele. E. None of the answer options is correct.
The macromolecule containing alternating N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) chains cross-linked by short peptide fragments is ________.
A. teichoic acid B. mycolic acid C. lysozyme D. lipopolysaccharide E. peptidoglycan
Gene therapy can be used to treat
a) cystic fibrosis b) Zika virus infections. c) antibiotic-resistant S. aureus infections. d) avian influenza A infections.