Porins are channels in the outer membranes of gram-positive Bacteria
Indicate whether the statement is true or false.
Answer: FALSE
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What percentage of Earth's productive land is currently used by the human population for crops and livestock?
A) 20% B) 75% C) 40% D) 55% E) 90%
Which statement about locomotion is true?
A) Locomotion requires energy to overcome friction and gravity. B) Gravity is a greater locomotion problem for animals in water than for those on land. C) Overcoming friction is a greater locomotion problem for land animals than for those that live in water. D) Bone strength is more important than body shape in the locomotion of land animals.
What can be assumed from these results?
In the Ames test, mutagenicity is normally tested on a strain of bacterium (Salmonella typhimurium) that cannot synthesize the amino acid histidine. Therefore, these bacteria require histidine in the growth plate to survive. A researcher performs the Ames test to evaluate the mutagenicity of a newly synthesized compound and notices that Salmonella typhimurium is living on a histidine-free growth plate. A. The newly synthesized compound induces a mutation in the bacteria. B. The bacteria no longer produce histidine. C. The bacteria produce histidine. D. The newly synthesized compound induces a mutation in the bacteria and the bacteria no longer produce histidine. E. The newly synthesized compound induces a mutation in the bacteria and the bacteria produce histidine.
The sequencing method that cuts the DNA of an entire chromosome into small fragments and then clones these fragments is called
A. RFLP sequencing. B. clone-by-clone sequencing. C. consensus sequencing. D. shotgun sequencing.