Expressed sequence tags (ESTs) allow researchers to identify
A) genes that encode proteins.
B) microsatellites.
C) introns.
D) ring chromosomes.
A) genes that encode proteins.
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Fructose and galactose both have six carbon atoms, twelve hydrogen atoms and six oxygen atoms, just like glucose. A friend of yours says: "Since those sugars have the same number of atoms, they should have the same name." You answer: "While they do have the same number and type of atoms,
A. they are named differently because of their quaternary structures, which is very important in carbohydrates, especially glucose." B. they are all polysaccharides and have slightly different functions within organisms and therefore have different names." C. they are named differently because they are involved in different DNA nucleotide formation." D. they are named differently because when heated above their optimal temperature they become denatured and will not react with their substrates." E. they are named differently because they are alternate forms of the monosaccharide, glucose."
What would you expect to be missing in a plant that exhibits primary growth but not secondary growth?
A) An elongated stem B) Flowers C) Thick woody branches D) An expanded root system E) Vascular tissue
You and your neighbor each have a holly bush in your yards. You carefully water and care for your bush, but it fails to produce berries. Your neighbor, on the other hand, neglects his holly, yet it produces gorgeous red berries each year. Finally, in frustration, you replace your holly with a rose bush. The next year, your neighbor's holly bush has no berries at all. What happened?
A. Holly plants are dioecious. Yours was a male that was needed to pollinate the neighbor's female. B. The neighbor's bush became infected with the same disease that yours had. C. Roses secrete a chemical that inhibits the reproduction of neighboring plants. D. Roses compete for the same insect pollinators as holly bushes.
Bone cancer and other cancers of connective tissue are called
A. lymphomas. B. blastomas. C. carcinomas. D. sarcomas. E. leukemias.