Biotechnology includes all of the following except
A. modifying antibiotics with different chemical functional groups to increase their potency.
B. using genetically-modified E. coli as a tool to detect cancer.
C. using bacterial insecticidal proteins as a means to combat mosquitoes as disease vectors.
D. using bacterial antifreeze proteins to protect crops from lethal frosts.
Answer: A
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Draw two cells: one showing the arrangement of chromosomes at metaphase of mitosis, and the other showing the
chromosomes at metaphase I of meiosis. What is the significance of this difference? What will be an ideal response?
What conclusion was associated with mutant strain III in the accompanying figure?
a. It contained all the enzymes needed for normal metabolism.
b. It was missing all the enzymes for metabolism of amino acids.
c. It was missing the enzyme that catalyzes the conversion of citrulline to arginine.
d. It was missing the enzyme that catalyzes the conversion of ornithine to citrulline.
e. It was missing the first enzyme in the arginine metabolic pathway.
Mom and dad come to you, their doctors, and report no dirty diapers after feedings. Their now 3-day-old baby isn't pooping, and they feel something is wrong. Which of the following reasons could possibly explain this?
a. The baby hasn't eaten enough. b. There is a blockage somewhere in the baby's digestive track. c. The baby has no bacteria in its gut. d. The digestive enzymes in the gut are not functioning properly.
A visitor to an American tropical forest will probably never get to see a jaguar, the largest native cat species in the Americas, but will see many plant-eating monkeys. Use your knowledge of energy pyramids to explain the rarity of the predatory cats
What will be an ideal response?