Identify the following reaction: Lactose + H2O ? Glucose + Galactose
A) dehydration synthesis reaction
B) hydrolysis reaction
C) exchange reaction
D) reversible reaction
E) ionic reaction
B
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A mutant that has a nutritional requirement for growth is an example of a(n)
A) autotroph. B) auxotroph. C) heterotroph. D) organotroph.
Which of the following statements regarding the algal sister groups of land plants is not correct?
A. Their dispersal phase is in the water. B. They have diploid and haploid stages in their life cycle. C. Fertilization requires water. D. Their dominant, multicellular form is haploid. E. Their dispersal phase can be in the water or in the air.
Which phenotypes are parental?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) wild-type and orange
B) brown and bright-red
C) wild-type and brown
D) bright-red and orange
E) There is no way to determine this.
Atherosclerosis
a. decreases the size of the lumen of arteries. b. effects the diameter of veins. c. has no effect on the size of the lumen of arteries. d. increases the size of the lumen of arteries. e. presents many clinical symptoms immediately.