How does a fermenter generate proton motive force (PMF) to drive active transport?
A. Fermenters cannot generate proton motive force.
B. Fermenters use an electron transport chain for this purpose.
C. Fermenters can reverse the direction of the ATP synthase to generate PMF.
Answer: C
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Which of the following blood cells fights infections?
A) Red blood cells B) Platelets C) White blood cells D) Hemoglobin
Parents with the dominant phenotype cannot have offspring with the recessive phenotype.
A. False, because both parents could carry the recessive allele. B. True, because the dominant gene must be passed down from each parent. C. False, because one parent could carry the recessive allele. D. True, because at least one dominant gene will be passed down from each parent. E. True, because both parents have the dominant allele.
The presence of ____ distinguishes eukaryotes from prokaryotes?
a. plasma membrane b. ribosomes c. nucleus and membrane bound organelles d. genetic material
Capsules of pathogenic enteric bacteria are virulence factors because they _____.
A) Capture iron from hemoglobin and store it in the bacteria B) Release hemolysins that destroy red blood cells C) Produce fimbriae that enable the bacteria to attach to human cells D) Protect the bacteria from phagocytosis and from antibodies